display 4 digits using two 7 segment displays

Discussion in 'Homework Help' started by Mario Emad, Feb 17, 2009.

  1. Mario Emad

    Thread Starter New Member

    Feb 17, 2009
    Assuming that it's Common Anode, and I want to display a 4-bit no.(with switches) on two 7-segment displays , how?
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    You are urged to always start a new thread with each question. Placing your topic in an existing thread can be confusing.

    This is the old thread - http://forum.allaboutcircuits.com/showthread.php?t=15473.

    As in things electronic, there are always more than one way to get there. The hard way would be to use 14 SPDT switches and switch betenn two pairs of drivers. Another way is to use multiple pole rotart switches and shift the source of the data to one pair of decoders.

    We have no idea of the arrangement of elements in your circuit, so a sensible answer becomes difficult. What is the circuit? Is it multiplexed? Is there a reason why adding two more displays is not possible?