Christmas come one time in a year and it brings big joy. Simple Christmas Series Lights Tester Circuit is simple design. It checks and fixes problem in series Christmas lights. These lights are used for holiday decorate. If one bulb stops then all lights go OFF. One bad bulb break the whole circuit and makes […]
Meters and Testers
Building a Simple Pulse Frequency Counter Circuit with Arduino
Pulse frequency counter count signal in hertz (Hz). It is an important tool in electronics. Now Arduino and other microcontroller make counter easy and cheap. This article for Simple Pulse Frequency Counter Circuit with Arduino show how to make this easy circuit with few parts. We have used IC 555 to make pulse, IC 7809 […]
Simple Op-amp IC Tester Circuit
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 […]
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 […]