Hey Friends its summer here and temperatures rising as high as 45 degree To 50 degree celsius.. coolers are out. 

In the Cooler water is carried on from a lower tub to an upper tub for draining it on to a special grass fixed on the walls, now this requires a pump of 50 watts at least and it consumes more energy and water if running continuously.

So I design this automatic cooler pump controller circuit or you can say this is a delay auto on-off timer circuit.