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Thread: Control OEM radio from my head unit

  1. #1
    Newbie
    Join Date
    Oct 2008
    Posts
    9

    Control OEM radio from my head unit

    Hi

    I have same questions about Fusion brain.

    I want to control my oem radio with carpc.(ON,OFF,CD,......)
    This is oem radio plate.


    I want to control this push buttons with fusion brain.
    I m solder wire for each button.

    For do that if i must buy fusion brain and relay for each button?

    Sorry for my english.

  2. #2
    Fusion Brain Creator
    Join Date
    Mar 2005
    Posts
    2,221
    Quote Originally Posted by boy36 View Post

    For do that if i must buy fusion brain and relay for each button?

    Sorry for my english.
    To do that, you need 1 fusion brain (can handle 16 relays) and then 1 relay for each button

  3. #3
    Constant Bitrate
    Join Date
    Jun 2004
    Posts
    149
    May not need relays - they're probably all 12V low current. Hard to determine that for sure though.

  4. #4
    My Village Called 0l33l's Avatar
    Join Date
    Jul 2004
    Location
    Berkeley, CA
    Posts
    10,516
    I'm using optoisolators for controlling the push buttons for my HVAC unit. This is essentially the same problem as you're having. I just hooked up a 1kOhm resistor to pin 1 of my optoisolator (LAA110 - http://www.clare.com/home/pdfs.nsf/www/LAA110_R09.pdf/$file/LAA110_R09.pdf). It seems to work really well, when the digital output on the fusion brain goes high, the optoisolator (or a solid state relay) connects the terminals, emulating a push button

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