Finally adding to HackADay... the Floppy Clicker!
Add a click to any I2C traffic on the I2C bus or just trigger your favorite clicks and tones on demand.
The limit is only how long the relay will last... something tells me they were not quite intended for this use case.
Build Instructions for all revisions: Floppy-Clicker-SAO/docs/revisions.md at main · DmitryPustovit/Floppy-Clicker-SAO
Full docs and code will continue to be updated at the linked Github.
There will be a Tindie posting as well in case folks want to get one as well.
For the Development Edition (Rev 1.0) there are debug headers.

glgorman
Cora
timonsku
BART
I appreciate this mechanical SAO! There is a lot of thought that has gone into it, and one thing I'd like to learn more about is how you implemented the battery to prevent hammering on the SAO power rail when the relay pulls in. I'm wondering if the technique you used here could help stabilize the power use in mt Core4 SAO, which uses [short] pulses of about 400 mA which is a bit much for must SAO power supplies to handle. I've thought about capacitors as a solution...