Imagine and You Shall Create!

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 Cretile is a kit of modular electronics & electro-mechanical blocks which can be
connected with each other like puzzle pieces. Electronic circuits can be made just by
connecting Cretiles to each other.

Cretile is designed in such a manner that Cretiles can be connected to each other only
in the right manner, avoiding possibility of wrong connection. When Cretile are
connected they hold each other strongly. This avoids troubles that could arise because
of loose connections.

Below image shows how three Cretiles can be easily connected to each other to make
a circuit.

Cretile offers a large number of blocks that perform different function. This allows you to
mix different functions and build incredibly large number of combinations and projects.

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1) While connecting two Cretiles,
place the Cretiles on a flat surface
such as table and connect by sliding
them against each other as shown
here.

Cretiles are very easy to connect to

each other. If you are finding it too
difficult to connect Cretiles to each
other, chances are you are
connecting them incorrectly.

2) Do not try to connect Cretiles

without any support of surface. This
may damage the pins connectors of
Cretile. Always place on a flat
surface while connecting.

3) While disconnecting two Cretiles do not pull Cretiles forcefully from each other. Firmly
hold one of the Cretiles and softly pull second Cretile out while moving it little up and
down.

4) Always switch OFF Battery/Power while making Cretile circuit.

5) Do not touch Cretile circuit part when Cretile circuit is switched ON. Make sure that
Cretiles do not come in contact with any liquid or metal. There are two exceptions to
this: submersible pump must be put in water and connectivity Sensor can touch metal
parts or liquids.

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Let’s understand how any Cretile block function. Below diagram shows Cretile ‘Switch’
block. It takes has one input and has one output.

Input Output

When Cretiles are connected to each other, a Cretile block receives ON or OFF signal at
its input. It then uses that input and changes it as required and provides output signal at its
Output pins. The next connected Cretile receives this output signal from previous Cretile at
input pins.

Let’s build our first circuit: Connect Battery/Power, Switch & Light as shown below.

STEP 1: Once connected, switch Battery/Power ON. Initially keep the Switch in OFF position.
See below diagram to understand ON or OFF signals that are exchanged between
Cretiles.

Step 1: Switch it ON Initially keep it OFF

ON ON OFF OFF OFF

STEP 2: In the second step, put the Switch in ON position. Now see below diagram to learn
how signals that are exchanged between Cretiles changes.
Step 2: Switch it ON

ON ON ON ON ON

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While ON and OFF terms are used for simplicity of understanding, in reality Cretiles gives
values from 0 to 99 at its output. It uses different voltage levels to tell 0 to 99 values to next
connected Cretile.

Zero is equivalent to OFF while 99 is equivalent to ON. Let’s relook at our circuit with this
new understanding.

STEP 1 can be visualized as below:

Step 1: Switch it ON Initially keep it OFF

99 99 0 0 Light
is OFF

STEP 2 can be visualized as below:

Step 2: Switch it ON

99 99 99 99 Light
Switches
ON

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Now let’s do an interesting change to our first circuit. Let’s replace Switch with a Dimmer.

Cretile Dimmer is similar to fan speed regulators. It provides different levels of output to the
Cretile connected to it.

As said before, Cretiles exchanges different values from 0 to 99 at its output. Values at
inputs and output for different Cretiles can be visualized as below.

Switch it ON Set Dimmer at 40

99 99 40 40 Light glows
at 40%
Brightness
In above setup, as Battery is switched ON, Dimmer receives value ‘99’ at its input. This
enables the Dimmer. As the Dimmer knob is set at ‘40’, it provides ‘40’ at its output which
is received by Light at its input. As Light receives ‘40’ at its input the Light glows at 40%
brightness.

Now set the Dimmer knob to 60 and observe the changes that happen.

Switch it ON Set Dimmer at 60

99 99 60 60 Light glows at
60%
Now, let’s add a Switch before the Dimmer as shown below: Brightness

Switch it ON Initially keep it OFF

99 99 0 0 0 0 Light is
OFF

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 Cretile Input Cretile Action Output
Battery - Provide power from 9v batteries 99
Switch 99 Depending on Switch position give 0
output
Dimmer 0 Dimmer gets enabled with zero input. 0
Depending on knob position it provides
output.
Light 0 Depending on input received glow the Light is OFF
Light.

As the Switch is in OFF position, Dimmer receives zero at its input and hence Dimmer is
disabled. Hence, irrespective of Dimmer knob position Dimmer will give zero at its output.

Now operate the Switch to ON position and observe the change as shown below. As you
put Switch in ON position, its output becomes ‘99’. This enables the Dimmer. As the Dimmer
knob is at ‘40’ Dimmer provide ‘40’ at its output. This is given as input to Light and hence
Light glows at 40% brightness.

Switch it ON Switch it ON

Light is ON
99 99 99 99 40 40
40%
Brightness

Cretile Input Cretile Action Output

Battery - Provide power from 9v batteries 99
Switch 99 Depending on Switch position gives 99
output
Dimmer 99 Dimmer gets enabled with 99 input. 40
Depending on knob position it provides
output.
Light 40 Depending on input received glow the Light glows at
Light. 40% brightness

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Cretile Battery/Power supplies power to other Cretiles connected to it. It takes power from
either a battery or from a DC adapter. You need to connect one 9V battery in the battery
socket provided. Alternatively connect the 9V/2A adapter provided at the power jack.
Preferably use rechargeable 9V batteries as they would not last long. If you connect a
non-rechargeable battery, ensure that you avoid using any motors or water pump in the
project as they would drain out the battery very quickly.

Red LED glows

Connect DC when battery
Power charge is low
Adapter
here Green LED
glows when
Mode Switch switched ON

The mode switch decides if power is taken from battery or adapter. A DC adapter can be
connected to Battery/Power as shown below.

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Step 1: Battery and holder have a small pin and a big pin each. The small pin of the battery
should fit in the big pin of the holder. The bigger pin of the battery should fit in small pin of
holder.

Step 2: First keep the battery in the holder as shown below.

Step 3: Now, push the battery from the back side as shown below.

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Then the battery pins will fit into battery holder pins.

Step 4: Finally press the battery from the top so that it fits in the holder.

Step 5: We are done with fixing the battery to the battery holder. Now, switch on the power
button.

LED glows
when
Cretile Push-button is similar to switch used in door switched
bell. It has one input and one output. It is by default ON
OFF. Cretile Push Button remains ON for the
duration the push button is pressed. Once the push
button is released, it switches OFF.

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 LED glows
when
switched
Cretile Switch allows you to control Cretiles
ON
connected to it. It has one input and one output. The
Cretiles connected on the output can be switched
ON or OFF with the switch provided on this block.

Cretile Light provides light for your creations. It has one

input to switch the light ON or OFF and to control light
intensity.

Cretile Buzzer provides sound for your creations. It has

one input to switch the buzzer ON or OFF.

Cretile Dimmer is similar to a fan speed regulator. If we

connect Dimmer to a Motor, it can change the speed
of Cretile Motor. Similarly, if connected to Light if can
be used to change intensity of Light. Dimmer can be
used is multiple other scenarios.

Make & learn: Connect Battery + Dimmer + Light in sequence & power-on the assembly. You can
vary the intensity of the Light by operating the dimmer knob. Similarly, speed of Cretile Motor, sound
of Cretile Buzzer etc. can also be controlled using Dimmer.

ON ON ON ON Light glows
Value = 40 Value = 40 at 40%
brightness

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 Connect
Sensor here
Cretile Sensor Base with Threshold allows you to make use of
various sensors in your project. You can connect variety of
sensors (one at a time) to Cretile Sensor Base. Sensors such as
Light Sensor, Obstacle Sensor, Magnetic Sensor, Sound sensor
and many others can be connected to Sensor Base. One such
example connection is shown below

Sensor connected generates ON or OFF signal depending on its functionality e.g. a Sound
Senor gemerates ON output when sound is detected. Sensor Base with Threshold makes
sensor singal available at it’s output.

Cretile Obstacle Sensor detects presence of an obstacle in front

of it. To use it, you need to connect it to the Cretile Sensor Base
with Threshold.

The sensor is ON when obstacle is detected. It switches ON when

an object is close enough in front of it. Sensor can detect objects
that are within few millimeters to few centimeters away from it.

Obstacle that you want to detect in your project could be near

or far. Note that Obstacle sensor does not detect black
surfaces/obstacles. It may detect black surfaces only if brought
very close to sensor.

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Cretile Light Sensor generates output based on
brightness of light shining on it. To use it, you need to
connect it to the Cretile Sensor Base with Threshold.

Make & learn: Connect Battery + Switch + Sensor Base with Threshold (with Light Sensor mounted
on it) + Buzzer in sequence & power-on the assembly. Switch ON Battery and put the Switch in ON
position. Use a flash-light/torch and focus light on Light Sensor. You will observe that the Buzzer will
sound loudly with more light and softly with less light shining on the Cretile Light Sensor.

Now put Switch in OFF position. The output of Switch changes to OFF which disables the Sensor Base
with Light Sensor. Thus Light Sensor does not respond to any changes in light shining on it. The output
of Light Sensor thus remains OFF. Buzzer receives OFF input and hence does not ring.

Below diagram shows different input and output states of Cretiles if Switch is in OFF position.

Switch it ON Keep Switch

OFF

ON ON OFF OFF OFF OFF OFF

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Motion Sensor is a sensor that detects the motion around. You must have heard about a
Burglar alarm. This alarm detects an intruder and start ringing loudly. This kind of devices
use a sensor called Motion Sensor.

Below image shows Motion Sensor. It needs to be used with Sensor Base. It generates ON
output when Motion around it is detected. Otherwise it generates OFF output.

This sensor keeps emitting signals called microwave signal. The sensor can detect when
these microwave signals are obstructed by any movement around it. So, we can use this
sensor in our projects to detect person, animal or object movement etc. e.g. You can use
this sensor if we want to switch ON Buzzer/light when car arrives near parking lot.

Note that in the beginning this sensor needs about 30 seconds to start functioning. After
30 seconds, it will detect motions around it. So, when you start the project that involves
Motion Sensor, do not expect correct results for the first 30 seconds.

This sensor can work even if it is covered or kept inside a wooden drawer or inside a metal
box. This makes it easy to use in different projects. The sensor however cannot detect
motion beyond brick walls. It works both in dark as well as in light. Note that this sensor can
only detect motion of objects that are 5 centimeters or more away from the sensor. So, if
the object moving is too close to the sensor, it will not detect it.

Cretile Wire is used when you need to connect two Cretiles kept at a distance. Wire gives
you flexibility to keep the Cretile blocks in different location as per your project
requirement.

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Cretile Threshold with Sensor Base is useful in projects
where you want action to happen only if input is more
than a certain value. If input is less than dial position
value, the output remains OFF. When input is more
than dial position value, output becomes ON
Make & learn: Let’s build a morning alarm that will ring only when the room brightness increases beyond a
certain level. Here you will use Cretile Threshold to control the level of brightness beyond which the Buzzer
should switch ON

Connect Battery + Threshold with Sensor Base+ Mount light sensor on Threshold with Sensor Base+ Buzzer in
sequence & power-on the assembly. Keep the Cretile Threshold module at say 20% position. Keep this assembly
at a place where morning sunlight can fall on the Cretile Light Sensor. In the morning, when sunlight brightness
increases beyond 20%, the buzzer will start ringing. If you increase Threshold to 30% then it will take more light
for the alarm to turn ON

Cretile Motor provides motion to your

creations. The Cretile Motor comes with
a wheel and a pulley. Motor has two
inputs: one to control speed of motor &
other to control direction of motor.

Prefer using Cretile Rechargeable

battery or Cretile DC Adapter instead of
Cretile Battery while using Motor as it
consumes more energy and could drain
out batteries quickly.

Cretile Motor also allows you to use other types of motors in your project. You can
connect motors such as High Speed Motor, Submersible Pump Motor and Vibration
Motor can be connected to Motor Module. We shall learn about this in the later
sections.

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Make & learn: Connect Battery/Power + Dimmer at 'Speed’ input. Connect Cretile Switch at
'Direction’ input and power-on the assembly. With Dimmer you will be able to change Motor speed
& with Switch you will be able to change Motor direction.

Cretile Copy is useful when you want to control two or more

Cretiles with only one input. Input of COPY gets replicated at its
three outputs.
Make & learn: Let’s say you need to change both light intensity and
motor speed with one dimmer. Connect Power + Dimmer + Copy in
sequence. Connect Motor speed at one of the outputs of Copy.
Connect Light at other output of Copy. Now, power on the assembly.
As you operate the dimmer, light intensity and motor speed changes
simultaneously

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Cretile High-Speed rotates at high-speed as compared to Cretile Motor. You need to
connect high-speed motor to Cretile Motor module as shown below. The kit comes with
accessories such as fan etc. that can be mounted on the motor shaft.

Connect
here

Make & learn: Let’s say you need to control High Speed motor speed using dimmer. Connect
Battery + Dimmer + Motor mounted with High Speed Motor in sequencer. Connect Motor Module
speed port at outputs of Dimmer. Now power ON the assembly. As you operate the dimmer, High
Speed motor speed changes simultaneously.

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Submersible mini water pump can be used for pumping water. The pump has to be
immersed completely inside water. This pump has to be used with Cretile Motor module as
shown below.

Connect
here

Now immerse the pump completely inside water as shown below to use it.

Cretile ProLogic is a programmable module. It

can be programmed using ArduBlock* or by
writing C/C++ code.

ArduBlock provides a simple drag and drop

Graphical User Interface (GUI) to build a
program Logic.

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The ArduBlock environment looks like below

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Alarm whenever car comes very near to the wall while parking.

 Power / Battery
 Sensor base with Threshold
 Obstacle Sensor
 Buzzer

 5 mm Sun board/ Cardboard

 Double sided gum tape

Make the Cretile assembly as shown below.

Make a car parking lot using cardboard as shown in image below. Fix the Obstacle sensor to the
rare side wall of the car parking.

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 OBSTACLE SENSOR

Keep moving the car backwards and identify the position at which the Buzzer should start to ring.
At this position adjust the threshold of the sensor base.
The alarm should ring only if the car comes too close to the wall of the parking. If it is at safe
distance, then it should not ring.
When the car comes too close to the wall the Obstacle shall detect it and send ON signal to Buzzer
which will start ringing. This will assist the car driver in parking safely.

 Improve this alarm system with more than one Obstacle sensor.

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 Build a project to scare the birds

1) What is the need to drive-away birds?

Birds are very good to see; but if they trouble us by spoiling some crops or making the place
dirty then it will be a disturbance for us, hence we need to scare the bird in such places
 How can we drive birds away?
Birds will be scared of many things like harsh/unusual sound and bright light etc.
 How to recognize the presence of birds?
Motion detection sensor will recognize the presence of birds.

 Power or Battery
 Switch
 Motion Detection Module
 Motor Module
 Pulley
 Stick
 Refill
 Sheet of cardboard/foam sheet/sun-board

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 Connect Battery, Switch, Motion Detection Sensor, Motor Module, Pulley, Stick and Refill in a
sequence as shown in below diagram
 Switch Battery/Power ON
 Keep assembly in a place where you need to scare away birds
 If any bird comes near the Motion Sensor Module the motor will starts rotating the figure
mounted on top of it scaring away the bird.
 Following diagram shows complete assembly of project

Front View Back View

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 Build an automatic control system for tap.

 Water is an essential resource in the world so it is an important asset.

 Generally, in home, hotels, schools it happens that after tap is opened, we forget to close it.
Water will be wasted if we don’t close tap.
 The automatic control system for tap water which can save wastage of water without the
presence of any operator physically.
 What Components will you need?
 Which Sensor can we use to sense if person needs water
 Think where else can we use this?

1. Battery
2. Sensor Base with Threshold
3. Motor Module
4. Obstacle Sensor
5. Submersible Water Pump

Connect the Cretile blocks as shown in below diagram.

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Fix obstacle sensor to pipe using tape as shown in below figure. It should be fixed slightly above
the end of pipe so that flowing water doesn’t touch the sensor.

 Battery gives the power to other Cretiles connected to it.

 Sensor base allows you to make use of various sensors. We have used obstacle sensor to
detect the presence of hand in this project.
 Obstacle Sensor will switch ON when object is detected. It switches OFF when there is no
object.
 Submersible water pump which is connected to pump/motor, used for pumping water and
it has to be immersed completely inside water then it initiates the flow of water.
 Thus when Obstacle sensor detects the hand, then the pump will start and water starts
flowing from the tap.

 Use pulse/Delay module to release only fixed amount of water.

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To write a program that makes the light Blink.

What is blinking?
Find any LED light in your house. Use button to switch on and then off for some time with same
gap of time. LED bulb or light will switch on and off with same interval. This is called blinking.
Now instead of manually pressing the button on and off if we had a program to do this then what
steps or commands will be required?
Write down these commands or steps on paper.

 Power or Battery
 Prologic
 Light

The steps required to follow to make a Light blink are:

1. Switch ON the Light
2. Wait for a while (e.g. 1 second)
3. Switch OFF the Light
4. Wait for a while (e.g. 1 second)
Above four steps, if done again and again will blink light.
Typically, students miss step number four. Show them what happens when a room light is turned
OFF for a fraction of second and immediately turned ON. Human eye cannot detect a very short
duration between two light ON actions. It appears that the light was always ON.
Our computer is very fast and if step four is missed the Light will be turned OFF only for a fraction
of a second and then turned ON immediately. So, we would observe that the Light is constantly ON
instead of blinking.
Also, the four steps mentioned above needs to be done in a repeated manner. If not done
repeatedly, then the light will switch ON for a second, then switch OFF and then will remain

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switched OFF as there are no further instructions. So, the four steps mentioned above have to be
done again and again to get the blink action.

Connect the Cretiles as shown above.

Open ArduBlock and let's start programming.

STEP 1: Switch ON the Light
As the Cretile Light is connected at OUT-1 below step is required to switch the Light ON.

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STEP 2: wait for a second
Open the 'Time' drawer and use 'delay SECONDS' function from it as shown below:

STEP 3: Switch OFF the Light

To switch OFF the Light connected at OUT-1 use below step

STEP 4: wait for a second

After switching OFF the light we need to wait for one second. Do it using 'delay' function as shown
below

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Doing it again and again: as discussed before we want the above four steps to be performed
again and again. Note that we have added these four instructions in the loop section of our
program. The steps mentioned in the loop section of the program are carried out by our computer
again and again until the computer is switched OFF.

Now upload this program to ProLogic and observe the output. You shall find that the Light switches
ON for a second and then switches OFF for one second and this keeps happening again and again.

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Learn how to use ‘if/else’ statement in programming.

‘if/else’ is used in situations where two outcomes are possible. For example, when we toss a coin,
there are only two outcomes- one is getting a heads and the other is getting a tails.
‘if/else’ block consists of three parts as shown below:

'test' section: Here, we write the condition

that we intend to test

'then' section: Here, we write steps that we

want to be executed if condition is satisfied.
That is if the condition is true, execute steps
given this 'then' section.

'else' section: Here, we write the steps

that we want to be executed if the
condition does not satisfy. That is if the
condition is false, execute the steps given
in this 'else' section.

 Battery Module
 Dimmer
 ProLogic
 Light
 Buzzer

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Let’s write a program to switch ON Light and Buzzer in different conditions. We will use a Dimmer,
a Light & a Buzzer. The aim is to turn ON and OFF Light and Buzzer depending on the Dimmer
value as below:
1. Dimmer position Less than 50 (i.e. for values between 0 to 49) Light should be turned ON while
the Buzzer remains OFF

2. Else, that means if Dimmer position is greater than 50 (values between 50 to 99) Buzzer should
be turned ON while the Light should remain OFF

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 We have to first read position of the Dimmer connected at IN-1. The Dimmer position will be
stored in the variable ‘dimmer_reading’

 Now check if the Dimmer position is below ‘50’ or not. To do so, use ‘if/else’ block with less
than (<) test condition

 If condition is True (i.e. dimmer_reading is less than 50):

 Light is connected at OUT-1. Write ‘99’ to OUT-1 to switch it ON.

 Buzzer is connected at OUT-2. Write ‘0’ to OUT-2 to switch it OFF.

 If condition is False (dimmer_reading is more than 50): We will write ‘99’ at OUT:2 to switch
ON the Buzzer and write ‘0’ to OUT:1 to switch OFF the Light

 Light is connected at OUT-1. Write ‘0’ to OUT-1 to switch it OFF.

 Buzzer is connected at OUT-2. Write ‘99’ to OUT-2 to switch it ON

 Use '60' as threshold value instead of '50'. Try other threshold values

 Write program for

 If conditions is true

 Switch ON Light with full brightness

 Switch ON Buzzer with half sound level

 If conditions is false

 Switch ON Light with half brightness

 Switch ON Buzzer with full sound level

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Learn how to use subroutines to simplify programs.

Sometimes in lengthy programs, there can be chances of having same task to be performed at
different places of the code. It becomes a laborious task for the coder to write the same lines of
code many times in different places. So, we use ‘Subroutine’ for this purpose.
Same repeated commands are placed in a subroutine. Now repeated common commands are
replaced by calling the subroutine using a single line of code. Subroutine is also used to make the
code readable.
For example, every time we want to blink light we have to use 4 blocks
1. Write local output value 99
2. Delay few milliseconds
3. Write local output 0
4. Delay few milliseconds

Whenever we want to blink we need to write above commands. But if we give name to these 4
commands as Blink, then whenever we want to blink we will refer to these commands simply by
name Blink without writing all the commands required to blink.
There are two parts for using subroutine:
1. Subroutine
2. Calling the subroutine

Used for calling the

subroutine

Here code for the

subroutine is written

 Battery
 2 Switches
 ProLogic
 Light

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Let’s write blink program which we have done earlier using subroutine.

Connect the Cretiles as shown above.

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Understanding Variables in programming

Variables act as memory that we can read and write in a program. They are like storage boxes where
we can store any item safely and sometime later we can open the box and use items kept in it. We
can even pass the box to someone else and he/she can open the box to access item stored in the
box. We generally label such box to identify what it contains. For example we label jars in kitchen
with Sugar, Salt etc. to identify them later easily.
In similar way, we can store any value in variable and later on read the value stored in the variable.
Like we label boxes, we give meaningful name to variables to identify what type of values it may
store.
Let’s learn how to use variables in Ardublock program.

 Light Module
 ProLogic
 Push Button
 Battery

Let’s write a simple program which will simply switch on Light until Push Button is pressed.
Connect ProLogic, Push Button, Light and Battery Module as shown in diagram below.

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After uploading program to ProLogic, when we press pushbutton Light connected to OUT-1 will
switch on. Once we release the Push Button, Light will switch off. Working of the code using Variable
is shown in CODE section above.

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Learn how to program a robot to follow a pre-programed path using Subroutines.

Sometimes in lengthy programs, there can be chances of having same task to be performed at
different places of the code. It becomes a laborious task for the coder to write the same lines of
code many times in different places. So, we use ‘Subroutine’ for this purpose.
Same repeated commands are placed in a subroutine. Now repeated common commands are
replaced by calling the subroutine using a single line of code. Subroutine is also used to make the
code readable.
For example, every time we want to blink light we have to use 4 blocks
5. Write local output value 99
6. Delay few milliseconds
7. Write local output 0
8. Delay few milliseconds

Whenever we want to blink we need to write above commands. But if we give name to these 4
commands as Blink, then whenever we want to blink we will refer to these commands simply by
name Blink without writing all the commands required to blink.
There are two parts for using subroutine:
3. Subroutine
4. Calling the subroutine

Used for calling the

subroutine

Here code for the

subroutine is written

 Battery
 ProLogic
 Motors - 2

 Wheels – 2

 USB Cable

 Connect the modules as shown in the below diagram

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 Place the assembly on the 5 mm sun board
 Attach the caster wheel to the bottom side of the sun board
 Place the at the appropriate place as shown in figure

 Place the entire assembly on the cardboard as shown in figure. Also, connect the wires from the
motor modules to the ProLogic as shown in figure.

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Copyright @ MakerInMe Technologies Private Limited P a g e | 45
A subroutine consists of a group of programming lines (code). A subroutine is used when there are
certain lines of code that are repeatedly used in the program. It is also used to make a huge program
seem easier to understand
There are five subroutines used in the above program.
1. Forward

2. Backward

3. Right

4. Left

5. Stop

1. Forward- As motor are connected in opposite direction. To make Robot move Forward, M1
motor should rotate in clockwise/forward direction and M2 motor in anti-clockwise/reverse
direction. So the robot will move forward on using this subroutine.

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2. Backward- As motor are connected in opposite direction. To make Robot move Backward M1
motor should rotate in anti-clockwise/reverse direction and M2 motor in clockwise/forward
direction. So the robot will move backward on using this subroutine.

3. Right- As motor are connected in opposite direction. To make Robot turn right both motors
should rotate in anti-clockwise/reverse direction. So the robot will turn right on using this
subroutine.

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4. Left- As motor are connected in opposite direction. To make Robot turn left both motors
should rotate in clockwise/forward direction. So the robot will turn left on using this subroutine.

5.Stop- This subroutine makes both the motor speed to zero. So the car will stop on using this
subroutine.

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Prepare a robot that changes its path when an obstacle comes in its way

Where can obstacle detection be useful?

Obstacle detection can be very useful in the robotics. Have you seen a floor cleaning robot?

If we develop (floor) cleaning robot then obstacles like table, chair, cupboard etc. will be a
problem for the robot and robot has to avoid hitting them and avoid getting stuck at one place
while cleaning room.

Hence if we use obstacle detection system, robot can change direction when it encounters an
obstacle.

How can we detect the obstacle?

We can use the obstacle sensor to detect the obstacle.

 ProLogic
 Data cable
 Battery
 Motors
 2 Robotic wheels
 2 Obstacle sensors
 5 mm sun board

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Connect the modules as shown in the below diagram

Place the assembly on the 5 mm sun board

Attach the caster wheel to the bottom side of the sun board

Place the Obstacle sensors at the appropriate place as shown in figure

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Let us learn the programming part of this project

Below ArduBlock program is the complete program of above project

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 Place the entire assembly on the cardboard as shown in figure. Also, connect the wires from the
motor modules to the ProLogic as shown in figure.

 Place the Obstacle Sensor on the front side of the robot as shown in figure.

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You must have received login credentials for edu.cretile.com. In case you have
not, you can always request it by sending an email to support@cretile.com

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Cretile NOT performs inverting operation. It has one input and
one output. If input is ON, its output switches OFF. Likewise,
when input is OFF, its output switches ON.

Make & learn: Connect Battery + Switch + NOT + Light in sequence & power-on the assembly. When
you operate Cretile Switch to ON position the Light switches OFF. Similarly, when you operate Cretile
Switch to OFF position the Light switches ON

You can use Cretile Connectivity to test electrical conductivity of an object. Connect the
Cretile Connectivity to Cretile Switch as below. Now connect pins on two sides of the
object to be tested. If the object is good conductor of electricity, then Cretile Switch
switches ON.

LED glows if
current
Connect passed
here through the
object under
test

You can connect Limit Switch to Push Button as well instead of Switch.

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Make & learn: Connect Battery + Push Button with Connectivity Sensor + Buzzer in sequence & power-on the
assembly. Connect the sensor pins to two sides of an iron metal piece e.g. a coin. As metal is a good conductor
of electricity, sensor generates ON at the output of Push Button and hence the Buzzer starts to ring.

Now disconnect the sensor pins from coin and connect those to a plastic piece. As plastic
is bad conductor of electricity, sensor generates OFF at the output of Push Button and
hence Buzzer starts to ring.

Cretile Switch or Push Button can be extended to operate using a Limit Switch as shown
below. This way Cretiles connected to Switch can now be switched ON or OFF either by
operating the button on the Switch or by operating the Limit switch.

Press either
of them to
switch ON
LED glows
when
switched
ON

Connect
here

You can connect Limit Switch to Push Button also. Once connected it would look like as
below.

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As we keep adding more components to the circuit, the circuit become elongated. This
would require more space and difficult to handle. U-Right and U-Left in a circuit helps to
reduce the circuit length and add row to the circuit. U-Right and U-Left will have one input
and one output port.
Make & learn: Let’s consider the below circuit, it is elongated and difficult to place in small area. In this case
we can use U-Right and U-Left to add rows to the circuit.

U- Right in the circuit will add a row to the bottom of the circuit and reduce the length of
the circuit

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U-Left in the circuit will add a row to the top of the circuit and reduce the length of the
circuit.

Cretile Pulse/Delay can perform two functions: A Time Pulse or Time Delay.

The functionality can be decided by using mode switch. It has one input and one output.

MODE SWITCH

Cretile pulse is used in situations where you want the action to happen only for a certain
amount time.

Make & learn: Let’s make a project that keeps the Cretile Light switched ON for 10 Seconds
only. Battery Module + Push Button+ Pulse/Delay + Light in sequence. Put the Cretile
Pulse/Delay in Pulse mode. Set the Pulse value to 10 seconds with ‘CHANGE VALUE'
buttons. Use ‘SAVE’ switch to store the Pulse value for future use. Now operate Cretile Push
Button once. You will observe that the Cretile Pulse starts counting down from 10 to zero.
During this period the Cretile Light remains ON. Once the countdown reaches zero, the
Cretile Light goes OFF.

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Even though the Push Button is switched ON only for a moment, the switching ON action
is stretched to the 10 seconds, as if you had pressed the push button for 10 seconds.

Cretile Delay is used in situations where you want the action to happen after a certain
amount of time.

Make &learn: Let’s make a -down alarm. Use Battery + ON/OFF Switch + Pulse/Delay +
Buzzer in sequence. Initially keep the Cretile Switch in OFF position. Set the Cretile
Pulse/Delay to delay mode. Set the Delay value to 10 seconds with ‘CHANGE VALUE'
buttons. Use ‘SAVE’ switch to store the Delay value for future use. Now operate Switch to
ON position. You will observe that the Cretile Delay starts counting down from 10 to zero.
During this 10 second period the Cretile Buzzer remains OFF. Once the countdown reaches
to zero, the Buzzer starts to ring.

You have delayed the action of switching ON the Buzzer by 10 seconds after operating
the switch.

Cretile Transmitter and Cretile Receiver talk to each other wirelessly. It gives your projects
ability to remotely control and take action. Cretile Transmitter has four inputs. It sends these
four input values wirelessly to Cretile Receiver.

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Cretile Receiver is always listening to messages from Cretile Transmitter. Four outputs of
Receiver reflect what is received by it.

Cretile Receiver and Transmitter need separate power supply. You can use either Cretile
Power or Cretile Battery for supplying power to Cretile projects.
Make & learn: Connect Cretile Switch to one of its inputs of Cretile Transmitter, say Input-3 (IN-3).
Connect Cretile Light to corresponding output of Receiver, in this case Output-3 (OUT-3). Now
operate the switch on the Cretile Switch to ON position. It will switch ON the Cretile Light connected
at Receiver.

You can connect any or all the four inputs at Transmitter to control corresponding four outputs
connected at Receiver.

Cretile Sound Sensor detects sound. To use it, you need

to connect it to the Cretile Sensor Base. The sensor by
default remains switched OFF indicating no sound
detected by it. It switches ON when sufficiently loud
sound is detected by sensor.

The sensor remains ON only momentarily for duration of

sound detected. E.g. when you clap around the Sound
Senor it remains ON for a short duration of the clap.

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Make & learn: Connect Cretile Sound Sensor to Cretile Sensor Base with Threshold. Now, connect
Battery + Sensor Base with Threshold (with Sound Sensor mounted on it) + Pulse-Delay + Light in
sequence. Put the Cretile Pulse/Delay in Pulse mode. Set the Pulse value to say 600 seconds with
‘CHANGE VALUE' buttons. Use ‘SAVE’ switch to store the Pulse value for future use. Now clap near
the Sound Senor. You will observe Sound Sensor detects the clap sound and gives ON Signal to
Cretile Pulse. The Cretile Pulse starts counting down from 600 to zero. During this period the Cretile
Light remains ON. Once the countdown reaches zero, the Cretile Light goes OFF.

Cretile Magnetic Sensor detects the presence of

magnet near it. To use it, you need connect it to the
Cretile Sensor Base with Threshold.

The sensor is by default OFF and switches ON when a

strong magnet is brought close to it.

It will work only with one of the sides (pole) of a magnet.

So, try both sides of the magnet to check which of the
sides work.

Make & learn: Connect Cretile Magnetic Sensor to Cretile Sensor Base with Threshold. Now, connect
Battery + Sensor Base with Threshold (with magnetic sensor mounted on it) + Light in sequence. Now
bring a strong magnet close to the senor. You will observe that the Light glows when the magnet is
close to the sensor.

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Cretile Vibration Sensor detects vibration of the surface on
which it is placed. To use it, you need to connect it to the Cretile
Sensor Base with Threshold.

By default, Cretile Vibration Sensor remains OFF. It switches ON

when vibration is detected on the surface on which it is placed.
E.g. The sensor switches ON when surface on which the sensor
is placed is tapped.

Cretile Tilt Sensor detects the surface is titled on not, on which it is placed. To use it, you
need to connect it to the Cretile Sensor Base.

Cretile Tilt Sensor by default remains OFF when placed on a flat surface that is parallel to
ground e.g. on the top surface of a table. It is switched ON when the sensor or surface on
which it is mounted is tilted.

Tilt Sensor mounted on a Tilt Sensor mounted on a

robotic vehicle moving robotic vehicle climbing
on a flat surface a titled surface

Cretile Vibration Motor provides vibration functionality similar to that of vibration in

smartphone when an incoming call comes. You need to connect Vibration Motor to Motor
driver as shown below.

Connect
here

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Cretile Servo Motor can be used in projects where you need to control position of motor
shaft e.g. in project where you need to wave flag or move motor shaft to a specific
location and stop. You can mount the object to be moved on shaft of the servo motor
and control the motor movement as required.

Make & learn: Connect Cretile Battery + Dimmer + Servo Motor in sequence as shown below. Switch
the Battery ON and operate the Dimmer for different values. You will observe that the shaft of the
motor moves according to the Dimmer position.

Cretile AND provides functions of AND Logic Gates. Cretile AND has two inputs and one
output. Below table explains how AND Logic Gate function depending on inputs provided
to it.

AND
IN1 IN2 OUT

ON ON ON

ON OFF OFF

OFF ON OFF

OFF OFF OFF

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Make & learn: Connect Battery + Push Button at Input1of Cretile AND. Connect Switch at Input2 of
Cretile AND. Connect Light at the output of Cretile AND as shown below. You will observe that the
Light glows only when both the Push Button and Switch are ON. If any one of them are OFF, the
Light will remain OFF.

Cretile OR provides functions of OR Logic Gates. Cretile OR has two inputs and one
output. Below table explains how OR Logic Gate function depending on inputs provided
to it.

OR
IN1 IN2 OUT

ON ON ON

ON OFF ON

OFF ON ON

OFF OFF OFF

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Make & learn: Connect Battery + Push Button at Input1 of Cretile OR. Connect Switch at Input2 of
Cretile OR. Connect Light to output of Cretile OR as shown below. You will observe that the Light
will be switched ON if any of the Push Button or Switch is switched ON. The Light will be ON even if
both Push Button and Switch are switched ON. The Light will go OFF only when both Push Button
and Switch are OFF.

Toggle is not a Logic gate. Toggle reverses the currently present output. So, upon switching
ON input, if the present output is ON, it goes to OFF state. Similarly, upon switching ON
input, if the present output is OFF, it goes to ON state.

A real life example is TV power that toggles when remote input is given. On pressing the
power button on the remote the TV switches ON if it is currently OFF. Otherwise, it switches
OFF if already ON.

Below table shows how Toggle input will change the output

TOGGLE

INPUT OUT
First ON ON

Second ON OFF

Third ON ON

Forth ON OFF

And so on….

Retains previous
OFF
output

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Make & learn: Connect Cretile Push Button to Input and Cretile Light to Output of TOGGLE Module .

Once you press the Push Button at Input the Light will switch ON. If you press the Push Button again,
the output will switch OFF. So, output toggles between ON and OFF every time Push Button is pressed
at the input.

Cretile SmartSwitch lets you to control 240V/5A appliance with Cretile. Cretile SmartSwitch
looks like a regular wired extension box that we use in home or offices. It has one Cretile
input. You can control an appliance connected to SmartSwitch with Cretile logic
connected at this Cretile input.

Two-way 240V/5A
ON/OFF Power Inlet
Switch

Power Outlet Cretile

Input

WARNING: Do not connect any appliance that has rating above 240V/5A rating. Typically,
in India, appliances such as a table lamp, night lamp/ Phone chargers etc. should be of
rating equal to or below 240V/5A rating. However, read appliance rating and ensure
compatibility before connecting. If you are not sure, do not connect appliance to
SmartSwitch. Take help from an expert or call/email to Cretile support for further assistance.
Make & learn: Let’s control a table lamp with Motion detection. Make the connections as below.
Connect the table lamp at SmartSwitch socket.

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Connect Battery + Motion Sensor + Pulse Module in sequence at Cretile input. Connect the power
input to 240V wall power and switch ON the power supply. You would observe that the table lamp
does not switch ON.

Now switch the Cretile Battery ON. Motion Sensor starts to detect the motion around it. When some
motion happens around Motion Sensor it switches ON the table lamp. With Pulse the table lamp
shall remain ON for at least time set on it. When motion around the Motion Sensor stops, it will switch
OFF the table lamp.

Note: Motion Sensor takes about a minute to start functioning correctly. After powering ON, wait for
about a minute before you expect your Motion Sensor based projects to function correctly.

You will find that SmartSwitch also an ‘Two-way ON/OFF’. This switch alongwith ‘Cretile
Input’ operates the applience connected to it. Below table illustrates the same.

Cretile Input Two-way ON/OFF Switch Action on Applience connected

ON ON ON
ON OFF OFF
OFF ON OFF
OFF OFF ON

Note that, when Cretile input is OFF and Two-way switch is also in OFF position the
applience conneced to SmartSwitch switches ON.

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When you receive you kit, do the following:
 Quickly check if all the components in the kit are working as expected. Refer to
“Functioning of Cretiles” section from the manual for this.
 Check if there is any physical damage to any part of the kit

If you find any issue with your kit, do not worry; report the same by writing an email to
support@cretile.com and include the below items in the email
 Use suitable subject line such as “Need support for Cretile kit – Your Name”
 In the body of the email mention the below:
o Your Name:
o Address:
o Phone Number:
o Kit Name:
o Date of purchase:
o Where did you purchase the kit:
o Describe the problem you have identified with the kit
 Attach relevant photos/short videos of the same problem. This could help us resolve
the issue faster for you

We will revert to your email at earliest we can. Typically, it could take from a couple of
days to a week for us to contact to you.

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Follow this section when you think that the kit is not functioning as expected. It is very likely
that the kit is functioning as expected and you have missed taking a specific step or missed
taking a step while making projects using Cretile. This section will help you identify the
same.

1. Ensure that Cretiles are firmly connected to each other and there is no gap left between
two Cretiles

Incorrect
connection

Correct
connection

2. Low charge on battery: one of the primary causes of your Cretile assembly not working
as expected could be that the batteries that you are using have ran out of power. Try with
new batteries or charge the batteries sufficiently in case you are using rechargeable
batteries.
Note that ‘Battery & Power’ combined Cretile has a low battery indicator as shown below

Red LED glows

when battery
Connect DC
power is low
Power
Adapter Green LED
here glows when
switched ON
Mode Switch

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3. Ensure that Battery/Power ‘Mode Switch’ is incorrect position
4. Using Motor/Pump/High Speed Motor/Vibration Motor: As compared to other Cretiles
these ones consume much higher amount of power. Hence it is recommended not to use
these with ‘non-rechargeable’ batteries. Always use sufficiently charged rechargeable
batteries or along with DC adapter.
5. Receiver and Transmitter not working: Receiver (RX) and Transmitter (TX) use wireless
communication mechanism. Similar mechanisms are used by commonly used electronic
devices such as hands-free phone, Wi-Fi, Bluetooth devices such a speaker etc.
Depending on situation and time these devices may disturb the functioning of Cretile
Transmitter and Receiver and they may not work as expected. In such situations, either
figure out a different place to work on your project or try after sometime.
6. If you working in a school/lab with multiple groups using Cretile TX/RX, ensure that you
are using them in pair.
7. Keep in mind that the distance within which TX and RX can talk to each other depends
on obstacles in between them. E.g. if there is wall in between RX and TX the distance of RX
TX communication reduces.
8. While using Submersible Pump, ensure that the pump is fully dipped inside the water.
Maintain sufficient quantity of water in the container so that water level is above the pump
for sufficient number of operations of project

1. Only use Arduino/ArduBlock software version provided by Cretile. The latest version
can be found at www.cretile.com in the downloads section
2. When you open the development environment, sometimes, it shows you a message
stating a new version of the software is available to upgrade. DO NOT upgrade to
newer version; click ‘No’ and continue.

3. Open Arduino IDE, go to ‘Tools’ menu and click on the ‘Board’ sub-menu. In this
‘Arduino Nano’ must be selected while working with ProLogic
4. Open Arduino IDE, go to ‘Tools’ menu and click on the ‘Port’ sub-menu. A COM port
where ProLogic is connected must be selected. Note that if you see more than one
COM port in the ‘Port’ menu then disconnect the ProLogic and check the COM ports
visible in the ‘Port’ menu and make a note of them. Now again connect the ProLogic
and check which COM port newly got added to this list. This newly added com port is
what you should select.

1. When you remove, reconnect the USB cable between your PC and ProLogic, you
might have select the COM port from the tools menu of Arduino IDE.
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2. When you drag a block from drawer and drop it in canvas, it comes with some
default parameters e.g. WRITE block will come with OUT-# as 1 and data as ‘99’.
Remember to update it as per connections in your setup.
3. While working with remote inputs and remote outputs, ProLogic must be switched ON
first. Only after ProLogic is switched ON, TX and RX should be switched ON. The order of
TX and RX switching ON does not matter as long as ProLogic is switched ON first.
4. One of the Setup block is present in ArduBlock Setup section
5. You must connect Battery/Power to ProLogic and keep the Battery/Power switch to
ON position

1. Ensure that you have installed ‘Cretile.apk’ in your Android device. Without this app,
the application that you have developed will not be able to communicate with
ProLogic. Refer to ‘Setting up your Android Device’ section from the manual for
instruction to install ‘Cretile.apk’
2. Ensure that you are using a USB data cable to connect ProLogic and Android
device. Some of the USB cables have only charging capabilities and not data transfer
capabilities.

Thank you for purchasing Cretile. Please read the instruction manual carefully before using the product.
Please ensure that the product is used under adult supervision.

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 BASIC INSTRUCTIONS
 Always assemble or de-assemble Cretiles in power-off mode
 Always ensure that the product is used under adult supervision and not left unattended.
 Always ensure that the circuit does not come in contact with any metal objects or liquids.
 Always ensure that the product is utilized along with a high quality ISI/ISO/BIS certified 9V 2A adapter
with a compatible DC PIN for the power jack in Power module.
 Always ensure that the product is utilized with 9V PP3 battery when using Battery module.
 Always ensure that the battery is connected with correct electrical polarity. Caution should be taken not
to short-circuit battery terminals to each other which can damage the product and generate heat that
may result in burns.
 Always take maximum precaution while plugging in batteries so that they are not connection to any
wrong electrical polarity. Wrong electrical polarity can cause fire or burns.
 Always ensure that the product is used within 0 (zero) to 50 (fifty) degree temperature range only.
Exposure to direct sunlight should be avoided.
 Never recharge a non-rechargeable battery.
 If using rechargeable batteries follow the charging instructions as prescribed by battery manufacturer.
Do not overcharge.
IMPORTANT: PLEASE READ CAREFULLY
Please ensure that you have read and complied with all the details provided on the brochure/instruction
manual placed. Please ensure safe and supervised usage of the entire product. In the event that any of
the components of the product are dropped, the product may not function as desired. We do not make
any express or implied warranties of any kind with respect to the product and we expressly disclaim any
warranties of merchantability or fitness for a particular purpose. By using this product, you acknowledge
and understand that the battery and the adapter provided separately have not been manufactured by us
and we shall in no event be held liable for any loss or damage that may arise as a result of the use of
such battery and the adapter. Kindly ensure that you have read and complied with all the instructions
provided for the use of the battery and the adapter by the manufacturer. We shall not be held
responsible for any incidental, indirect, consequential, or special damages that may arise as a result of
the use of the product. Your use of the product implies your acceptance of these terms. If there are any
defects or defaults in the product, kindly contact support@cretile.com within 10 (ten) days from the
date of purchase of the product and the same would be replaced.
Any dispute which may arise as a result of the use of this product shall be subject to the jurisdiction of
the Courts situated in Bangalore, Karnataka. Kindly keep the instruction manual and package for
reference as they contain important information.

A PRODUCT OF

© 2020, MAKERINME TE CHNOLOGIES PRIVATE L IMITED, ALL RIGHTS R ESERVED

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