Clap Switch Circuit using IC 4017 turns on ON or OFF with a clap sound. It uses speaker as microphone. Speaker and microphone are built same way so speaker can work like microphone in this circuit. Circuit Working: Parts List: Component Type Value Quantity Resistors (All resistors are 1/4 watt) 3.3k 1 470k 1 470Ω […]
Simple Mains Phase Detector Circuit using CMOS ICs
This article talks about two easy and Simple Mains Phase Detector Circuit using CMOS ICs like IC 4001 and IC 4060. They find if mains AC 220V or 120V is present in air. No need to touch the mains. Circuit uses antenna to feel mains power in air. Circuit Working (using IC 4001): IC 4001 […]
Intercom Circuit
Intercom Circuit is like smart walkie talkie for home use. No need of button it work hands-free with electronics. We talk in mic and it changes voice to electric signal. Amplifier make signal strong. One part stop our own speaker sound, so there is no echo or noise. Same signal goes to other unit and […]
Simple IC 555 Oscillator Circuits
Simple IC 555 Oscillator Circuits is a 555 timer chip which common and easy to use. It is good for many projects. But for some circuits we must know how it works when not active. Two main pins: IC 555 Pinouts Here is a list that shows what each pin on the chip does. IC […]
Simple Phone Transmitter Circuit
Simple Phone Transmitter Circuit uses few parts. It take sound from phone talk and changes to signal. Signal goes far using antenna. This circuit is easy to make and works well with landline phone. Circuit Working: Parts List: Category Description Quantity Resistors 10k, 47k, 330Ω (1/4 watt each) 1 each Capacitors Ceramic 47pF 3 Semiconductors […]
Mobile Phone Detector Circuit using Transistors
Imagine we have a spy device that finds nearby mobile phones. Mobile Phone Detector Circuit using Transistors is like ear for special signals phones send to towers. It can catch signal even before phone rings like secret talk between phone and tower. It uses transistors, small switches to catch these signals. Circuit Working: Parts List: […]