PC oscillope circuit

Discussion in 'General Electronics Chat' started by palermo, Jan 16, 2013.

  1. palermo

    Thread Starter New Member

    Jan 13, 2013
    Hi guys, this is my first post on this forum.
    My name is matt and I have just finished the aac books. I was going to build a circuit to use the pc sound card as an oscillope.

    I have a 10k pot and a 100k pot lying around (plus many op-amps). The circuit in the experiments book uses a 10k pot. but a 100k pot would obviously have a greater impedence which would be great for measurements of voltage.

    Is the input impedance of a typical sound card too low to use a 100k pot?
    and if it is, would a voltage follower circuit using as op-amp be benificial or an overkill?

  2. t06afre

    AAC Fanatic!

    May 11, 2009
    Hmm hard to say. Do you have a link to your project