Thread: How should we wire the photoswitchs?
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Unread 11-01-2011, 14:02
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Re: How should we wire the photoswitchs?
Lets be very careful with those 'line sensors' and the electrical hookup.

Some facts that we do know. The sensor will work just fine on 12 volts DC which generally means at the output (ie: LO,DO ) MAY have a voltage range from 0VDC to 12VDC. The Digital sidecar does have a 'general purpose' I/O lines which opearte in the 0VDC to 5VDC range!!!!!

That means if the sensor sources a 12VDC level you can kiss your digital sidecar goodbye as the blue smoke comes out. NO, a series resistor will only limit the current, not the voltage and either or both will kill a digital sidecar.

To be on the safe side I would use the analog sidecar to input the sensors.

I have not looked at the sensors tech sheets yet but will sure err on the side of caution.

Of course one way to find out is to look at the 'sample code' and see where the information for the sensors is read.