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.

Discover how to build a simple wireless power transfer system at home using readily available components like enameled copper wire, an LED, a 2N2222A transistor, and a 9V battery. This step-by-step ...

In this project, I'll make a small circuit capable of blinking lights, on its output we get a digital signal that we can use ...

Build festive decorations using Arduino and Raspberry Pi with these five creative holiday projects and video tutorials ...

LED lightbulbs are supposed to last thousands of hours, so how come some of them stop working so fast? The answer might be in ...

DIY Ram-Tester checks vintage 16- and 20-pin DRAMs used in TI-99/4A, C64, Amiga, Atari and others. Fast tests, OLED display, ...

Tis the season to get the perfect gift. It could be for your nerdy self or even your geeky friends. I have ideas.

Tis the season to get the perfect gift. It could be for your nerdy self or even your geeky friends. I have ideas.

Each robot costs only a single penny to manufacture. The robots could help advance everything from nanotechnology ...

Whether you prefer a casual walk or a drive-thru experience, our map makes it easy to find Christmas light displays around ...

It can be tempting to leave outdoor Christmas lights on all night to make your house look lovely throughout the entire month.

Even dead batteries often have a little power left in them. It's a bad idea to repurpose them into crafts because of some ...