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 […]
Stun Gun,Taser Gun Circuit
Stuns, also sometimes called tasers, use a strong electric shock to stop an attacker. This shock is meant to be painful and scary not deadly. A short shock can make an attacker lose control of their muscles for a few seconds. This gives you time to get away. A longer shock more than a second […]
Illuminate LEDs with 1.5V Battery using this Joule Thief Circuit
This is a circuit that can make an LED light up from a dead battery! It works with white, blue and even ultraviolet LEDs, and all you need is a battery that’s almost empty at least 1.2V. The cool thing is, the LED can even light up with just a tiny bit of power left […]
Simple 220V SMPS Circuit using One Transistor
This guide shows you how to build a simple power supply circuit that plugs into the wall outlet 220V and uses only one transistor MJE13005. It does not need any fancy chips or extra parts to control the power. Instead of those parts, it uses a special diode and a winding on the transformer to […]
5 Watt LED Driver Circuit (SMPS)
This post shows you how to build a power supply to directly power bright LEDs from your wall outlet. It is made especially for white LEDs, but it can also work with other colors like blue, green, red, yellow and even ultraviolet UV. What is a 5 Watt LED Driver Circuit: A 5 Watt LED […]