This article for Simple Logic Probe Circuit using Transistors tell how to make one useful tool called voltage tester. It uses two transistors for checking if some place in circuit have positive voltage. When it find electricity it makes beep sound and small light turns ON. People who want to learn electronics, this tool will […]
Meters and Testers
Tester Probe Circuit
Many people think multimeter can test any electric part. But this not always safe especially for semiconductor. This article for Tester Probe Circuit show how to make one easy and safe tester only for semiconductor. This tester is easy to build and uses small current which is good to test many type of semiconductor. What […]
Crystal Tester Circuit
Did anyone ever think how quartz watch or radio keep time so good? It uses one special thing called crystal oscillator. This post for Crystal Tester Circuit show how to make small tester to check if crystal is working or not. Tester are made with simple parts like transistor, resistor and capacitor. WARNING: Making electric […]
Continuity Tester Circuit
This Continuity Tester Circuit uses two transistor like small switch for checking wire is good or bad and for that we just need a battery and one LED light. Here, one side touches to battery other side touches the wire and if wire is okay, then current connects through and light will ON, that mean […]
Simple ESR Meter Circuit
To begin with, this article for Simple ESR Meter Circuit show how to make one tool for checking capacitor in phone, laptop and other device. Capacitor work like small battery and it keep some power inside, also we can find bad capacitor without removing it from circuit board and for that we need to use […]