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Thread: Use bluetooth/RF dongle on keychain for car access

  1. #111
    My Village Called 0l33l's Avatar
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    Quote Originally Posted by superart
    i didnt mean decode the sound. patch into the signal that is sent to the speaker, and send that as an input into the PIC
    Then it would get confused when the alarm is going off. Just easier to tap into the LED. Trust me.

  2. #112
    Constant Bitrate
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    if you have an LED, go for it.

    whatever is the most distinct.

  3. #113
    My Village Called 0l33l's Avatar
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    Quote Originally Posted by superart
    if you have an LED, go for it.

    whatever is the most distinct.
    I'm saying that its much easier in both software and hardware to hack into the LED. I've got both an LED and a siren for my alarm. Its just that using the LED would make it easier to design the PIC.

  4. #114
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    cool, whatever works.

    I just meant to say that you should patch into some sort of signal that indicates weather the alarm is armed or not.

    if the LED is easiest, go with that.

  5. #115
    My Village Called 0l33l's Avatar
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    Quote Originally Posted by superart
    cool, whatever works.

    I just meant to say that you should patch into some sort of signal that indicates weather the alarm is armed or not.

    if the LED is easiest, go with that.
    Ok, so we're on the same page now.

    I'm gonna go sleep. We should think about how to interface this with BT cellphones, because it will make the design much easier (one less hardware thing to worry about). But it has to be fast with cellphones. I don't want to wait 30 seconds for an app to load to pop my trunk

  6. #116
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    yea, im going to sleep too.

    I dont really have any experience with BT cell phones, and my phone doesnt have BT anyway, so I wouldn't have a platform to develope on even if i did.

    Although a cell phone would have much more options and be more customizeable than a simple little dongle with a PIC and a couple buttons. And 1 less thing to cary arround.

    Of course, the cons are, you are more likely to leave your cell phone at home than you are to leave your keys. And if you forget to charge your phone at night, good luck getting to work in the morning. hehehe.

  7. #117
    Variable Bitrate nzKAOSnz's Avatar
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    Quote Originally Posted by superart
    yea, the PIC box we have been talking about for like a while now.

    <edit>
    woot!!! 100th post!!!!!

    I am teh win

    dude- you only have 70 posts...?
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  8. #118
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    on this thread, i meant

  9. #119
    Variable Bitrate nzKAOSnz's Avatar
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    ahh.
    92 Subaru Legacy Wagon

    Epia MII12000 :D
    Morex 80W
    120G External HDD
    16x2 Charater Display
    Creative IR Remote
    VIA Sereniti 2000 Mini ITX Case
    7.2Ah SLA Tank
    PCMCIA 802.11b
    256DDR Ram


    Diamonds are for girls- wise men follow the stars

  10. #120
    Variable Bitrate AlienEclipse's Avatar
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    I like the sound of this project. But i don't think you need blue tooth at all. What you would use is a transponder device (RFID).
    Basically how it works is that you have a controll device which emitts a frequency which remotly powers the transponder key (if in range). When powered the transponder emitts its own code. from the ere the controll device takes that code and spits to whatever. This sort of thing is used for security tagging, door locks (both buildings and cars).

    So you could just use a controller interfaced with a PIC which controlls whatever it needs to. The range is limited to what the transponder key can emitt.

    Some links:
    http://www.rfidinc.com/
    http://www.avea.cc/DIY.htm
    http://www.ti.com/rfid/default.htm
    http://www.secureorderprocess.com/ti/products.asp
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