Crystal radios are old news, but great fun. What would happen if a PhD designed a crystal set? By PhD we mean Pizza Hut Deliveryperson and [John Greenlee] (who may not actually be a PhD of either k…

Before the Commodore 64, the IBM PC, and even the Apple I, most computers took input data from a type of non-magnetic storage medium that is rarely used today: the punched card. These pieces of car…

In this day and age we're consistently surrounded with portable electronic devices. In order for them to be called "portable", they must run on batteries. Most, if not all, use rechargeable batteries....

Hands can grab things, build things, communicate, and we control them intuitively with nothing more than a thought. To those who miss a hand, a prosthesis can be a life-changing tool for carrying o…

If you had told 12-year-old me that one day I would be able to listen to pretty much any song I wanted to on demand and also pull up the lyrics as fast as I could type the artist's name and part of ...

Sometimes you start building, and the project evolves. Layers upon layers of functionality accrue, accrete, and otherwise just pile up. Or at least we're guessing that's what happened with [Varun Kuma...

Rudis - A small wooden sword given to a Gladiator as proof of his achieved freedom. It signifies his ascent from being a slave to becoming a free man.
One thing is certain - anything that runs on el...

Alchemists tried in vain to transmute lead into gold. What if you could turn waste products into energy? That's what [chemicum] did in a recent video--he and some friends built microbial fuel cells t...

So you’ve built a central server and filled your house with WiFi-connected nodes all speaking to each other using the MQTT protocol. In short, you’ve got the machine-to-machine side of …

I caught up with Federico Musto, President and CEO of Arduino SRL, at the 2016 Bay Area Maker Faire. Their company is showing off several new boards being prepared for release as early as next month...

Handheld measuring devices make great DIY projects. One can learn a lot about a sensor or sensor technology by just strapping it onto a spare development board together with an LCD for displaying the ...

A lot of old science fiction movies show people wearing the same--or nearly the same--clothes. We're left guessing if this is because there is a single centralized plant mass-producing skin-tight jump...

It is easy to imagine how early man started using rocks and then eventually developed better and better tools until they created the hammer. Some simple tools took a little longer to invent. The spiri...

LCDs come in a lot of sizes, and there’s a lot written about pushing pixel data out to larger displays. Smaller LCDs, like the 4, 5 and 7 inch variety, aren’t used much, because no one …

[Daniel Perdomo] and two of his friends have been working on a mechanical version of Pong for the past two years. We can safely say that the final result is beautiful. It’s quite ethereal to …

[gutbag] is a guitarist. And guitarists are notorious knob-twiddlers: they love their effects pedals. But when your music involves changing settings more than a few times in the middle of a song, it c...

If you have owned Android phones, there's a reasonable chance that as the kind of person who reads Hackaday you will at some time have rooted one of them, and even applied a new community ROM to it. W...

[Christian] wrote and sells some CAM/CNC controller software. We’re kinda sticklers for open source, and this software doesn’t seem to be, so “meh”. But what we do like is t…

If you can't tell, we're on a roll with 3D printers and printed projects this month. So far, we've covered printers, and simple functional 3D prints. This week we're taking a look at some of the aweso...

Japanese company ALE has been working on a new type of sky show, artificial shooting stars, literally creating an artificial meteor shower at a height of 40 to 50 miles (60 to 80km). The show will be ...