Simple Temperature Meter Circuit is like small detective for heat, as it use special sensor like thermocouple or thermistor to feel heat near it. Here, the 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 […]
Meters and Testers
Simple Fatigue Testing Circuit
This small and simple Fatigue Testing Circuit is a fun way to check whether someone feels tired or not! it makes LED blink very fast and we can change how fast it blink. Also, if we are not tired, we can still see the LED blink even when it flashes fast; however, if we are […]
Thermometer Circuit
Thermometer Circuit is like a small detective for heat, as it has got special sensor which smells temperature and then show on the screen like digital thermometer. Also, 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 […]
Simple TV Remote Tester Circuit
Simple TV Remote Tester Circuit is small tool like a doctor for ones remote, as 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 […]
Electroscope Circuit to Measure Electrostatic Charge
One tool for checking static electricity is Electroscope Circuit to Measure Electrostatic Charge. Static electricity happen when object have unbalanced electric charges and electroscope help to know if static electricity is there and it is how much; as it is just simple conductor. Also, when something touches it, then electroscope charge changes and react and […]
Simple RF Field Strength Meter Circuit
To begin with, 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, also this thing are helpful for radio fans, engineers and new people. Also, they can check how strong signal is in different […]