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“If you have an oscilloscope, you don’t need to buy a V-I Component Tester. Development based on v0. This is a development of it by using transformers and relays. On this project I used 3V telecommunication relays. Particularly I …

“In this article we will control your high-voltaged Fan with an 2.8 inch TFT Touchscreen (Elecrow & Seeed) and Arduino Mega! We implement a few relays and tranistors to switch high voltages with low currents. I have a particular type …

“Simple and powerful fm radio with easy to find parts. This is a regenerative Fm radio. Build very simple and easy to find parts. No special coils or uhf transistors. Antenna catches fm waves, first transistor works as oscillator. R1 …