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 […]
Meters and Testers
Digital Thermometer Circuit using Arduino and IC LM35
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 […]
Function Generator Circuit using IC L8038
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 […]
How To Test a Multi-Core Wire using Cable Tester Circuit
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 […]
Tachometer Circuit
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. […]
Cable Tracer Circuit
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 […]