A few years ago, someone figured out small, cheap ARM Linux boards are really, really useful, extremely popular, sell very well, blink LEDs, and are able to open the doors of engineering and comput…

It’s got a little “Saturday Night Fever” vibe to it, but this pressure-sensitive LED floor was made for gaming, not for dancing. Either way, [creed_bratton_]’s build looks p…

Lots of useful things come in boxes. Shoes, soldering irons and... prime numbers? This simple project from [WhiskyTangoHotel] puts a list of prime numbers in a handy box. Press a button, get a prime. ...

[Netzener] received a Radio Shack P-Box one tube receiver as a gift. However, at the time, his construction skills were not up to the task and he never completed the project. Years later, he did compl...

NASA has a bunch of its 3D models up on GitHub, and if you didn’t know about it before, you do now. It’s a ridiculously large download, at over one and a half jiggabytes, but it’s…

Is it possible to upcycle failed 3D prints? As it turns out, it is -- as long as your definition of "recycle" is somewhat flexible. After all, the world only needs so many coasters.

To be fair, [D...

The Wheatstone bridge is a way of measuring resistance with great accuracy and despite having been invented over 150 years ago, it still finds plenty of use today. Even searching for it on Hackaday…

If you’ve ever tried to tune a PID system, you have probably encountered equal parts overwhelming math and black magic folk wisdom. Or maybe you just let the autotune take over. If you really…

Last time, I talked about a simple kind of neural net called a perceptron that you can cause to learn simple functions. For the purposes of experimenting, I coded a simple example using Excel. That…

We think [Brek Martin] set out to build a handheld GPS and ended up adding an mp3 Player to it. Regardless, it's beautifully constructed. Hand built circuit boards and even a custom antenna adorn this...

Remember Big Mouth Billy Bass? That’s the singing fish with which you could torture family members by having it endlessly perform a rendition of either “Take Me to the River” or &…

Over the last year, Hackaday.io has seen an incredible project. It’s a migratory box of random electronic junk, better known as the Travelling Hackerbox. The idea behind this mobile electroni…

Hearing aids are probably more high-tech than you think. They are tiny. They have to go through a lot of trouble to prevent feedback. They need a long battery life. The good ones match their amplif…

When we think of an old-style computer terminal, it has a CRT screen: either one of the big 1970s VDUs with integrated keyboard, or maybe one from a later decade with more svelte styling. You would…

Remember when it was laser pointers? Well, now it’s drones. [Thinkerer] sent us this link to what’s essentially a press release for a company called Sensofusion that makes a UAV detecto…

If you are a musician and you are also a Hackaday reader, there’s a good chance you’ll own at least one MIDI instrument. A synthesizer of some description, maybe a keyboard, or perhaps …

Mass production was key to survival during the Second World War. So much stuff was made that there continues to be volumes of new unpacked stuff left over and tons of used equipment for sale at rea…

In the 1950s it seemed likely that the Cold War could at any minute take a turn for the worse, and we might all be consumed in the fiery conflagration of nuclear war. Fortunately neither the leaders o...

"The great thing about standards is that there are so many to choose from." Truer words were never spoken, and this goes double for the hobbyist world of hardware hacking. It seems that every module, ...

Back in the olden days, when video games still came on cartridges, the engineers and programmers making these carts had a lot of options. One of the most inventive, brilliant, and interesting cartr…