So I happened across a simplehuman 58L sensor can with voice control that was no longer working.
Some kind of electrical bug; no matter how much you power cycled it, the motion sensor status light would keep flashing red and the can wouldn't open with neither motion nor voice.
Interested to see what made it tick, so I had a go at ripping out the active components before the bin went in the (bigger) bin.
All the bits laid out:
Main board:
Looks like a PIC16LF1516 qfn handles the operation.
The voice control appears to be handled by a DSP Group DBMD8 system on chip. I'm guessing the "VT" suffix in the part number stand for "Voice trigger". Not a lot about this part online other than a quick blip on the OEM's website.
Lid position rotary encoder board flapping in the breeze. was on the motor output shaft.
Stereo microphone board.
Potted motion sensor assembly and flex (which I accidently ripped off, whoops).
Motor and reduction gearbox assy:
Gearbox snaps off of motor, revealing planetary reduction stages:
Power input board, likely reverse input protection diode. (Unit can be battery powered or uses 9V wall wart).
One other connector board. No components on this one, just headers.
Anyways, kind of ironic from a company named "simple" human but interesting nonetheless.
Replaced with a foot-operated style that likely won't break in a year