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Electrical Load Life Cycle Tester

This document describes a system that uses a microcontroller and keypad to set a countdown number from 999 to 0. As the number counts down each second, a relay switches a load such as a light bulb on and off to test its life cycle. The system is intended to test the life cycles of electrical loads like lamps and motors in an industrial setting. It allows entering the desired number of on-off cycles and displays the countdown.

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386 views4 pages

Electrical Load Life Cycle Tester

This document describes a system that uses a microcontroller and keypad to set a countdown number from 999 to 0. As the number counts down each second, a relay switches a load such as a light bulb on and off to test its life cycle. The system is intended to test the life cycles of electrical loads like lamps and motors in an industrial setting. It allows entering the desired number of on-off cycles and displays the countdown.

Uploaded by

TRIAD TECHNO SERVICES
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 DOC, PDF, TXT or read online on Scribd
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LIFE CYCLE TESTING OF ELECTRICAL LOADS BY DOWN

COUNTER

ABSTRACT:

A desired number is entered through a keypad interfaced to a microcontroller of 8051

family. Upon activation, the system counts down one in each second till the set number reaches

zero. A relay switches the load ON & OFF for every count thus testing the life cycle of the

product.

The working life of many products such as lamps depends on the number of ON/OFF cycles it

encounters. This project is designed to be used in industries for testing the life cycle of such

electrical loads (lamps, motors etc) using a down counter.

This proposed system uses microcontroller of 8051 family with a keypad interfaced to it to

enter a required number. 7-segment displays are used for displaying the number /count. Once the

circuit is powered, the counter is set using the keypad to count down anywhere from 999 to 0.

The counter starts decrementing from the set number to 0 per each count and simultaneously

making the load (i.e. bulb in this circuit) turn ON and OFF by a relay. Reaching the zero count it

finally remains OFF.

The project can be further enhanced by using mono stable triggering device to stop the

counter in the event of failure of the load before reaching the zero. Thus the exact life cycle of

the load can be estimated.


BLOCK DIAGRAM:

8
16X2 LCD
0

1
KEYPAD
SERIES MC

RELAY LOAD
DRIVER
CIRCUIT

POWER SUPPLY:

STEP DOWN BRIDGE FILTER REGULATOR


TRANSFORMER CIRCUIT CIRCUIT

Power to all sections


HARDWARE REQUIREMENTS:
 8051 series Microcontroller,
 Keypad,
 7 Segment Displays,
 Lamp,
 Transformer,
 Voltage Regulator
 , Diodes, Relay, Transistor,
 Crystal, Resistors,
 Capacitors,
 LED,
 Switch etc.

SOFTWARE REQUIREMENTS:
 Keil compiler
 Embedded C or Assembly.

ADVANTAGES:
 Highly sensitive
 Visual identification with LED
 Low cost and reliable circuit
 Sensitivity can be adjusted
 low power consumption
 It is operated with 5v dc supply
APPLICATIONS:
 Industries,
 Offices,
 Hotels,
 Banks
 HOMES etc.

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