In her latest Intersil “Academy of Analog Pinball Wizardry” video, Jeri Ellsworth replaces an HC55564 Continuous Variable Slope Delta (CVSD) codec chip with one she reversed engineered into an FPGA. What in blue-blazes is a CVSD modulator? Watch the vid and find out — as usual, Jeri does a great job of showing how it works, how she reversed engineered it, and what the result are.
In support of the latest issue of MAKE, Volume 28, MAKE contributor Stefan Jones sent me a link to this PDF of a booklet from the 1950s on model airplane building. It was put out by Sterling Models and reprinted from Flying Models Magazine.
Alex Dumas of Sci-High Models took Editor’s Choice in Starship Modeler’s 2010 Just Glue It contest with this 1/87 scale replica of the Swift, a spacecraft from the late-70s British TV series Space: 1999. Do not miss his wonderful work-in-progress shots, one of which I’ve included, below, to show off the remarkable patience and skill […]
Sébastien Bourdeauducq of /tmp/lab and the Milkymist project scored a DIY vacuum tube, and set about testing it out. I was curious to see how well the PWL triode performed. So I made a little test to measure cathode emission and amplification. The first step was to build a variable high voltage power supply, since […]
Drew Parrish operates a Barnes Velocipede Walking Arm Saw with foot pedals at theSplinters Fine Woodworking Show in downtown Eugene, Oregon.
Mycroft Milverton used an Arduino and a Wave Shield to create the Radio Arduino Classic Edition, a retrofitted vacuum tube radio that plays different classic radio tracks when it’s tuned. The device plays 60 tracks in normal mode, but also has an easter egg mode, which can play thousands of tracks. Be sure to check out Mycroft’s original Radio Arduino as well; it’s built in the shell of an Oscar Belle two band transistor radio from the 1960′s.
Retired dentist Young C. Park built this 1/16 scale replica of the WWII-era fighter plane mostly from common aluminum roof flashing, like the kind you can buy in big rolls at most hardware stores. Dr. Park spent considerable time and energy developing special methods for working this material, including an annealing technique that’s a real gem of practical hands-on shop technique…
