Hi,
Just a quick question. Im looking at a circuit diagram that supposedly uses an IR beam break system. I was under the impression that such systems didn't need a preamp and could be wired straight into the pic, but this apprears to use a preamp circuit.
**broken link removed**
What is the function of the circuit outlined in red, and would it be nessesary for a beam break system?
Thanks!
Just a quick question. Im looking at a circuit diagram that supposedly uses an IR beam break system. I was under the impression that such systems didn't need a preamp and could be wired straight into the pic, but this apprears to use a preamp circuit.
**broken link removed**
What is the function of the circuit outlined in red, and would it be nessesary for a beam break system?
Thanks!
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