@Colman @goatsarah Actually, I think we're still not on the same page here on what target demographic I pictured here. I was thinking of way less technical and monetary investment here to make this something viable and interesting. On the level of bluetooth-cassette adapters, not developing film yourself…
But yes, if the sensors here aren't available, this obviously wouldn't work. But who knows, we've got all kinds of electronic products these days, so I thought maybe someone comes up with "Hey, if we just repurpose this aliexpress sensor used to retrofit CCTV cameras, we've got a stew going"…
Obviously, I've got literally no idea about the availability of sensors in 2023 ;)