DIY Club

  Project 3: DIY Clap Switch Circuit Objective: To build a clap-controlled switch that turns ON an LED or appliance with a clap and turns it OFF with another clap. This is a simple sound-activated switch using a microphone and transistor . Components Required: Condenser Microphone NPN Transistor (BC547) Resistors – 1kΩ, 10kΩ, and 100kΩ Capacitor – 10µF Relay Module (for high-power devices like bulbs) LED (for testing) Battery – 9V Diode – 1N4007 (for relay protection) Breadboard & Wires Circuit Diagram: (You can visualize this using Fritzing, Tinkercad, or other circuit design tools.) Step-by-Step Instructions: Step 1: Connect the Microphone Place the condenser mic on the breadboard. One pin of the mic connects to +ve power through a 10kΩ resistor . The other pin connects to ground (-) . Step 2: Connect the Transistor The microphone output is connected to the base of BC547 transistor via a 1kΩ resistor . The emitter of the transistor goes to ground (-) . Step 3: Conne...