SPICE and Simulators
David VanHorn email (remove spam text)
I've had mixed results with simulation, mostly because they never include
ALL the details of the circuit. I tend to simulate in hardware :)
BTW, how did the smoke detector work out?
I was thinking on that some more.. Your target is a little unusual, and a
reflective detector may not work.. If I understand it right, your target is
carbon soot, which absorbs IR very well.
Might work better, to set up a feedback loop that requires a certain level
of illumination on a phototransistor, and monitor LED drive current.
You could do both methods in the cruciform box arraingement.
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