How should we wire the photoswitchs?

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How should we wire the photoswitchs?

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10-01-2011, 21:02

kamocat

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AKA: Marshal Horn

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Re: How should we wire the photoswitchs?

We need to put a resistor in series, don't we? The 9403 can withstand a 30v signal, but use at this voltage will degrade the life of the module.
The standard voltage it specs is -0.5v to 5.25v.

If possible, I'd prefer to use an inline resistor, instead of a voltage divider. At 250 micro-amps, it would take a 34k resistor to drop the voltage from 12v to about 5v.

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