James @baldengineer@qoto.org

Progress on the Feather Op Amp Lab: a (low speed) analog waveform display! Same comparator circuit from last week, but now in addition to visualizing the output on an oscilloscope, we can display it on the OLED. Here we see a 1 Hz sine wave from the DAC on OA0's output pin. Then we move to channel 1 to see the square wave, which is the comparator's output. Finally, we can see how adjusting the ratio of the resistors in the ladder affects the duty cycle — both on the scope, and on the Feather!

After watching this video I feel like foraging for pine resin to make soldering flux! https://youtu.be/1piQpi00d-A

I really liked the juxtaposition of fleece fabric with 3D printed meshes from my rainbow fish project printed, so I'm now working on making a soft-sided icosahedron with a grid of 3D printed triangles on each side (to be illuminated ofc) It's required a LOT of hand sewing to securely attach the 3D printed meshes to the soft icosahedron sides, but there are now only two left to go before I can start installing the LEDs.

PCB Coasters Galore https://blog.tindie.com/2023/05/pcb-coasters-galore/

Total Replay v5.0 is out. It features 484 Apple II games (182 new since v4), all playable from a single bootable 32MB hard disk image.

https://archive.org/details/TotalReplay

Code: https://github.com/a2-4am/4cade/releases/tag/v5.0

Thanks to @a2_qkumba, @txgx42, @helix_nrg, Andrew Roughan, Frank M., Kris Kennaway, @ladyailuros, and everyone else who contributed to this project in the past four years.

#AppleII #retrocomputing

I hope everyone has a perfect date today.

Teardown is back! It's an awesome conference for hacking, discovering, and sharing hardware,
June 23 - 25, 2023, in Portland, Oregon https://www.crowdsupply.com/teardown/portland-2023 #Portland #PDX #PortlandOregon #Teardown2023 #CrowdSuppy #HardwareHacking

Ooh! PSA: Teardown tickets sales have now started! There are still some reduced early bird tickets left, but they won't last long.

It's the first year I'll be organizing it instead of just attending! Portland is stunning in the summer: come hang out and hack with us ✨

https://crowdsupply.com/teardown/portland-2023

Arduino Day 2023! https://blog.tindie.com/2023/03/arduino-day-2023/