The recent posts about phototransistors got me remembering about working with LASCR's, maybe 30 years ago. They are Light Activated SCR's & I used to make camera flash detectors for my friends. They were pretty cool devices. I thought maybe I might order a few to mess with, but can't seem to find any part numbers...does anyone know of any Light activated SCR part numbers (that you can order)? I found a few "ancient" numbers, like GE-23 or similar.
Have the LASCR parts disappeared?
I also thought Sensefets were pretty cool & used them in several designs, but sadly they seem to have largely evaporated as well. Sensefets have/had two extra terminals to sense the current flow in a small copied array of internal fet cells..so no sense resistor needed. There were more and more of them becoming available, but perhaps they never took off; now there are only ragged remnants.
Maybe they join the list of "former device types" (maybe EPROMS will someday join them)