Connect with us

About Zero Ohms resistors

Discussion in 'Electronic Basics' started by Simon Dice, Sep 6, 2006.

Scroll to continue with content
  1. Simon Dice

    Simon Dice Guest

    Could any one be so kind to explain to me what are the zero ohm
    resistors and what are they used for?
    Thanks!
     
  2. Soldered jumpers.

    Jon
     
  3. Eeyore

    Eeyore Guest

    Convenience.

    You could use wire links too but not all auto-insert machinery is set up to do
    this.

    On the SMD level a zerohm link is the only option.

    Widely used to avoid requiring a 2 layer pcb.

    Graham
     
  4. DJ Delorie

    DJ Delorie Guest

    I use them for "I might need a resistor here". For example, in one of
    my current designs I've got four 0603 footprints forming a "plus" on
    each I/O port (the wires run across the house, lots of EMI issues,
    etc) - one from the driver to the common point, one from power to the
    common point, one from ground, one from the common point ot the
    terminal block. That way, I can wire it up for whatever type of
    filter (RC, termination, 1wire pullup, etc) I need. Zero ohm
    resistors would be used when no resistance was needed.

    VCC
    |
    [ ]
    [ ]
    |
    driver ----[] []---+---[] []---- terminal
    |
    [ ]
    [ ]
    |
    GND

    You can also use them to disconnect parts of the circuit from each
    other, either for debugging or for alternate designs. Sort of a
    hard-wired SPST or SPDT switch.
     

  5. Super conductors for situations when you need infinite current but only have
    a few volts available ;)
     

  6. Only in really crappy designs. OTOH, you rarely see a decent design
    on a single sided PC board.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     

  7. They have a number of good uses:

    1. To configure a board for a particular use.
    2. To ground unused inputs.
    3. To prevent accident reprogramming.
    4. For a Zero dB Pad (Attenuator or gain control) where you eliminate
    the two resistors to ground, and replace the series resistor with Zero
    ohms for a direct connection.



    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  8. It's just a jumper. The thing is, a little piece of wire won't fit in the
    claw of a pick-and-place machine. They don't want to assemble by hand, so
    the wire gets a little epoxy jacket to make it fatter.
     
  9. Guest

    to replace the solder blob, hope I speel it correct :)
     
  10. Jamie

    Jamie Guest

    jumpers?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-