OR gate logic using diodes and resistor(multisim simulation problem)

Discussion in 'The Projects Forum' started by electrogirl, Jul 9, 2010.

  1. electrogirl

    Thread Starter Member

    May 2, 2010
    Hi. The file attached is a circuit I found on the internet that should perform the OR operation.
    My question is how should I simulate this using MULTISIM?What voltage value should I use in the inputs and where will I put the indicator lamp to indicate whether the output is logic 1 or 0?
    This is the first time I will be using a software to simulate a circuit.
  2. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    I assume you will put the LED and series resistor on the output.

    As far as input ... use logic levels.
  3. hondabones

    Senior Member

    Sep 29, 2009
    MultiSIM has Logic gates. In MultiSIM 9 & 10 it's under misc. digital. Just use an OR2. (2 input OR Gate). Or if you want to use the circuit you provided, then either way I would do this:

    Vcc = 5 V
    use SPST switches at inputs (closed is High, open is Low)
    under a section called indicators is something called a probe. Pick a color and put this at the output. Probe ON is high, Probe OFF is low.
    Last edited: Jul 10, 2010