piclist 2001\01\02\112214a >
Thread: SPICE and Simulators
face BY : 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.

Where's dave? http://www.findu.com/cgi-bin/find.cgi?kc6ete-9

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