So for Robotics class I need to use an IR receiver to take commands from a Sony TV remote. I didn't take one of the receivers home that I was using, as my prof said it was easy to rip one from any electronic device and rig it up onto my Arduino. Well, today, I wanted to do some homework, so I worked with a friend to rip one from an old StarChoice receiver (It looks like this but it's black, not silver, it seems to be a Motorols DSR550 Voom cable box), however, I need to figure out the pinout of the receiver. This is the receiver: http://imgur.com/ZufmmfH I know for a fact that the white cable is the VCC (It was using a square pad on the circuit board I ripped it from), however, I'm not sure what is ground and what is signal. Here is a (shitty) closeup of the receiver: http://imgur.com/unwWPJL The text under the receiver's diode is "5XM4". I can't seem to find any datasheets on it, as I don't know of any branding or whatnot. Has anyone here seen one of these ICs? I don't have any meters to test it, sadly, but I also don't want to blow my Arduino.