Sensors and Detectors

This post is for Broken Cable Detector Circuit using IC CD 4069. In this circuit there is no need to open wire to check. It work like metal finder but find AC current in wire but not in metal. It uses chip CD 4069 and this chip has small switches to turn ON light or […]

555 IC is used in this TV Remote Signal Jammer Circuit. It makes fake IR signals same as remote so TV get confused. TV can not get the real remote signal. We can watch the show without anyone changing the channel. Parts used to complete this circuit are IR LED, ceramic capacitor, NPN transistor, potentiometer, […]

This is Simple Metal Detector Circuit using IC 555 It uses IC 555 chip which works like small clock and makes signal to help find metal and magnet It is easy to build and good for beginners. Circuit Working: Parts List: Component Type Value Quantity Resistor (1/4 watt) 47k 1 Capacitors Electrolytic 10μF 25V 1 […]

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 […]

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: […]

Imagine a disco party but with no flashing lights! This Sound to Light Converter Circuit changes sound to light. It hears music and make lights flash with beat. Smart parts inside change sound volume or pitch to light brightness or speed. Circuit Working of Sound to Light Converter Circuit using Piezo: Parts List: Category Component […]