Hello-
Some IR transistors come with 2 leads, some with 3.
How do I hook up the 3rd lead (which I assume is the base) in this case?
If I want to shine the IR transmitter/LED continuously and send a signal when I disrupt the beam, is that OK?
I am reading lots of stuff about 38kHz frequencies being needed.
I am not building a TV remote, just a circuit that sends a signal when the beam is interrupted.
Thank you,
Nora
By "looking" for a frequency, intelligence, you can avoid false triggering from ambient sources. [That's not just sunlight or something, it's my favourite frequency.]
38kHz detectors (for remotes) don't make great beam-break detectors as there's a timing issue. Not that that cannot be overcome, it's just a complication.