# How to Make Clapping Switch Circuit

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Hii friend,

Today I am going to make a circuit of clapping switch.when we will clap then LED will glow.This circuit is amazing.To make this circuit I will use LM555 IC and C945 transistor.

Let's get started,

### Teacher Notes

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## Step 1: Take All Components As Shown Below

Components required -

(1.) IC - LM555 x1

(2.) Microphone x1

(3.) Battery - 9V x1

(4.) Battery clipper x1

(5.) Resistor - 100K x1

(6.) Resistor - 1K x1

(7.) Resistor - 56K x1

(8.) Capacitor - 25V 10uf x1

(9.) Transistor - C945 x1

(10.) LED - 4V x1

## Step 2: Circuit Diagram

Connect all components according to the circuit diagram.

## Step 3: Connect Pin-4 and Pin-8 of LM555 IC

Firstly we have to connect pins of LM555 IC using jumper wire.

connect pin-4 and pin-8 of LM555 IC as picture.

## Step 4: Connect 10uf Capacitor

Next connect +ve pin of 10uf capacitor to pin-6 & pin-7 of the IC and

Connect -ve pin of 10uf capacitor to pin-1 of the IC as shown in the picture.

## Step 5: Connect 100K Resistor

Connect 100K resistor between pin-8 of IC and +ve pin of capacitor.

## Step 6: Connect C945 Transistor

Next solder emmiter pin of transistor to pin-1 of LM555 IC and

Collector pin of transistor to pin-2 of LM555 IC as you can see in the picture.

## Step 7: Connect 1K Resistor

Solder 1K resistor between pin-2 and pin-4 of the IC as shown in the picture.

## Step 8: Connect 56K Resistor

Now connect 56K ohm resistor between base pin of transistor and pin-4 of LM555 IC as solder in the picture.

## Step 9: Connect Wires of LED

Solder +ve wire of LED to pin-3 of LM555 IC and

solder -ve pin of LED to pin-1 of the IC.

## Step 10: Connect Battery Clipper Wire

Next connect +ve wire of battery clipper to pin-4 of the IC and

-ve wire to pin-1 of the IC as solder in the picture.

## Step 11: Connect Microphone

Now we have to connect wires of microphone.

Solder +ve wire of microphone to base pin of transistor and

-ve wire of microphone to pin-1 of the IC.

## Step 12: How to Use This Clapping Circuit

Connect battery to the battery clipper and clap towards microphone then we will observe that when we are clapping then LED is glowing.

This type we can make clapping circuit using LM555 IC and C945 transistor.

If you want make more electronic projects like this then follow utsource now.

Thank you

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## 3 Discussions

Hi !
Nice work!
Do you think that other NPN transistors would work? With similar or close current and voltage characteristics ?

Brings back memories of the commercial from the late 80's early 90's : The Clapper. A light bulb that would turn on and off at a clap.. Clap on . . Clap off . . The clapper. :)