Manual Supports for 3D Printing
[MakerSpace] wanted to 3D print an RFID card holder. On one side is a slot for a card and on the other side has recesses for the RFID antenna. They …read more Continue reading Manual Supports for 3D Printing
Author Archives: Al Williams
Measuring An Unknown Velocity Factor
When is the speed of light not the speed of light? Of course, that’s a trick question. The speed of light may be constant, but just as sound travels at …read more Continue reading Measuring An Unknown Velocity Factor
Crystal Radio Kit from the 1970s
If you read the December 1970 issue of Mechanix Illustrated, you’d be treated to [Len Buckwalter]’s crystal radio build. He called out Modern Radio Labs as the supplier for parts. …read more Continue reading Crystal Radio Kit from the 1970s
Hackaday Podcast Episode 267: Metal Casting, Plasma Cutting, and a Spicy 555
What were some of the best posts on Hackaday last week? Elliot Williams and Al Williams decided there were too many to choose from, but they did take a sampling …read more Continue reading Hackaday Podcast Episode 267: Metal Casting, Plasma Cutting, and a Spicy 555
PC Watercooling Prototype is Pumpless
Watercooling is usually more efficient than air cooling for the same volume of equipment, and — important for many people — it is generally quieter. However, you still have water …read more Continue reading PC Watercooling Prototype is Pumpless
Computing Via (Virtual) Dominos
Back in 2012, [Matt Parker] and a team built a computer out of dominos for the Manchester Science Festival. [Andrew Taylor], part of the team that built the original, has …read more Continue reading Computing Via (Virtual) Dominos
Early CD Player Teardown
While CD players are nothing new today, they were the height of high-tech in the early 1980s. [w1ngsfly] shows us the inside of a Phase Linear 9500 player from 1983. …read more Continue reading Early CD Player Teardown
Getting Started with Radio Astronomy
There are many facets to being a radio hobbyist, but if you’ve ever had the urge to dabble in radio astronomy, check out “The Novice’s Guide to Amateur Radio Astronomy,” …read more Continue reading Getting Started with Radio Astronomy
Recycling Wires for Breadboarding
It is easy to take things for granted, but if you work with students, you realize that even something as simple as a breadboard needs explanation. [0033mer] recently shared a …read more Continue reading Recycling Wires for Breadboarding
Linux Fu: Stupid Systemd Tricks
Last time, I gave a whirlwind introduction to a very small slice of systemd. If you aren’t comfortable with systemd services, timers, and mounts, you might want to read that …read more Continue reading Linux Fu: Stupid Systemd Tricks