linusakesson.net
Music downloads
Video clips
Scene productions

Sum Ergo Demonstro

I made another demo for the Raspberry Pi Pico 2 microcontroller and got 3rd place in the Revision 2026 wild compo.

For reference, here is the first one: Kaleidoscopico

Download

Schematics

There's also a layout for stripboard in the Download section.

Under the hood

Some of the technical details are explained in a companion video.

Posted Monday 6-Apr-2026 10:26

Discuss this page

Disclaimer: I am not responsible for what people (other than myself) write in the forums. Please report any abuse, such as insults, slander, spam and illegal material, and I will take appropriate actions. Don't feed the trolls.

Jag tar inget ansvar för det som skrivs i forumet, förutom mina egna inlägg. Vänligen rapportera alla inlägg som bryter mot reglerna, så ska jag se vad jag kan göra. Som regelbrott räknas till exempel förolämpningar, förtal, spam och olagligt material. Mata inte trålarna.

Anonymous
Mon 6-Apr-2026 12:14
amazing job!
Anonymous
Mon 6-Apr-2026 12:46
Great to see another very fine RISC-V entry!
Anonymous
Wed 8-Apr-2026 23:02
Amazing. So fun to watch.
Anonymous
Tue 21-Apr-2026 19:38
Was there issue with digital audio or you simply like analog audio better? There us a library implementing audio here https://github.com/fliperama86/pico_hdmi
Anonymous
Sun 7-Jun-2026 07:51
Could you please post a *short* summary indicating the principal techniques without explanation. Why?

I might or might not be very interested in the details of how it is achieved.

I am prepared to spend 30-60 seconds determining whether I am interested.

I am not prepared to spend 60 minutes on the off-chance it might be interesting. My remaining life is too short.

I can speed read >>10* faster than people can speak (CGP Grey excepted :) ). Hence I look at written reports, and avoid talking head videos (usually full of “ums” and “ahs”).