Stray voltages on a Breadboard??

Discussion in 'General Electronics Chat' started by Dr.killjoy, Jan 14, 2014.

  1. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
    1,190
    156
    The other day I was working on a 555 circuit and noticed the led would slightly light up when I would move parts or touch something even with power removed but still on..
    Have you guys had any problems or issues? ???




    Thanks
    Jason SR
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    1,605
    Caps may hold enough charge to flash a LED. Anything else is a guess without schematic and build pictures.
     
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
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    any radio or tv stations nearby? circuit might be rectifying rf enough to light the led.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    It's pretty dry this time of year, so it's all too easy to generate static electricity with a little movement. Try boiling a pot of water on the stove for a half - hour or so and see if that helps.
     
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