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Meters and Testers

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Simple Op-amp IC Tester Circuit

Last updated on 30 July 2025 by Admin-Lavi Leave a Comment

Op-amps (operational amplifiers) are very important in electronics. They are used for filtering, amplify signals and analog signal work. Before using op-amp IC we must test it to ensure it works good and correct. To check op-amp fast and easy we have made a Simple Op-amp IC Tester Circuit Op-amp is like voltage comparator and […]

Filed Under: Meters and Testers

Digital Thermometer Circuit using Arduino and IC LM35

Last updated on 28 July 2025 by Admin-Lavi Leave a Comment

This project make digital thermometer using IC LM35 sensor and Arduino. Arduino reads voltage from LM35 and changes it to temperature number. People use thermometer for long time to check temperature. Temperature show on small LCD screen for easy see. With Arduino we can build thermometer that show real-time temperature on screen. It can be […]

Filed Under: Arduino Projects, Meters and Testers

Function Generator Circuit using IC L8038

Last updated on 27 July 2025 by Admin-Lavi Leave a Comment

Function Generator Circuit using IC L8038 is chip makes sine, square and sawtooth wave. It changes frequency using outside capacitor and resistor from 0.001Hz to 300KHz. Can change and sweep frequency with outside voltage. Gives strong and clean output and make all 3 waves of same time. Need few extra parts and work stable in […]

Filed Under: Meters and Testers, Oscillator Circuits

How To Test a Multi-Core Wire using Cable Tester Circuit

Last updated on 13 August 2025 by Admin-Lavi Leave a Comment

We can learn How To Test a Multi-Core Wire using Cable Tester Circuit through this tutorial. This tool check if cable is working or not. It find wrong connection like short or broken wire. Circuit is good for multi-core cable with many wires inside. It help check all wires are okay. We can also use […]

Filed Under: Meters and Testers

Tachometer Circuit

Last updated on 24 July 2025 by Admin-Lavi Leave a Comment

This easy to build Tachometer Circuit is a small DIY tool to check speed of rotating shaft or disc. We use tachometer to know how fast shaft or wheel spin in RPS (revolutions per second). This simple circuit uses two 7-segment displays and one slotted opto sensor MOC7811 where all parts are easy to find. […]

Filed Under: Meters and Testers

Cable Tracer Circuit

Last updated on 18 July 2025 by Admin-Lavi Leave a Comment

Cable Tracer Circuit is of two part device. It help find and check right cable in group or inside wall. It have two parts: transmitter and receiver. People use it in telecom, network, fixing wires, security system and audio/video setup. Circuit Working for Cable Tracer Transmitter Circuit: Parts List: Category Component Quantity Resistors 2.2k 1/4 […]

Filed Under: Meters and Testers

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