Comparing 4 analogue signals

Discussion in 'Embedded Systems and Microcontrollers' started by Hliu, Nov 4, 2008.

  1. Hliu

    Thread Starter New Member

    Nov 4, 2008
    Hi, I'm a PIC newbie/hobbyist, and I'm currently doing a project that requires comparison of 4 voltage levels ranging from ~1v - 5v. So I was wondering if it can be done by using PICs and programming, specifically the PIC16F84A. If it's not possible then can someone recommend me a way to go about it?

    Thanks in advance.
  2. mik3

    Senior Member

    Feb 4, 2008
    With this PIC you cant do it because it has not built-in ADC. You can connect external ADCs but is easier to work with a PIC with built-in ADC like the PIC16819. Its not the only one, you can search for other PICs at
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    You can also use a quad voltage comparator, although circuit and signal details would help.
  4. gvr_p

    New Member

    Nov 5, 2008
    better use another member from PIC family better PIC16F72 which has built in ADC