These light up paper circuit cards were much easier to make than I expected and only need a few inexpensive materials.

A blast from the Elektor archives: this 1998 battery tester uses a simple LED display to reveal a battery’s true condition under load — even below 1 V.

Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch ...

This is a diy simple stun gun circuit showned only for learning! In No Way Do I Recommend Building these Stun-Guns or the actual use of them for any purpose what so-ever. We will present more stun gun ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Simple projects like this winking rabbit are a great way to start ...

Today, there are dozens of off-the-shelf solutions for a GPS tracking device. Most of them use GSM, some of them use satellites, and all of them are astonishingly inexpensive. If you want to track a ...