Electric bill increasing day by day; so we need smart way to measure power use. Here is a simple project using Arduino UNO, ACS712 current sensor and 16×2 LCD with I2C and it shows real time current, voltage and power. Also, this project for Smart Energy Meter Circuit with Arduino UNO help to monitor load […]
Meters and Testers
Digital Display AC Line Tester Circuit
The Digital Display AC Line Tester Circuit is a compact electronic device that detects the presence of mains AC voltage without direct contact, it operates wirelessly, making it a safe and convenient mains voltage tester. When the sensing probe comes near a live AC wire then the circuit detects the field and shows the count […]
Simple Humidity Level Detector Circuit
Humidity is presence of water vapor in air or soil, also too much or too less humidity is harmful for plants and for storage; so we need a Simple Humidity Level Detector Circuit. This small circuit uses only a few components and provides an LED indication when the humidity crosses a preset level and we […]
Simple 555 Timer Based Time Sense Tester Circuit
Simple 555 Timer Based Time Sense Tester Circuit is fun and easy to make, it uses IC 555 and make time delay, so press one switch and start timer. Then guess time presses second switch and it stop and then LED show result and it is good for learning how brain feel time. Also, circuit […]
Measuring RPM with a Tachometer Circuit
A tachometer measures how fast a motor shaft or disk rotates and it displays the speed in RPM (revolutions per minute). This article for Measuring RPM with a Tachometer Circuit teaches us how simple tachometer circuit made, how it work and how to build it. Also, tachometers play an important role in industries, automobiles and […]
Sound Pressure Level Meter Circuit using IC CA3140
Sound Pressure Level Meter Circuit using IC CA3140 is device to check how loud sound is in one place, also it shows sound level with visuals. Furthermore, the circuit is useful for audio testing, noise check and sound work and it shows simple way to make it using condenser mic, op-amp and FSD meter for […]