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I want to be clear. Are you saying that the SR-HC501 already has a limiting resistor? Do I still need one?
If the PIR has a 3.3v logic level output and my lasers are 3.0 Volts, why can't I use that power source and not use the transistor?
And, you are saying that the NPN transistor currently...
I need all the help that you are willing to provide. What you say absolutely makes sense. I clearly do not want
to burn out the lasers. How are these limiting resistors acquired? What else do I need to know when I purchase them? Grateful for your help.
Bob
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