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
No comments:
Post a Comment