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Circuit Description
The basic principle behind this circuit is sound amplification which is done by using transistors and conversion of sound to electrical energy which is achieved by using a microphone. Once microphone gathers sound it converts it into very low current which has to be amplified. The amplification done by circuit is finally used to trigger a LED.
IC 555 used in this circuit as a mono stable mode. The transistors amplify the signals from microphone and fed them into input of IC, When IC detects the signal it changes its state and activate the output LED.
We should know that it doesn't only work with a clap but any loud sound can trigger this circuit, so be careful while displaying this project in noisy places.
Circuit Diagram
Components Required
1. Transistors-
T1- BC 547
T2- BC 547
2. Resistances-T2- BC 547
R1- 47KΩ
R2- 470Ω
R3- 470Ω
R4- 1KΩ
R5- 4.7KΩ
3. Capacitor- R2- 470Ω
R3- 470Ω
R4- 1KΩ
R5- 4.7KΩ
C1-47µF
C2-100µF
C3-100µF
C4-1µF
4. IC 555 TimerC2-100µF
C3-100µF
C4-1µF
5. LED
6. Condenser MIC
7. 9V DC Battery
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