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Relays & Powering Opus

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  • Relays & Powering Opus

    First, let me apologize for asking something that's probably been discussed at least a couple of hundred of times (though i cant find anything - Doh!).

    My question is. I originally ran a straight momentary switch right from my Epia MII, and it seems like that is generating some problems with the opus, hence i have to use the remote wire on opus to get it to function properly.

    I'd like to keep my setup as it was (I dont want to power/shutdown an opus automatically on ignition on/off). I'd like to keep control of my computer with my momentary switch. That is:

    1) I'd like to be able to turn it on/off when ignition is off
    2) I'd like to be able to turn it on/off when ignition is on

    Call me stupid, this sounds easy but i cant figure out how to accomplish this with the remote wire and relays (the ignition off is what causes problems).

    Any insight to a electrically challenged one here? hehe
    ----------------------
    VIA Epia II
    256MB 266DDR Ram
    90GB Wester Digital
    Bluetooth/Deluo GPS
    Lilliput 7" Touchscreen
    ----------------------
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  • #2
    you could set up the opus to power down immediatly after the ignition is turned off and use a toggle switch to feed power to the opus to make it think the ignition is on. maybe use a on-off-on toggle, (ignition, off, constant) for more flexibility.
    '99 F-350 Crew 7.3L~'02 F-350 Crew 7.3L~ '04 Dakota SLT+ 4.7L
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    • #3
      I put mine on my head light switch. I always drive with at least my fog lights on. That way I can leave it powered on even if I shut off the car.
      http://soniccobra03.150m.com/Pictures/CobraBanner.jpg

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      • #4
        Right, so in theory if i find a constant 12V source. Could i use my momentary button to trigger the relay on/off.

        *confused*
        ----------------------
        VIA Epia II
        256MB 266DDR Ram
        90GB Wester Digital
        Bluetooth/Deluo GPS
        Lilliput 7" Touchscreen
        ----------------------
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        • #5
          Not really, the relay is not triggered by a momentary pulse, it needs a constant 12v signal. The OPUS stays on when it senses 12v on the blue iginition line, and tries to shut off when it senses 0v. As bridger suggested, what you need is a 3 way toggle switch, you would connect an ignition line to the first input pole on the toggle, constant 12v to the second, and nothing to the third, if the toggle is in the first position, it will only turn the computer on when the ignition is one, the second, it will go on regardless of the cars state, and the third, it will go off regardless of the cars state. The output of the toggle should be connected to the blue iginition line of the OPUS.

          If you want to make a momentary button into a toggle switch, you can do this with a few relays, theres instructions on www.the12volt.com for how to do this, look for a momentary to constant relay circuit.
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          • #6
            Ah! That's what i was looking for. thanks!



            We can engage and disengage the latched output with a single pulse from a switch or an output from an alarm or remote keyless entry. The first pulse from the switch will engage the latch. The next pulse from the switch will disengage the latch.

            Time to pay my local radioshack a visit
            ----------------------
            VIA Epia II
            256MB 266DDR Ram
            90GB Wester Digital
            Bluetooth/Deluo GPS
            Lilliput 7" Touchscreen
            ----------------------
            Mazda 6 Carputter > Click Me!

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            • #7
              i would use a potion switch. center being what ever the ing is.. Down is OFF conected to nothing. and up is 12 right from the battery so dosnt matter if car is on or off
              Pete Kastner www.KastNERD.com

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              • #8
                Originally posted by beaverpants
                i would use a potion switch. center being what ever the ing is.. Down is OFF conected to nothing. and up is 12 right from the battery so dosnt matter if car is on or off
                This helps me because i have a blank momentary switch that i can now use as my acc line switch.

                This might be more appealing:
                2007 Honda Fit Sport 1.5L SOHC-VTEC

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                • #9
                  Nice site, however adding shipping to these.. will defeat the purpose of getting these from them. Especially due to the fact that I'm in Canada.
                  ----------------------
                  VIA Epia II
                  256MB 266DDR Ram
                  90GB Wester Digital
                  Bluetooth/Deluo GPS
                  Lilliput 7" Touchscreen
                  ----------------------
                  Mazda 6 Carputter > Click Me!

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                  • #10
                    wow, i didnt even go that far into the purchase. That shipping is OUTRAGOUS!!!



                    here this should do! jameco
                    2007 Honda Fit Sport 1.5L SOHC-VTEC

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                    • #11


                      works great!
                      ----------------------
                      VIA Epia II
                      256MB 266DDR Ram
                      90GB Wester Digital
                      Bluetooth/Deluo GPS
                      Lilliput 7" Touchscreen
                      ----------------------
                      Mazda 6 Carputter > Click Me!

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                      • #12
                        iG,

                        Forgive me if I've missed something fundamental here, but if you take a look at this thread you may find something a lot simpler that your multi-relay setup. I believe this is waht bridger and god_of_cpu were suggesting.

                        Sorry if I missed something...
                        MikeH

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                        • #13
                          Oh yeah, there are much simpler solutions! Stuff you guys posted is an example of one..

                          The problem with my situation was that i already drilled my panel and installed the momentary button, and I like it there So i decided to go the long way and build this setup instead.
                          ----------------------
                          VIA Epia II
                          256MB 266DDR Ram
                          90GB Wester Digital
                          Bluetooth/Deluo GPS
                          Lilliput 7" Touchscreen
                          ----------------------
                          Mazda 6 Carputter > Click Me!

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                          • #14
                            why on earth would you use so many relays for something that can be accomplished with a simple circuit??
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                            • #15
                              Originally posted by Nic
                              why on earth would you use so many relays for something that can be accomplished with a simple circuit??
                              Because i had them handy. And ****. When i soldered it all together it seemed to work fine, now today I did a test run in my comp and noticed that it works only one way. It allows me to turn it on, but after that doesnt react to anything and just keeps the 12V always on. When i cycle the power i can hear them switch back. So some coils stay energized. asdfhkakjh! Checked wiring a dozen of times, cant seem to find the reason why it's doing this.

                              Any ideas? Faulty relay somewhere?

                              edit:

                              This is really weird. It does turn off the circuit every once in a while, most of the time I just hear relays switching but 12V+ is still supplied. However, there are never problems turning the circuit back on, works perfectly one way.

                              Fhasdfkhl?!
                              ----------------------
                              VIA Epia II
                              256MB 266DDR Ram
                              90GB Wester Digital
                              Bluetooth/Deluo GPS
                              Lilliput 7" Touchscreen
                              ----------------------
                              Mazda 6 Carputter > Click Me!

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