[NightHawkInLight] a.k.a. [Ben] recently built an awesome high power air cannon out of PVC pipe. PVC air cannons are great, and everyone should build one of these at some point in their life, but w…

Stirling engines are really cool machines, invented by Reverend Dr. Robert Stirling in 1816 to rival the steam engine, they are one of the most efficient engines ever conceived.  Building one is a …

There’s a big to-do going on right now in Germany over particulate-matter air pollution. Stuttgart, Germany’s “motor city” and one of Dante’s seven circles of Hell dur…

Is there room on Mars and Europa for cute robots? [NASA] -- collaborating with [UC Berkley] and [Distant Focus Corporation] -- have the answer: PUFFER, a robot inspired by origami.

PUFFER -- which ...

Reader [Jasper] writes in with glowing praise for the TFT_eSPI library for the ESP8266 and the various cheap 480×320 TFT displays (ILI9341, ILI9163, ST7735, S6D02A1, etc.) that support SPI mod…

Whether you're selling a product or just showing off your latest project, a photo turntable makes video shots a lot easier.  360° turntables allow the viewer to see every side of the object being ph...

The Hackaday Prize is in full swing, and that means we're starting to see all the builds a few select people have been saving up for the past few months. [yowhwui] has been working on a 3D printed ele...

There is a new class of virii in town, specifically targeting Internet of Things (IoT) devices. BrickerBot and its variants do exactly as their name says, turning your smart devices into bricks. So…

Always one to push the envelope, U.S. Army researchers from the U.S. Army Armament Research, Development and Engineering Center (ARDEC) have been successfully experimenting with 3D printing for one ...

[Michael Becker] has been using FreeRTOS for about seven years. He decided to start adding some features and has a very interesting C++ class wrapper for the OS available. Real Time Operating Syste…

Remember the 1980s, when velcro sneakers were the hip new thing? (Incidentally, VELCRO® is a registered trademark for VELCRO® brank hook-and-loop fasteners but we use it here as a general term for …

Last week in Milwaukee was Cyphercon, Wisconsin’s premier hacker conference. You can’t do a hacker con without either an electronic conference badge or a 45 hanging off a lanyard, and t…

Industrial controls are fun to use in a build because they're just so -- well, industrial. They're chunky and built to take a beating, both from the operating environment and the users. They're often ...

There are very few constants in the world of home-made electronics. Things that you might have found on the bench of a mid-1960s engineer working with germanium PNP transistors just as much as you …

[Frederico Musto], one of the Arduinos in the Arduino vs. Arduino saga (which finally came to an end last September) may have fabricated his academic record. This news comes from Wired, providing doc...

Part of the problem with having an alarm system is its reliance on land line telephone service. Some of them are getting away from this practice, but there are still many legacy systems out there that...

Slotting a modern media center into an old stereo usually means adding Bluetooth and a Raspberry Pi to an amp or receiver, and maybe adding a few discrete connectors on the back panel. But this med…

[Slider2732] got his Orange Pi Zero working with a 3 watt amplifier, wireless keyboard (with built-in mouse), and car reversing monitor. But he needed a case to house it in. He remembered that he u…

De-lousing is a trying agricultural process. It becomes a major problem in pens which contain the hundreds of thousands of salmon farmed by Norwegians — the world’s largest salmon expor…