Introduction: Two Transient Clap Switch Circuits

Transient Clap Switch Circuit is the circuit which turns ON with a clap sound. The output remains ON for some time and then turns OFF automatically.

The time of activity can be controlled by varying the value of capacitance of Capacitor. More the capacitance, more is the time for which the output remains ON.

A condenser microphone is used as a sensor. The trigger can be clap/snap or any other sound capable of activating the circuit.

Here, I will show you two different ways to make transient clap automated circuit :

  • Using 555 Timer IC
  • Using Transistors

Step 1: Circuit Diagram

These are the circuit diagrams for making circuit using :

  • 555 Timer IC
  • Transistors

Step 2: Components

These are the Components Required for making circuit :

1. Using 555 Timer IC

• 555 Timer IC

• Condenser Microphone

• Transistor: BC547

• Resistors: 100K, 47K, 1K, 330Ω

• Capacitor: 10 μF


2. Using Transistors

• Transistors: BC547 (2)

• Condenser Microphone

• Resistors: 1M, 10K (2), 330 Ω

• Capacitor: 47 μF


Other Requirements:

• Battery: 9V and battery clip

• Breadboard

• Breadboard Connectors

Step 3: Step-by-step Tutorial