Hello,
I bought an arduino about a year ago, and now I connected the arduino to an IR receiver. Suddenly, when I plug the arduino into the computer, the arduino turns on for a second, then turns off. However, the arduino stays on if their is noting connected to the arduino.(btw, i replaced the usb cable, but the same thing happened.)
Post a schematic of your setup, or at least a link to the datasheets. I have read that some sensors can draw up to 45ma, and digital pins have a tolerance of 20ma.
Does your sensor say to use a current limiting resistor?
If its like this one, SparkFun IR Receiver Breakout - TSOP85 - SEN-08554 - SparkFun Electronics, then there are a few interesting comments at the bottom of the page.
ohhhh,
I just used a IR receiver from an stereo system. Is there any way of recuperating the datasheets for that?