Sensors and Detectors

This one is a special and Simple Skin Biofeedback Circuit which help people learn about skin. It uses sticky pads put on skin to catch small electric signal. Signal change when person feel more calm or is not calm. The circuit show this change maybe with light or sound so person can learn to relax […]

This Pressure Sensor Alarm Circuit talks about one electronic device which can feel when pressure goes up or down. Think of a one special plate like doormat, pressure increases when someone steps on it. Or if there is a change in air pressure inside the machine then this device is capable of knowing that. If […]

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 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 to […]

This 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 cold […]

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 […]