I've cut up a LPD8806-strip into 6 segments (with 4 LEDs each) and connected all Outputs to the respective following Inputs. This works fine for the first 3 segments, but the last 3 segments are much dimmer. When testing the output of the third strip with a multimeter, it only supplies 2.7V instead of 5V to the next strip-segment. I've tested all solder joints with a continuity tester, and they are fine. Before cutting up the strip, all LEDs were working fine (with the same 5V, 2A power supply). I've correctly adjusted the number of LEDs (strip-length) in the Arduino code. I've checked for solder balls and left-over wires and lightly pressed on adjoining ICs as recommended in the Adafruit Troubleshooting-Wiki. Does anyone have an idea what could be going on here?
P.S.: It doesn't look as "bad" as it is in reality on the attached pic. When running the strandtest-sample, the bottom 3 segments flicker or don't turn on at all, so it's not simply a brightness-issue.
- IMG_20130323_150129_3.jpg (972.73 KiB) Viewed 141 times