A Hombrew Retro Laptop
We feel bad when we see a retrocomputer project and think, “Hey! That’s not that old.” But, usually, when we think about it, it really is. Take the Penkesu. It …read more Continue reading A Hombrew Retro Laptop
Author Archives: Al Williams
Printing Magnets
A research center in Spain has been working on ways to solve recent supply chain issues. One of these issues is a shortage of materials to make magnets. Their answer? …read more Continue reading Printing Magnets
As Fast as a Speeding Bullet
[Electronoobs] built a coil gun and the obvious question is: how fast is the projectile? To answer it, he built a chronograph suitable for timing a bullet. The principle is …read more Continue reading As Fast as a Speeding Bullet
3D Printing Tiny Metal Parts
It may sound like a pop band, but μ-WAAM is actually a 3D printing technique for making small metal parts from the NOVA University Lisbon. Of course, WAAM stands for …read more Continue reading 3D Printing Tiny Metal Parts
Predicting the Future: How’s That Working Out?
With 2022 off to a good start, it is about time to let go of all those New Year’s resolutions that didn’t quite work out. The scale’s needle didn’t reverse, …read more Continue reading Predicting the Future: How’s That Working Out?
Pump up the Resin
Sometimes the best ideas are simple and seem obvious after you’ve heard them. [Danny] showed us a great idea that fits that description. He uses a peristaltic pump to move …read more Continue reading Pump up the Resin
3D Printing Rainbows
[The Action Lab] had a very serious technical problem. His daughter wanted to 3D print sparkly unicorns. But how do you make a 3D print sparkly? Turns out, he had …read more Continue reading 3D Printing Rainbows
Sticker Brings the Heat
[Carl] is always looking at making heater plates for PCB reflow and other applications. In his latest video, he shows how he is using thin flexible PCBs with adhesive backs …read more Continue reading Sticker Brings the Heat
Homemade Probe for 3D Printer: $3
You have a few choices if you want to use a probe to level your 3D printer bed. Rarely, you’ll see optical or capacitive probes. More commonly, though, your probe …read more Continue reading Homemade Probe for 3D Printer: $3
Maybe the Simplest Cloud Chamber
Have you ever seen a Wilson cloud chamber — a science experiment that lets you visualize ionizing radiation? How hard would it be to build one? If you follow [stoppi’s] …read more Continue reading Maybe the Simplest Cloud Chamber