![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiEVVYFReVBsZ5gvWmXYUFBjGaFHQ40EhjxUP1x-h4xipb3mvLAATPR0-J7jHA89BSYV7kCOskWhwOzkM4_Y7zzj5cMwtbVdWxb1RqnW-Lc2PtTvDnEFvQ_slvinURCL87Qah9vEgjhY6ZS/s320/clap_switcha.gif)
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=15K
Ω,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 :--------
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