Circuit Diagram Time Delay Relay. It also has a potentiometer to adjust the time delay where you can increase of decrease the time delay by just rotating the potentiometer. A time delay relay consists of a normal electromechanical relay along with a control circuit to control the relay operation and timing.
Note that the user must provide the voltage to power the load being switched by the output contacts of the time delay relay. They are represented by the dotted lines in the wiring diagrams. When switch off this circuit the capacitor is discharged and it ready for next time to provide delay time.
It also has a potentiometer to adjust the time delay where you can increase of decrease the time delay by just rotating the potentiometer.
Newer designs of time delay relays use electronic circuits with resistor capacitor rc networks to generate a time delay then energize a normal instantaneous electromechanical relay coil with the electronic circuit s output. A time delay relay consists of a normal electromechanical relay along with a control circuit to control the relay operation and timing. If you want more time duration then connect more that 2200uf value capacitor or connect more with parallel. I suggest using a small size pcb relay of 12v 20a.
