I seem to have fixed it by adding a Schottky diode from ground to signal. I think the lower forward voltage and faster switching speed than rectifier diodes helped ¯⁠\_(ツ)_/⁠¯

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anyone know why a bridge rectifier would be letting through some negative? It is mostly rectifying, except for the odd negative spike. Big divisions are 500us and 500mV

Finished soldering a core store kit. Weaving thin magnet wire through tiny ferrite toroids took forever. But now I can store 4 whole bytes with this modern reproduction of 50s memory technology! tindie.com/products/kilpelaj/c

This is the best programming book I have ever received.
Thanks @andycroll & @consonance_app! Thanks Why the Lucky Stiff! Thanks foxes!

Completed my first custom designed handwired keyboard which I call the AtreoidV. Inspired by the Atreus, I changed the bottom stagger to a straight V, used a stainless steel plate eliminating bezel, and added Bluetooth.

Measuring the speed of sound in a metal bar because that’s how this electric typewriter keyboard I have distinguishes key presses

@technomancy It’s done! Obviously inspired by your wonderful Atreus which has been my daily driver for years (I have a v2 coming too). Tweaks include straight bottom stagger, no bezel, and Bluetooth. Would you be ok with me calling it AtreusV to make the lineage clear? V is for the bottom shape.

Got another couple custom parts cut by @LaserBoost, this time in thick aluminium. I had a small special finishing request and they did it no problem, beautiful result. I’m looking for any excuse to make things in metal now 🙈

I got my keyboard design laser cut in stainless steel (and bead blasted) which came out beautifully. The team at @LaserBoost did an amazing job, packaged it so well, threw in stickers, postcards, and even a free keyring! 💖⚡️⌨️

Never really seen the effect of shielding before but here’s before and after I connected wire shielding to ground. X axis is time (in bauds I guess), Y is ADC voltage so 0-1023 where 1023 == 5v. Point is you can clearly see mains frequency being picked up then suppressed.

This is such an annoying board to decipher (but I’m getting there). Traces that appear separate but join up later. Vias that go nowhere. Missing components. Removed components. Patched on components. Weird routing. Weird ground plane. 50v intermingled with 10v and 5v.

Does anyone have a way of finding datasheets of ancient chips? I believe this is a High Speed Dual Comparator similar to the LM319 (pdf1.alldatasheet.com/datashee) but it has a different pinout. It’s a TI chip from before 1981.

Oh yes. Looking at patents from 1979 to figure out this ultrasonic keyboard

Soldering thin magnet wire is really difficult. And those ferrite beads are so small I can barely feel them

Accidentally uncalibrated my soldering iron due to confusing UX so bought a tip thermometer to calibrate it again 👌

Got these lovely silent (rubber dampers) dust proof keyboard switches for my upcoming build 🙌 @KailhSwitch@twitter.com @Evan23244419@twitter.com

Did some DIY. Added cute lil legs to a chest of drawers I found on the street to make it a better height. Used wood from a broken chair and fixings I had laying around.

The documentation site for my soldering station is not helpful. I think I’ve accidentally recalibrated it rather than setting the temperature, so I was trying to find out how to reset it 😕

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