555 Timer Ic For Cooler Pump Auto On Off 

555 timer ic circuit is going to tern my cooler pump auto on and off every 4 min.
it will save water and electricity.
in this circuit diagram i used
555 timer ic,
5v power supply,
5v relay high level trigger,
capacitor 16v 2200uf
resistor 100k pin 6 to 7
resistor 230ohm pin 7 to 8.

Наука