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Re: Set Default Digital inputs to Low? How? bad Analog value?
Check out this application note.
http://www.optekinc.com/pdf/App_Note_213.pdf
See figure 1 and figure 3.
The collector current of the phototransistor is relatively low.
The OPB606 is 500 uA this can pull down 5V thru a 10k resistor.
The OPB704 is 50 uA this can pull down 5V thru a 100k resistor.
I do not know what the input circuit of your controller looks like, but I would guess that the OPB606 might work with a direct connection as long as pullup is 10k or greater.
The OPB704 will very likely need the circuit shown in figure 3.
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FRC 623 2003,2004,2005,2006,2007,2008, 2009, 2010, 2011
FRC 1900 2007
FVC 60 and 193 2006
FVC 3271 2007
FTC 226 and 369 2008, 2009, 2010, 2011
FTC 3806 2010
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