In which I build a Linux computer cheap enough to give away

Imagine you wanted to take a digital photo, but you didn't have a camera. I know what I would do. Build my own digital camera!

Data logging of 2 electricity meters (tpye "eHZ") simultaneously and store data (time of reading, value of reading) to SD card.

Raspberry Pi Photo Frame in Less Than 20 Minutes: Yes, this is another digital photo frame! But wait, it’s more sleek, and probably the fastest to assemble and get running.

Juuke - a RFID Music Player for Elderly and Kids: This is the Juuke box. The Juuke box is your own musical friend, made to be as easy as possible to use. It is especially designed to be used by elderly and kids, but can of course be used by all other ages.…

Electric Thrush: Sitting on the deck in late evening I was truly amazed at the resonant call of a tiny bird sitting on a bare twig at the top of a distant birch tree. The call is amazingly potent to the ear. It belongs to a family of unique singers -- thrushes.…

Another week, another exploit against an air-gapped computer. And this time, the attack is particularly clever and pernicious: turning a GPU into a radio transmitter. The first part of [Mikhail Dav…

The demo code for [XTronical]’s ESP32-based SD card music player is not even 40 lines long, though it will also require a few economical parts before it all works. Nevertheless, making a micr…

I dug around in my parts bin and salvaged some materials from the dumpster to make a self portrait that reflects on people and ideas that have impacted me or been on my mind this past year. You might call it a meta-self portrait as it is essentially a glorified…

Inspired by Ben Eater's "World's Worst Video Card" video, I wanted to see how low we could get the chip count, and whether it would fit on a single breadboard. It would have done, if I'd squeezed it in more tightly!

Updated Movie Box: A few months back, I posted an Instructable on my Raspberry Pi movie player tucked into a VHS cassette. Since then, I have built several for friends and family, and have simplified the process. Using a Raspberry Pi v3, we no longer need…

Tiny, high-performance computer that runs Linux or the NuttX real-time operating system

Bluetooth-Connected Rotary Payphone: About 10 years ago, feeling inspired by Sparkfun, I wanted to turn a 1950's Western Electric Rotary Payphone into a working Bluetooth headset. I called it "The World's Most Impractical Bluetooth Headset." After some hacking…