This article shows you how to build a powerful inverter that changes car battery power 12V to household current 230 using a modern chip called the IR2153. This chip is better than older designs because: Components needed to build this 500 watt inverter: You can also change the settings on this inverter to use less […]
Simple ESR Meter Circuit
This article shows you how to build a tool to check capacitors in things like computers and phones. A capacitor is like a tiny battery that stores electricity. This tool, called an ESR meter, helps you find bad capacitors without removing them from the circuit board. The meter uses a common chip called a 555 […]
Simple TV, Video Transmitter Circuit
Have you ever wanted to build your own mini TV station? This guide is for hobbyists who want to make a simple transmitter to broadcast videos inside your house. The transmitter uses a special coil and capacitor to pick a channel between 37 and 50 on the old fashioned TV dial UHF band, 470 to […]
220V Power Line Communication Remote Control Circuit
Our houses already use electricity to carry signals besides just power. This post shows you how to build a remote control that uses the electricity in your walls 220V to send signals. It works for short distances inside your house or apartment because the signal is at a much higher frequency 5 kHz than the […]
Simple FM Transmitter Circuit (100 meters range)
Want to make your own mini radio station? This guide shows you how to build a simple FM transmitter that works between 87.5 and 108 MHz on the FM dial. This transmitter uses a basic circuit with a special transistor and an antenna to broadcast your signal. It is different from other small transmitters because […]
Simple LED Strobe Light Circuit
This guide shows you how to build a flashing LED light strobe light using a common chip called the IC 555 . Some knobs and resistors control how fast the light flashes and how bright it is. Another resistor controls how much power goes to the LEDs. This project uses a special switch that can […]