12V to 5V TTL conversion?

Discussion in 'General Electronics Chat' started by a_tharwat, Aug 4, 2006.

  1. a_tharwat

    Thread Starter New Member

    Aug 4, 2006
    1
    0
    hi there, this is my first post here.

    I am trying to figure a way to use analog to digital converter IC (adc0808) with an input signal that is not TTL compatible. The datasheet shows that the input signal must be TTL while my signal is 12V.

    Can anyone think of an accurate way of conversion? Thanks alot in advance.
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,178
    1,799
    The only thing that comes to mind is a line receiver such as a 26LS32. They come four to a package, you can set the threshold, and the outputs can be tri-stated.
     
  3. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
  4. nomurphy

    AAC Fanatic!

    Aug 8, 2005
    567
    12
    An op amp with a gain of ~0.416.
     
Loading...