Electronic Timer Switch Circuit Diagram. Here a relay is used to switch the load for certain amount of time. On off switch circuit using a 555 timer.
With the parts shown in the diagram. For example a 1000uf capacitor can give around 2 5 minutes time delay. For 5 min 10 min and 15 min you just have to change the resistor value r 1.
This circuit to control a relay which will power heated mirrors in my car.
The 555 adjustable timer circuit starts timing when switched on. Here a relay is used to switch the load for certain amount of time. This timer circuit is designed to switch on a 12 v load in a solar powered installation for a preset period at the press of a button. On off switch circuit using a 555 timer.
