What do you print with your 3D printer? Key chains? More printer parts (our favorite)? Enclosures for PC boards? At Johns Hopkins, they want to print bones. Not Halloween skeletons, either. Actual …

In this short series, we’re going to get you set up with a completely DIY home automation system using MQTT. Why? Because it’s just about the easiest thing under the sun, and it’s…

Remember September 2016 2015? That was the month that [Ahmed Mohamed] brought a modified clock to school and was accused of being a terrorist. The event divided people with some feeling like it was ig...

We love solar power. Not only is it environmentally friendly, but it’s relatively lightweight and involves fragile high technology. Just the sort of thing that we’d want to strap onto t…

So it's Saturday morning and you've found yourself with an urge to build something involving copper plates or carbon electrodes. Maybe you need a metallic powder for a chemistry experiment. Casting su...

Sometimes we feel confident in our soldering skills (but only sometimes) — and then we see something like this done. Someone over on the XDA developers forum managed to upgrade his Nexus 5 fr…

Recently we started a series on the components used to assemble a circuit board. The first issue was on dispensing solder paste. Moving down the assembly line, with the paste already on the board, …

Once in a great while, effective advertising doesn't require any human engagement at all. This billboard, designed and built by a pair of Brazilian ad agencies and set free under the Creative Commons ...

Eddie is a surprisingly capable tiny balancing robot based around the Intel Edison from which it takes its name.

Eddie's frame is 3D printed and comes in camera and top hat editions. The camera edi...

A fan used to be a simple device – motor rotates blades, air moves, and if you were feeling fancy, maybe the whole thing oscillates. Now fans have thermostats, timers, and IR remotes. So why …

Every few years, someone on the Internet builds a truly homebrew CPU. Not one built with a 6502, Z80, or a CPU from the 80s, either: one built completely out of 74-series logic chips or discrete tr…

Those tiny black rectangles of epoxy aren’t black boxes anymore. Decapsulating ICs is becoming somewhat common, and if you’re reverse engineering a chip-on-board epoxy blob, or just fig…

No circuit is so trivial that it’s not worth thinking hard about. [Charles Wilkinson] wanted to drive a solenoid air valve that will stay open for long periods of time. This means reducing th…

The Peachy Printer, originally a crowdfunding campaign for a $100 stereolithography 3D printer, is now dead in the water.[Rylan Grayston], the creator of the Peachy Printer, announced that [David B…

If you've read through the comments on Hackaday, you've doubtless felt the fires of one of our classic flame-wars. Any project done with a 32-bit chip could have been done on something smaller and che...

Android-based TV sticks should be in more projects. They are readily available and inexpensive. They have a lot of horsepower for the price, and they can even boot a mainline Linux kernel, unlike s…

[Martin Raynsford] wrote a program that converts a black-and-white 2D image to G-code so that his laser printer could then etch the image. Not satisfied with just that, he used his laser printer to…

You need a coffee table, you need a dinner table. Do you really need two tables? [Shua] thinks the answer is "no". That's why he built this swinging countersink table out of concrete and a aluminum....

Knocking a microcontroller into sleep mode and waking it up on demand or in intervals is common practice in many low power applications, enabling devices to stay in operation for years on a single …