Lamp Flasher using NE 555
This is the circuit diagram of lamp flasher operated from mains. By this you can flash up to 200 Watt lamps at rates determined by you. IC NE555 is wired as an astable multivibrator for producing the pulses for flashing the lamp. The flashing rate can be set by the value of resistors R2 & R3.
Diodes D1 & D2 provides a half wave rectified regulated supply for the IC. Transistor T1 is used to drive triac and triac BT136 for driving the load. Resistor R4 limits the base current of Q1.
Flashing Circuit Diagram & Parts List
- Assemble the circuit on a good quality PCB or common board.
- Connect a 100K pot instead of R2 if you need frequent changes in rate.
- Many parts of the circuit are live with potential shock hazards.So please be careful.
- As usual use an IC holder for mounting the IC.
The above circuit had some mistakes which has been corrected by Mr. Seetharaman. Take a look at the circuit below.
We have more related lamp flasher circuits in our website, Take a look:
5. Mini Flasher