On November 9, 2022 at 14:23, Brad Humphrey said...
Fred they have me scratching my head as well. I've been doing this for a very long time now and I can't ever remember seeing a 3 conductor emitter. Doesn't make any sense. Maybe some kind of proprietary design I missed during the early 90's, when I was more focused on mobile electronics???
Maybe he is referring to an IR receiver as having 3 conductors ?