Clap switch making diagram

Here is a hobby circuit for Electronics hobbyists that can switch on & off Light, Fan, Radio etc. by the sound of clap. The sound of clap is received by a small microphone that is shown biased by resistor in the circuit. The microphone changes sound wave in to electrical wave which is further amplified by transistor. Transistor is used as common emitter circuit to amplify weak signals received by the microphone. Amplified output from the collector of trensistor is then feed to the Bistable Multivibrator circuit also known as flip-flop circuit.


Circuit Diagram of Clap Switch:

Parts list:

Resistors


R1=15KΩ,R5,R6=1.5KΩ

R2,R11,R12=2.2MΩ,R13=2.2KΩ

R3=270KΩ,R4=3.3KΩ

R7,R8=10KΩ,R9,R10=27KΩ

Capacitors: 

C1= 1000µf/16V
C2.01µf,C3,C4=.047µf

Semiconductor:

Q1,Q2,Q3=BC548, Q4=BC368

D2,D3,D4=IN 4148  

D1,D5=IN 4007, 

Others:
 
T1=12V/500mA X-former

Mic=Condenser Microphone

K1=12vRelay,B1=Bulb or Load. 

Complete circuit you see :--------