Analog signals to Microcontroller

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

  1. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011

    I am planning to do a project which will consist of 5 Playstation joysticks (with a pot on the X axis and a pot on the Y axis) and 5 position sensing potentiometer.ör&hash=item20c4a5b946

    Now my question; is there a microcontroller with 15 Analogue to Digital convertors (ADC) ??
    Or is there another way to solve this without using a microcontroller with 15 ADC inputs ??

    Thanks in advance.
  2. crutschow


    Mar 14, 2008
    Since the joystick output changes relatively slowly, you could likely use one reasonably fast ADC input with a 16-channel multiplexer such as the CD4067. You rapidly sequence the multiplexer through the 15 inputs (for example a 1kHz rate would take 1ms per sample or 15ms for 15 samples), taking an ADC conversion for each sample of the sequence. The multiplexer requires a 4-bit digital address signal from the microcontroller.