A static electricity detector is like an alarm for electricity that builds up on objects like your clothes. This can happen when you rub things together. This kind of electricity can damage delicate electronics, so this detector is helpful around them. The detector has a special sensor that can feel these electrical changes in the […]
Sensors and Detectors
Simple Heat Sensor Circuit using a Single Transistor
This simple heat sensor circuit uses just one transistor and a special resistor that acts like a thermometer. As things heat up, this resistor changes its behavior, which the transistor picks up on. Depending on the temperature, the transistor acts like a gatekeeper letting electricity flow through or blocking it completely. This way, the circuit […]
Simple Touch Controlled Potentiometer Circuit
This touch controlled potentiometer circuit lets you control things with just a tap. Forget fiddling with knobs or sliders simply touch a sensor to adjust resistance or voltage. It uses something called “capacitive sensing” which basically means your body acts like a switch when you touch the sensor. Pretty cool, right? Circuit Working: Parts List: […]
Simple Thunder Lightning Detector Circuit
This circuit explains how to construct a lightning detector a tool which is used by storm chasers! A special kind of energy is created in the sky by lightning. When a storm occurs this circuit detects the electricity and alert users by lighting up or emitting a sound. As a result one can get more […]
Simple Mobile Phone Detector Circuit using Op-Amp
Here is how to construct a circuit that can detect mobile phones in the area. It can detect the invisible radio signals that cell phones produce when they are turned ON and alert them if someone is using a phone in private places like a conference room or a library where they should not be. One […]
Simple Anti Corrosion Free Liquid Level Sensor Circuit
This circuit teaches how to construct a sensor that measures the level of liquid in a tank or other container. By delivering a small electrical signal it uses specific probes to detect whether liquid has touched them. This circuit design uses no harsh chemicals which helps avoid corrosion. Circuit Working: Parts List: Component Quantity Resistors […]