Clap Switch Circuit Diagram and Its Working

An electronic device that can be turned on and off by a clap is called a clap switch. It can control light appliances by users’ clapping action also. It was invented by Stevens, R. Carlile, and E. Dale Reamer in 1996. The main advantage of this circuit or device is that it is mainly helpful for a mobility-impaired person. The condenser mic is one of the main parts of the circuit that takes input clap sound based on the pitch of the clap. This article gives an overview of the clap switch. Electrical pulses are the desired input to the clap switch circuit.

What is Clap Switch

Definition: A clap switch is an electronic circuit or device that controls electrical appliances like tube lights, energy savers, LED bulbs, etc. with user clapping action. It is mainly useful for a person who cannot move from one place to another for switching on or off electrical or electronic appliances. Clap switch circuits can be designed in a variety of ways. Nowadays electronics students are designing this circuit by using the decade counter IC 4017.

Circuit switch Circuit Diagram

This is a very simple circuit; you can change its design according to your requirements.

These sound vibrations are given to the base point of transistor BC 557 (a PNP transistor). It amplifies the sound collected by the mic. The transistor collector point is connected with IC point 14, which is the clock point. When clock e is received from amplifier transistor BC557.

IC 4017 is a decade counter IC, which is wired as a toggle switch. That its outputs 1 and 2 become high and low when the input pin 14 receives pulses. Output4 (pin4) is connected to the reset pin 15 so that further counting is restricted. The high output from IC 4017 passes through a resistor to the base of switching transistor BC557. When BC557 conducts, the red LED (indicator LED) turns on. A 6V 100-ohm relay is connected to the points marked (A and B), the relay is turned on, and 220V AC passes through the relay and bulb or any other electrical appliance. Switched on. In the next clap, output pin 2 becomes low, and the relay and indicator LED switch off.

PART LIST For Clap switch circuit

Prototyping board (roughly 1″ by 1″) or breadboard.
9v connector
BC 547 transistor (npn)
BC 557 Transistor (pnp)
IC 4017
22k resistor
470 ohm resistor
1k resistor
6v relay
9v battery

Advantages

The following are the advantages of clap switch:

It is reliable and low-cost circuit
It is an advantageous technology for mobility-impaired persons.
Automatically controls lights within a specified range by clapping action
It provides good output efficiency and can control high load.

Disadvantages

The following are the disadvantages of a clap switch:

The filter should be added in the circuit compulsorily for working.
It is cumbersome compared to a traditional control switch, and it can be operated even by an unknown person.

Applications

The following are the applications of a clap switch:

to on or off LED light
Air conditioners
Tv
Motor, etc.

FAQs

1). Who invented the clap switch?

The main founder of this idea and circuit was R. Carlile Stevens.

2) When it was invented

The first clap switch circuit was invented in Feb 1996

3). Name two main applications of the Clap Switch.

The two main applications are

LED light
Fans

4). Is the Clapper a fire hazard?

No, the Clapper is not a fire hazard; it’s safe.

5). What is the main principle of a clap switch?

A clap switch converts sound energy into electrical pulses as input to the circuit and provides an output in order to control light appliances.

6). Can it work by all persons’ claps?

Yes, normally it can operate by the claps of all persons, but you can specify its working, like it will work with 2 or 3 claps or be turned off by 2 or more than 2 claps.