Hello- 4 Questions
Some IR transistors (detectors) come with 2 leads, some with 3.
1. How do I hook up the 3rd lead (which I assume is the base) in this case?
For example, this datasheet doesn't come with a wiring suggestion:
2. Is having one with 3 leads better?
3. Why are the majority/maybe all(?) of them NPN?
4. If I want to shine the IR transmitter/LED continuously and send a signal when I disrupt the beam, is it OK to shine continuously? I'm asking because it seems like most people pulse it at 38kHz. I read this on one site: pulsing at 38kHz ... makes this setup much less prone to interference from sunlight and other sources of infrared radiation
I am not building a TV remote, just a circuit that sends a signal when the beam is interrupted.
Thank you,
Nora
Some IR transistors (detectors) come with 2 leads, some with 3.
1. How do I hook up the 3rd lead (which I assume is the base) in this case?
For example, this datasheet doesn't come with a wiring suggestion:
2. Is having one with 3 leads better?
3. Why are the majority/maybe all(?) of them NPN?
4. If I want to shine the IR transmitter/LED continuously and send a signal when I disrupt the beam, is it OK to shine continuously? I'm asking because it seems like most people pulse it at 38kHz. I read this on one site: pulsing at 38kHz ... makes this setup much less prone to interference from sunlight and other sources of infrared radiation
I am not building a TV remote, just a circuit that sends a signal when the beam is interrupted.
Thank you,
Nora