The Pacemaker Patch
A pacemaker is implanted to send signals that regulate a patient’s heartbeat, and to do that, you need power. That means they require battery changes, and when the device in …read more Continue reading The Pacemaker Patch
Author Archives: Al Williams
Custom Watch is on the Case
We were excited to see [Z0hn]’s project about 3D printing a custom watch from scratch — both because it was an exciting idea, and because the pictures looked great. While …read more Continue reading Custom Watch is on the Case
Homebrew Macropad Looks Good
We are fans of macro pads and especially homebrew ones. The Apna Dost project by [np_vishwakarma] ticks most of our boxes. In addition to a few buttons, there’s an encoder, …read more Continue reading Homebrew Macropad Looks Good
The Air Position Indicator for the B-29
When you think of a computer, you probably don’t think of a tube full of motors and mechanics. However, as [Our Own Devices] shows, the Bendix AN5841 API Computer, an …read more Continue reading The Air Position Indicator for the B-29
A Peek inside the Secret Lagercrantz Suitcase Radio
What counts as portable is somewhat a matter of opinion, especially over the years. [Helge Fykse] has a portable spy radio of Swedish origin. For its time, it was considered …read more Continue reading A Peek inside the Secret Lagercrantz Suitcase Radio
So Many Analog to Digital Converters
An old algebra teacher used to say, “You have to take what you know and use it to get what you don’t know.” You might say the same thing about …read more Continue reading So Many Analog to Digital Converters
Deep Dive into Sputnik
If you are an American of a certain age, you know the Soviet Union launched the first satellite, Sputnik, beating the United States to orbit. You might even remember ham …read more Continue reading Deep Dive into Sputnik
Print Your Own Robby the Robot
When it comes to robots, few are as iconic as Robby. [Ogrinz Labs] has wanted to build one and even examined a real one up for auction to get high-res …read more Continue reading Print Your Own Robby the Robot
Custom FM Radio Station Powered by Shell Scripts
[Trwmato] wanted to spend more time listening to a normal radio to cut back on phone use. But the programming wasn’t quite right so, of course, the solution was to …read more Continue reading Custom FM Radio Station Powered by Shell Scripts
Spy Tech: The GPS Numbers Station
We’ve talked before about number stations — mysterious shortwave transmitters repeating numbers, presumably for clandestine purposes. But, of course, the mere fact that they are unusual makes them stand out. …read more Continue reading Spy Tech: The GPS Numbers Station