Digital Multiplexer

Discussion in 'General Electronics Chat' started by Tahmod, Feb 24, 2013.

  1. Tahmod

    Thread Starter New Member

    Feb 23, 2013
    Hi everyone,
    Basically, I want to build a 4:1 multiplexer, with one input providing a 5volts to the multiplexer, with another input providing 2.5V and another one to provide a -1.5volts and the last one providing a 0Volts.

    I know how to build a multiplexer, the problem is that I dont know what I need to connect to the input to provide 5Volts, what I need to connect to the input of the second to provide 2.5V...
  2. Wendy


    Mar 24, 2008
    The Completed Projects Forum is for Completed Projects only. It is meant to allow members to show plans for projects they built so other members can duplicate them if desired. New threads are also automatically moderated per Moderator review for this reason. Your thread does not belong in this forum, and was moved here.
  3. tshuck

    Well-Known Member

    Oct 18, 2012
    Why would you want to provide a digital multiplexer inputs that are out of the logic range? The multiplexer will only output signals that lie within it's logic range, 0 or 1.

    If you need to pass various voltages to a common point, use an analog multiplexer.

    As far as supplying the voltage, a potentiometer voltage divider will supply voltage, but you will not get much current capabilities.
  4. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    Are you sure you mean Digital Multiplexer, or are you talking about an R2R Resistor ladder to get the various voltages from a 5V input?