From the MAKE Flickr pool Feurig etched a well-planned fish-shaped circuit to hosts a slew of pink LEDs as scales. Great work – though it would be nice to see all those lovely copper traces exposed in the final product. A lot of work goes into designing circuitry and etching your own provides an excellent […]
The New York Times has a writeup on Halted Specialties Company, which I can’t wait to visit in person: MOST retailers would recoil in horror at the thought of keeping unsold products on their shelves for 30 years. Not Halted Specialties Company. It’s willing to hold on to a few thousand vacuum tubes just in […]
I absolutely love this 1940s factory promo film from RCA , describing how they make metal-can octal base vacuum tubes. Check out the all-American family in the living room, huddled around the radio, dad in 3-piece, reading the paper, mom sewing, little Timmy and Janey player checkers on the floor. Gee willikers! [Sent to us […]
How to properly wire an Arduino to a relay.
While developing the Roboduino, Scott had to calculate how many amps his project could deliver to attached motors. He wrote up his findings (and how he arrived at them) as a helpful article – As a review, the total heat generated by the regulator is just the energy in minus the energy out. This is […]
From the MAKE: Flickr pool Anachrocomputer shares with us this handmade piece of digital days gone by – Top view of the 300 baud acoustically-coupled modem that I built in 1984. I made the double-sided PCB myself with an etch-resist pen (Dalo pen) and some rub-down transfers. The main chip is the Motorola MC14412V single-chip […]
Congratulations to Antti Seppänen, whose Beagle Board-based robot is the winner of the first Beagle Board design contest. What’s more, Antti also created a very cool expansion board for the Beagle Board, and made the design available under a CC license: My Beagle bot required building an expansion board. Some requirements for expansion board: Wide […]
