Smoked my 555 Timer

Discussion in 'General Electronics Chat' started by fearnofish420, Mar 5, 2009.

  1. fearnofish420

    Thread Starter New Member

    Feb 17, 2009
    8
    0
    I am not sure but I made a pwm circuit with a 55 time ic and everything worked as thought when I had it connected to a breadboard. Recently I tried to put everything onto a PCB by soldering the connections myself. I double checked to make sure no solder was touching other connections on the pcb. I without thinking touced the neg wire from the pcb to the + of the 12v battery and the + of the pcb to the - or the battery. would this be the reason I smoked the 555 Timer CHIP??:confused::mad:


    Thanks
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Sadly, that would indeed let the magic smoke out. :(

    The good news is that you roasted one of the most plentiful and inexpensive IC's on the planet. Obtaining more won't take either much time nor money.
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    If you post a schematic diagram of the circuit maybe we can help you avoid a repeat performance of the smoke signals. That is if the cause was a hook-up error.

    hgmjr
     
  4. HarveyH42

    Active Member

    Jul 22, 2007
    425
    5
    Also, the 555 can only sink/source 200 mA, CMOS is less, but don't know the number off hand. If your load exceeds that, you get smoke.
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    When did you see the smoke coming out?
     
  6. flat5

    Active Member

    Nov 13, 2008
    403
    17
    "Smoked my 555 Time"

    Heavy man. Did you get high?
     
  7. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    You put a 555 in a smoking pipe and enjoy it!!! :p
     
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