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Contact between GND and +5V

NipponNippon
edited October 2013 in Troubleshooting
Yesterday I soldered my Kit and in step 16 I used my Continuity tester and it made a very loud beeep. This was a hit in my face. Now I want to ask what can I do. Maybe a component is defect. Or i damaged my PCB. I proved my soldering and I cant recognize any contacts between soldering points.

Comments

  • fcd72fcd72
    If a component is defective it will most likely have no conductance whatsoever. Chances are best you have accidentially shorted something, somewhere. Post some High Res (REALLY high!!) Pictures of the Front and Back of your Board, maybe we can spot something.
  • PatrickPatrick
    A guy with same issue has inserted all ICs and get this failure.
    Make sure you dont have the same Situation
  • julianjulian
    should also not happen with the ICs inserted. Are we speaking of a short beep ollowed by silence or a long consistent beep as long as there is contact?

    Other than that I'm with fcd72 - some high res pictures would help.
    Normaly a short indicates a soldering error or a small metal part that got stuck somewhere
    Sometimes they are hard to see.

    what resistance do you measure between 5V and GND?
  • NipponNippon
    The beep is as long as there is contact.
    But at the moment I cant get high res pictures. I try to get a digital cam with a lot of pixels.
    The resistance between GND and +5V is around 2.16kΩ.
  • julianjulian
    are you sure your Continuity tester is working all right?
    it should not beep with 2.16k
    Normally they start beeping around 100 to 200 ohm.
    I measure ~2.7k here on my prototype unit.
    Both are far from a short.
  • NipponNippon
    edited October 2013
    Thank you for the hope. I think my multimeter is not the best on monday or tuesday I will measure it again with a better multimeter to be sure about that.  
  • fcd72fcd72
    You should get a new battery for your multimeter......
  • NipponNippon
    Today I bought me a new multimeter and the resistance is still 2,18kΩ and the built-in continuity tester makes no noise anymore. That means I will continue to solder.
    Thank you for your help.
  • KardiobreakKardiobreak
    mine beeps at 1,68K is it far from short too ? 
  • AltitudeAltitude
    edited October 2016
    shorts will be in the ohm range, not the kilohm.  Continuity testers on a meter will beep under several ohms (some are adjustable).  A short beep on the power rails is normal since capacitors need a second to charge and will read as a brief short
  • PeterJohnPeterJohn
    edited April 2017
    Hi...i am a new user here. As per my knowledge If a component is defective it will most likely have no conductance
    whatsoever. Chances are best you have accidentially shorted something,
    somewhere.

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