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 […]
Simple High Voltage Generator Circuit
This article will show you how to build a special kind of generator that makes super high frequency electricity. This lets you do experiments that would not be possible with normal power supplies. One cool thing about this high frequency electricity is that it mostly stays on the surface of your skin if you touch […]
500 Watt Induction Heater Circuit
This is a guide for a 500 watt induction heater. It uses a coil to make a strong magnetic field that changes very quickly. When you put metal in the coil, it makes the metal heat up. This happens because of swirling currents in the metal called eddy currents. There is another effect from the […]