Meters and Testers

Simple Temperature Meter Circuit is like small detective for heat. It use special sensor like thermocouple or thermistor to feel heat near it. Sensor can be small part or smart chip like LM35 or LM34 which change heat into electric signal. Then circuit take this signal and confirms how much hot or cold it is. […]

Thermometer Circuit is like a small detective for heat. It has got special sensor which smells temperature and then show on the screen like digital thermometer. These circuits come in many shape and size for the use in different way to feel temperature. But no matter which one all of them will indicate which one […]

Simple TV Remote Tester Circuit is small tool like A doctor for ones remote. It uses one infrared sensor like eye for light which we cannot see and to check if remote give signal when one presses the button. If signal arrives small light turns ON or buzzer make beep sound which means remote is […]

One tool for checking static electricity is Electroscope Circuit to Measure Electrostatic Charge. Static electricity happen when object have unbalanced electric charges. Electroscope help to know if static electricity is there and it is how much. It just simple conductor. When something touches it then electroscope charge changes and react. This movement show what charge […]

This Simple RF Field Strength Meter Circuit show how to make device to measure radio wave! Radio and mobile phone both use radio wave and this signal we cannot see. This thing are helpful for radio fans, engineers and new people. They can check how strong signal is in different area. They also can use […]

Seven Segment Counter Circuit is one simple circuit. It count numbers and show on seven segment display. When we press button number goes up by one. It is very easy to make and good for learning how counting works in electronics. What is a Seven Segment Counter Circuit: Seven segment counter circuit is small electric […]