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 we were sick and tired of compromises: "speed or torque", "traction or maneuverability", etc.; bump that, we want it all. all we had to compromise was simplicity. - RogerR [more] |
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#3
03-04-2012, 11:48
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Re: homemade encoder issues
According to the datasheet, the NTE3100 has an NPN phototransistor. If that's the case, Brian McGinty has connected it very oddly.
Try connecting the "bottom" of the detector to ground (the "-" pin on a Digital Sidecar's DIO connector) and use the "top" of the detector for the output (the "SIG" pin). The Digital Sidecar's internal pullup resistor will give you a false reading when the sensor is illuminated, and a true reading when the LED is blocked. 
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