Sensors and Detectors

Simple Vibration Sensor Circuit is like small touchy friend for electronics. It is felt when we shake or quick move happen and then it sends the electric signal. This is good for use in thief alarm to feel someone come in or for earthquake to feel ground move. Also we can use it in factory […]

This Simple Line Following Robot Sensor Circuit work like robot eyes for follow line. It uses special sensor called IR or infrared to see black line and white ground. These sensor are like small light but light is invisible. Circuit look how much light come back then know where line is. Then this information goes […]

This Simple Heat Sensor Circuit using Piezo Transducer is like small detective for heat. It uses special thing called piezo transducer which work like tiny electricity maker. When it get hot or cold it presses itself little bit and make small electric shock. The circuit look at this shock to know how much hot or […]

In this post we will see how to make Simple Contactless 220V Phase Detector Circuit using IC 4017 This small tool help to check wire or cable if current is inside or not without touching it. Very useful for electrician to find problem in big electric system. If current is there in wire the light […]

Simple Storm Detector Circuit is like small weather magic in box. It can feel lightnings electric noise which shows storm is coming near. This circuit uses one antenna to catch small signal in air like small radio. But signal being weak it uses amplifier to make signal strong. Sometimes it also uses special filter to […]

Radiation sensor circuit is like small spy for rays which one cannot see. It can smell different radiation like from light bulb, electromagnetic, or X-ray (ionizing one) etc. This circuit have special sensor when radiation detects sensor feels it and send signal. The circuit then uses that signal to modify things such as showing a […]