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Classroom AC Control via IR Sensors

The document proposes a system to control air conditioning units in a classroom based on the number of people in the room detected by infrared sensors. The system would use IR sensors on the doors to count people entering and exiting, and send that count to a microcontroller running a bidirectional counter. The counter value would then be used to adjust the temperature setting on the AC units remotely to save energy when the room is empty. The system aims to conserve energy by only running the AC units when needed based on occupancy detected through IR sensors and a microcontroller counter system.

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LH Maca
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30 views2 pages

Classroom AC Control via IR Sensors

The document proposes a system to control air conditioning units in a classroom based on the number of people in the room detected by infrared sensors. The system would use IR sensors on the doors to count people entering and exiting, and send that count to a microcontroller running a bidirectional counter. The counter value would then be used to adjust the temperature setting on the AC units remotely to save energy when the room is empty. The system aims to conserve energy by only running the AC units when needed based on occupancy detected through IR sensors and a microcontroller counter system.

Uploaded by

LH Maca
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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“POPULATION DEPENDENT CLASSROOM AIRCONDITION CONTROL USING

Working Title:
WIRELESS COMMUNICATION”
I. CONCEPT
With the common classroom setup in NEU with two doors, both used for entry and exit, and
two AC units, the goal is to install a system where the number of people inside will be counted and
the temperature will be controlled. Assuming that there are already students inside the classroom,
everyone that will enter will be counted, as well as every exit. This will be done using IR sensor
installed on the wall beside the door. Since there are two doors, the count will be synced into one
counter only. The counter will “tell” the remote whether in increase or decrease the temperature
setting. When the counter says 0, the ACs will turn to “standby mode”. (more)

II. RRL
(still searching for a study related to the relationship of room population to room temperature)

III. PARTS
A. Power Supply
 5 V to supply the IR sensor (more)
 Option is to use 5 V power adapter to minimize space instead of making our own power
supply that requires a step down transformer; thus using a micro USB cable
URL: https://components101.com/connectors/micro-usb-pinout-datasheet

B. IR Sensor
 We will be using Active IR sensors. Normally, the IR LED transmitter emits IR to the
photodiode receiver. When the light is blocked, there is either an entry or exit.

URL: https://www.arrow.com/en/research-and-events/articles/understanding-active-and-
passive-infrared-sensors

https://electricalfundablog.com/infrared-sensor/

https://circuits-diy.com/ir-detector-project-ir-sensor-photo-diode-circuit/

https://www.electronicshub.org/ir-transmitter-receiver-circuits/

C. Counter
 Using 8051 microcontroller to make a bidirectional up-down counter

URLs: https://drive.google.com/file/d/1_qrLhuiEvll4jMXUMCDWnOnA77EkNlMH/view

https://www.electronicshub.org/bidirectional-visitor-counter-using-8051-microcontroller/

D. Remote
(no definite research yet)

IV. SIMULATION
A. Keil uvison compiler
 To use for programming the 8051 microcontroller
(incomplete codes)

B. Proteus 8 Professional
 To use for simulation
(needs complete codes from uvision)
V. OTHERS
 Calculate and compare energy conserved using the proposed system vs without the system.
(by simulation)

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