Hello,
a Modul to switch of after a time the dustmotor:

- Modul_a.jpg (154.11 KiB) Viewed 8481 times
The PCB was created with KiCAD:

- Modul_aa.jpg (718.95 KiB) Viewed 8481 times
Video:
https://www.youtube.com/watch?v=bnEVE1YERjU
Forum (sorry, in german...)
https://bastler-treffpunkt.de/thread-projekt-oaa-smd
Now the Modul in real (also in german, sorry):
The build instructions:
https://bastler-treffpunkt.de/thread-pr ... 3#pid41863
And here the calibrate instructions:
https://bastler-treffpunkt.de/thread-pr ... 3#pid42013
Regards
Walter