[Daniyal]’s goal is to build an automated garden that allows him to grow plants in any environment he chooses. He’s got a good start with this rig, which is controlled by a Pi Zero connected via se…

It’s 2100 AD, and hackers and normals live together in mile-long habitats in the Earth-Moon system. The habitat is spun up so that the gravity inside is that of Earth, and for exercise, the n…

Everyone remembers their first. Their first CPU, that is. For many of us, it was the RCA 1802 thanks to the COSMAC Elf articles that ran in Popular Electronics. The later versions of the chip family w...

It’s a sad reality that, by and large, cardiopulmonary resuscitation (CPR) doesn’t save lives. Despite all the “you could save a life” marketing aimed at getting people cert…

The ambitious etchr - the PCB Printer is just a concept at the moment, but it's not often we see someone trying to tackle desktop PCB production in a new way. Creator [Jonathan Beri] is keenly aware...

If you have an older handheld battery-powered device, you may be fighting a diminishing battery capacity as its lithium-ion cells reach the end of their life. And if you are like [Fox D'Gamma], whose ...

Remote control robots are nothing new. Using Bluetooth isn't all that unusual, either. What [SayantanM4] did was make a Bluetooth robot that accepts voice commands via his phone. The robot itself isn'...

Logic analyzers used to be large boxes full of high-speed logic and a display monitor. Today, they are more likely to be a small box with a USB port that feeds data to a PC application. [Juan Antonio ...

If you’ve done 3D printing, you’ve probably at least heard of Tinkercad. This popular CAD package runs in your browser and was rescued from oblivion by Autodesk a few years ago. [Chuck]…

In just two weeks, we'll be flooding into the casinos of Las Vegas for DEF CON. By far our favorite part is the unofficial hardware badges which make their way to the con each year. The AND!XOR team h...

The experience of being a teenager leaves a host of memories, of social awkwardness in the difficult process of not quite being a child any more, of tedious school days, and of team sports seemingl…

When you think of image processing, you probably don’t think of the Arduino. [Jan Gromes] did, though. Using a camera and an Arduino Mega, [Jan] was able to decode input from an Arduino-conne…

For the last few years at DEF CON, we’ve seen the emergence of an entire community of badge creators. These aren’t official badges — good news, since the official DEF CON badge wi…

The first computer I ever physically saw — I think — was an IBM System/3. You might not remember them. They were business computers for businesses that couldn’t justify a big main…

Chorded keysets can be found all over. For instance, Braille writers and court stenographers both use them. These chorded keyboards create each letter by pressing a combination of keys rather just one...

How do I get the data off this destroyed phone? It’s a question many of us have had to ponder – either ourselves or for friends or family. The easy answer is either spend a mint for a r…

An orrery is a clockwork model of the solar system, demonstrating the machinations of the planets traveling around the sun in a sublime pattern of epicycles. A tellurion is a subset of the orrery, …

Breadboarding is a great way to get started with electronics, and with the wide availability of those little wire jumpers, it’s never been easier – until you hit roadblocks due to poor …

[Jarrett] has a box of Nokia phone batteries and decided to use them in a project. He designed and built WiFi throwies– these consist of ESP8266 WiFi chips attached to custom PCBs and powered…