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Most sites I've looked at say when wiring the comparator output to the base of an NPN transistor, to put the load before it. Will it hurt to put the load after it? If so, why?
Ok. Another question: what's with the supply pins on the duals and quads (Vcc and Vdd)? On the quad, they lead to only two of the four, but on the dual, they lead nowhere.
**broken link removed**
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And why is the LED going to the comparator from the positive instead...
MIMSAR, that is my situation and thank you, Reloadron. Now here is what I will do: I will sample the amount of voltage running through a test circuit when the source is unlit, raise the number slightly, and try to mimic that using resistors on my actual circuit. The comparator will be hooked up...
You kinda lost me. Are you saying use a simple photoresistor and there will always be voltage but the comparator will determine how much is needed to light the LED?
I am only a beginner in electronics, so I don't know much about light sensing. I need the correct light sensor for the following environment: the area needing to be sensed is about 1/2-1 foot away, there is a reasonable amount of ambient light reflecting onto the surface. When lit, it is...
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