Timer Switch Circuit Diagram for Light

Timer Switch Circuit

Here a simple circuit diagram of a Timer switch circuit is given. The required components are given below,

Components	Rating	Quantity	Indicated In the Circuit diagram
PN Junction Diode	1N4001	1	D1
Push Button Switch	NO (Normally Open) switch	1	S1
Resistors	210E	1	R1
Capacitor	470 microfarad, 25V	1	C1
Potentiometer	100K	1	P1
Resistor	10K	1	R2
NPN Transistor	BC547	1	T1
Resistor	12K	1	R3
Resistor	270E	1	R4
LED	3V	1
NPN Transistor	BC337	1	T2

Circuit Diagram:

When the push button switch is pressed the LED will be glow for a time duration. The glow time can be increased or decrease by the Potentiometer.

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