on delay timer circuit

Switch ON Delay Timer circuit

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Switch ON Delay Timer Circuit Diagram

Power ON Delay Timer 

If You Want to switch on any Load After Some Moment Or Some Duration Then You Can Use this Timer Circuit. This is Tested.  Timing Can be Adjusted By Adjustment of Preset. 

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.

2N2222 is more suitable At the place of Q2

Circuit -1

Power ON Time Delay Timer Circuit Diagram For Switch ON Any Load After Some Duration

Parts

IC 555 – 1

Preset 1M- 1

capacitor 2.2uf 63v – 1

0.1uf – 2 or 0.22uf -1

Resistor –

560k- 1

1k-1

2.2k -3

3.3k-1

Diode 1N4007 -1

Relay 12v -1 

transistor- BC548 or 2N2222A – 2

12v DC supply-1

 

Circuit 2

This is a great circuit

ON time delay timer circuit

on delay timer circuit

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

power on delay timer

Both circuits are tested with the 12v supply

Pinout of BC548 and BC547 is same.

BC 547 transistor. Transistor BC547 Pin configuration Diagram2n2222 transistor pinout

Testing Video

Also Read

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8 thoughts on “Switch ON Delay Timer circuit”

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