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Thread: Cheap way to PC read 12v signals?

  1. #1
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    Cheap way to PC read 12v signals?

    Hello all,

    Is there any cheap way to the carpc read 12v signals from the car?

    What I want to do is make carpc aware of 4 or 6 signals in the car, like doors open, 4x4 mode, headlights one, etc. is there any cheap way?

    I was thinking in using a serial to usb adapter, but how wire the serial to the 12v peripherals? And how about the software ?

    Thanks for any help!
    Osvaldo

  2. #2
    Newbie
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    Jul 2010
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    Have a look at arduino's. Pretty cheap mictrocontrollers that you can program to read digital signals. That's what im using but atm its not complete.

    http://www.arduino.cc/

    More google searches will reveal alot more and its pretty easy to learn.

  3. #3
    North of the land of Hey Huns
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    I believe there are even optoisolation shields for the arduino, so you can plug 12v signals right in.
    "stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
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  4. #4
    Raw Wave
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    Rather than serial - maybe a USB to (bidirectional) parallel interface.
    That'll take at least 8 inputs, plus the handshakers (another 2-4 lines?).
    Else use the 8 data to encode 63 inputs....

    I've seen para2USB for $10 upwards, but their RRP is usually ~$30-$70 hence making Arduino attractive.
    The Arduino Duemilanove has 6 analog & 14 digital I/O ports (and USB interface)...
    That's probably the way to go,

  5. #5
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    Bought one brain fusion to test (bought a semi defective one for us$ 20 + s&h). lets see what can they do.

    Thanks for the info!

  6. #6
    Maximum Bitrate boelle's Avatar
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    there is also the usb io box from mitch with 4 input and 4 relays
    Blessed are the "cracked" for it is they who let in the light.

  7. #7
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    well, let me see

  8. #8
    MySQL Error scott_fx's Avatar
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    having the arduino and the mjs-io's. arduino's are amazing but harder to set up and integrate. mitch's device is uber simple and work so well with RR.
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