Kevin Watson
29-01-2004, 14:09
In a posting last night (http://www.chiefdelphi.com/forums/showthread.php?t=23742&goto=newpost), Matthew H/Ubergeeks mentioned that the "Photo-detector Diagram" document on FIRST's website is incorrect. Pins 1 and 3 are flipped on the sensor. If you built your sensors using the illustration in this document, you'll need to flip the wires on pins 1 and 3 for them to work. For reference, here are the directions from the FAQ (http://kevin.org/frc/faq.html):
...cut the male end off of a PWM cable, strip some insulation off each of the three wires, and then solder the white or yellow wire to pin 1 of the sensor, the black wire to pin 2 and the red wire to pin 3. Make sure to insulate the connections to prevent shorting. A diagram of the sensor with pin assignments can be found on the first page of the TSOP34840 data sheet (http://kevin.org/frc/TSOP34840.pdf).
-Kevin
...cut the male end off of a PWM cable, strip some insulation off each of the three wires, and then solder the white or yellow wire to pin 1 of the sensor, the black wire to pin 2 and the red wire to pin 3. Make sure to insulate the connections to prevent shorting. A diagram of the sensor with pin assignments can be found on the first page of the TSOP34840 data sheet (http://kevin.org/frc/TSOP34840.pdf).
-Kevin