We’ve seen networks built over some interesting mediums, but QR codes has to be a new one. [Eric Seifert] decided to try to use QR codes to make an IP connection. He used these visual codes t…

I have a confession to make. I enjoy the challenge of squeezing software into a tiny space or trying to cut a few more cycles out of a loop. It is like an intricate puzzle. Today, of course, there …

[austiwawa] was playing around with one of those simple linear motors people build as friendly little science experiments. There's an AA battery in the middle of a set of magnets. When you put it insi...

We’ve all had that treasured pair of headphones fail us. One moment we’re jamming out to our favorite song, then, betrayal. The right ear goes out. No wait. It’s back. No, damn, i…

Open Source software has been around for decades. Over these decades, Open Source software has been the driving force behind most of the Internet, and all of the top-500 supercomputers. The product…

DC to DC conversion has come a long way. What was once took an electromechanical vibrator and transformer has been reduced to a PC board the size of a largish postage stamp that can be had for a coup...

There are times when you set out to do one thing, and though you do not achieve your aim you succeed in making something else that's just a bit special. [TheKhakinator] sent us something he described...

[Gerald Musy] wanted to investigate the source of electromagnetic interference (EMI) in his switching power supply design. Stymied by the high cost of EMI probes, he decided to build his own. Lucky…

Listen to the amateur radio bands long enough, and you’ll likely come to the conclusion that hams never stop talking. Of course it only seems that way, and the duty cycle for a transmitter op…

It's no secret that we love bizarre robot locomotion, so we are naturally suckers for BALLU (YouTube link, also embedded below) the Bouyancy-Assisted Lightweight Legged Unit. The project started with ...

The Amazon Echo and its diminutive Dot cousin have the handy feature of being able to control some home automation devices. If you own the right manufacturer’s hardware you can bend your home…

Seems like all the buzz about autonomous vehicles these days centers around self-driving cars. Hands-free transportation certainly has its appeal - being able to whistle up a ride with a smartphone ap...

If Babbage had started the computer revolution early, we might have seen a mouse like the one [Peter Balch] created. He started with the guts from a USB wheeled mouse and some gears from an old clo…

Those of you with long memories and a compulsive TV viewing habit might remember [Max Headroom], a quirky piece of TV ephemera from the late 1980s and early 1990s. [Max] was a supposedly computer g…

RC flying is one of those multi-disciplinary hobbies that really lets you expand your skill set. You don't really need to know much to get started, but to get good you need to be part aeronautical eng...

[Dmitry Grinberg] recently bought a Cessna 150 that contained an old IFR-certified GPS from 1996, the KLN89B. The GPS unit contains a database which by law has to be kept up-to-date for IFR flight.…

[Stanley] wanted to make a laser projector but all he could find online were one’s using expensive galvanometer scanners. So instead he came up with his own solution that is to be admired for…

[CNLohr] is kinda famous round these parts; due to some very impressive and successful hacks. However, for his 20k subscriber video, he had a bit to say about failure. Of course glass circuit board…

  [Victor Trucco] makes us wish we spoke Portuguese. He’s done a lot of retrocomputing projects including connecting a ZX81 to the Internet to load programs. The project uses — wha…

It is definitely a first world problem: What do you do when creating a custom pancake requires you to put a design on an SD card and plug it into your pancake printer? This is what was nagging at […