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chip fried? — Parallax Forums

chip fried?

meistermeister Posts: 3
edited 2010-11-04 14:29 in BASIC Stamp
Now, I'm fairly sure I didn't give the board anything it couldn't handle, but now my PULSOUT is no longer giving me a square wave. I've been using it to drive an LED with far less current than normal for a few weeks with no trouble, but now the waveform is… hinky.
This happened after I removed a resistor I'd been using between the led and the pulsout pin and replaced it with a potentiometer. There was another resistor in the series to keep the led from being burnt out if the trimmer were set too low. When I couldn't detect the led light anymore, I hooked the output right to the oscilloscope and these pictures are of what I got. That was a pretty square wave when I started.

Ideas?
scope.jpg
1600 x 1200 - 366K
scope2.jpg
1600 x 1200 - 381K

Comments

  • meistermeister Posts: 3
    edited 2010-11-04 13:04
    Fixed it. Culprit was a limo splitter, not the board. Sorry for the false alarm
  • ercoerco Posts: 20,256
    edited 2010-11-04 13:17
    Glad you got your fried chippen de-hinky-fied.

    Now what's a limo splitter?
  • meistermeister Posts: 3
    edited 2010-11-04 14:29
    Pardon my spelling, those are lemo connectors that I plugged into a lemo splitter. Specifcally lemo 00.
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