on delay timer circuit

This circuit is very useful in the Protection of Any Load. A Device Can be Damaged By the Sudden Unstabilized Current or Voltage flow Through Whole Circuit. Sometimes Mains Voltage Take Some Moment to Stabilization. 

So If You Connect a Delay Timer, the Timer Stops The Current Flow For A Fix Duration, and After That, It Allow To Pass The Current.

Parts

IC 555 -1

Bridge rectifier -1

capacitor

1000uf 25v -1

100uf 25v -1

Resistor 1k- 1,   56k -1

transistor 2N2222A- 1

Relay 12v -1

Diode 1N4007 -1

12-0-12v step-down transformer (500ma or 1A)-1

For more projects on Delay timer click here

Click here for the Testing video of delay timer circuit