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Lilliput buttons light up with car lights on?

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  • Lilliput buttons light up with car lights on?

    I did a on this and didnt find anything...

    but does anyone know if there's a way to rig the lights on the lilliput to turn on with your car light? the car is a 12V supply and the leds are probably 3.8 or so, so with a resistor, i could see this being a real possibility.

    Alternatively, i woudn't mind the lights to be "always on" instead of "on-during-press".

    I dont have the electrical background for insight into this problem. Can anyone help?

  • #2
    I remember reading about someone doing this and posted how they did it... can't seem to find it, maybe someone else knows of this post or perhaps I'm dreaming.

    Edit: I'm not dreaming here it is that someone talks about it: http://www.mp3car.com/vbulletin/showthread.php?t=32298
    Remember AllAdvantage From 7 years ago? IT IS BACK! Now under a new name Agloco
    GET PAID TO SURF THE INTERNET

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    • #3
      To keep the Blue LEDs on all the time, connect pin 12 to pin 8.
      This information was taken from http://www.tmz.com/wrx/lilliputLCD.html close to the bottom of the page.
      Installed
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      • #4
        If you throw a relay between the connection from pin 12 to pin 8 (as shown on this site,
        you could then trigger the relay when the headlights are on.
        This would give you the blue LED's only when the lights are on...
        CarPuter: Dell P3-500 Laptop; D-Link WiFi; Deluo GPS; D-Link Radio; iMac DVD w/ ide2usb
        Audio: Audigy 2 NX; Kicker KX700.5 amp; 20w center amp; Kicker L7 10" Sub
        Display: Lilliput 7" TouchScreen
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        • #5
          What if you wanted them controled by the headlight switch. couldn't you just take a lead from your headlight switch add a resistor to step it down to ~4.5 volts and solder it to one of the pins.

          The question is what pin would apply the 4.5 volts to, to make the blue LED's stay on based on the head light switch.

          Any EE want to help out here
          -Jesus- King of Kings Lord of Lords

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          • #6
            hm, pat (wrx webmaster) seems to live near me. i think i may pay him a visit.

            Thanks for the suggestions guys.

            I think antimatter has an interesting suggestion. If we go with the same resisters that are typically used for car led conversions, then could i wire a tiny 471 resister in series to the connection point (pin 8?) from my parking light 12v power?

            Or would it be better to do the relay route with the same line as squid suggested?

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            • #7
              Do you mean you want them to dim with the headlight switch or just come on with it?

              Cause my solution above will do the latter. You have the 12 volts coming from switch trip
              the relay which closes the line between pins 12 and 8 thus turning your blue LED's on.

              I feel this is alot safer also, because your not adding grounds or voltage to the lilliput
              circuitry which avoids any accidental shorts

              As far as dimming goes, that's another whole circuit... LED's don't dim easily..
              very small voltage area where the light actually dims some before it just shuts
              off. That's where the E.E. steps in and this M.E. steps out
              CarPuter: Dell P3-500 Laptop; D-Link WiFi; Deluo GPS; D-Link Radio; iMac DVD w/ ide2usb
              Audio: Audigy 2 NX; Kicker KX700.5 amp; 20w center amp; Kicker L7 10" Sub
              Display: Lilliput 7" TouchScreen
              CarPuter Install

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              • #8
                Originally posted by Squid
                Do you mean you want them to dim with the headlight switch or just come on with it?

                Cause my solution above will do the latter. You have the 12 volts coming from switch trip
                the relay which closes the line between pins 12 and 8 thus turning your blue LED's on.

                I feel this is alot safer also, because your not adding grounds or voltage to the lilliput
                circuitry which avoids any accidental shorts

                As far as dimming goes, that's another whole circuit... LED's don't dim easily..
                very small voltage area where the light actually dims some before it just shuts
                off. That's where the E.E. steps in and this M.E. steps out
                I was referring to the on off switch not the dimmer

                After discussing this with a couple of EE at work here your relay idea is the best.

                I have never used relays... ever. Would anyone care to draw me up a diagram or point me to a suitable relay?

                Thanks
                -Jesus- King of Kings Lord of Lords

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                • #9
                  use PWM for the dimming. how to actually implement that is a different story
                  Mazdaspeed Car Computer
                  gotta redo it all

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                  • #10
                    Relays are a very powerful tool... (lol.. that statement kills me)

                    But really are useful...

                    You can learn the fundamentals at the12volt which will get you started...

                    My own words...
                    Relays are just "switches" that you throw with another "hot" line.
                    You spec a relay for whatever voltage you need to trip it, and that the current
                    you will be flowing thru it will not destroy it. (basically)
                    It keeps different circuits separate. i.e. I use a 5 volt relay hooked to the ps2
                    port on my laptop to trip a 12volt circuit from letting the laptop shut off...
                    And most relays (not all) have NO or NC (normally open or normally closed)
                    which allows your result to either disconnect the line or connect the line however
                    it's wired...

                    Now after my ramblings... u should be confused.. just goto the the12volt page
                    and the pictures will show u right

                    I'm sure others will join in with their explanations...
                    CarPuter: Dell P3-500 Laptop; D-Link WiFi; Deluo GPS; D-Link Radio; iMac DVD w/ ide2usb
                    Audio: Audigy 2 NX; Kicker KX700.5 amp; 20w center amp; Kicker L7 10" Sub
                    Display: Lilliput 7" TouchScreen
                    CarPuter Install

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                    • #11
                      Oh.. and for the lilliput, you just need a small light duty 12 volt relay...

                      Radio shack has a Mini Relay HERE that would work nice...
                      A standard Automotive Type relay HERE that is used throughout your
                      vehicle and can withstand a heavy amp load is sorta overkill.

                      Radio shack is so overpriced on these items tho... I get all my tinker toys
                      from Jameco such as THESE which work great and are only $1.09.
                      You spend 10 mins on that site.. keep adding to your cart and it's only like $20 and
                      you get all kinda new electrical goodies (that's what always happens to me!)

                      -Squid
                      CarPuter: Dell P3-500 Laptop; D-Link WiFi; Deluo GPS; D-Link Radio; iMac DVD w/ ide2usb
                      Audio: Audigy 2 NX; Kicker KX700.5 amp; 20w center amp; Kicker L7 10" Sub
                      Display: Lilliput 7" TouchScreen
                      CarPuter Install

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                      • #12
                        so since pin 12 is just ground...you could just tap into the wire without cutting them, in doing so the lights will still come on when you press buttons....when your headlights arent on....this way you could bring it in the house and work on it...and still have buttons that lightup.
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                        • #13
                          Originally posted by Squid
                          Relays are a very powerful tool... (lol.. that statement kills me)

                          But really are useful...

                          You can learn the fundamentals at the12volt which will get you started...

                          My own words...
                          Relays are just "switches" that you throw with another "hot" line.
                          You spec a relay for whatever voltage you need to trip it, and that the current
                          you will be flowing thru it will not destroy it. (basically)
                          It keeps different circuits separate. i.e. I use a 5 volt relay hooked to the ps2
                          port on my laptop to trip a 12volt circuit from letting the laptop shut off...
                          And most relays (not all) have NO or NC (normally open or normally closed)
                          which allows your result to either disconnect the line or connect the line however
                          it's wired...

                          Now after my ramblings... u should be confused.. just goto the the12volt page
                          and the pictures will show u right

                          I'm sure others will join in with their explanations...
                          Thanks for the links and the info. I have been in the12volt before but never really looked into the relays. I will do some reading...but if someone wants to draw me a diagram and save me some time i wont stop them
                          -Jesus- King of Kings Lord of Lords

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                          • #14
                            Here is a quick sketch

                            standard relay setup.. normally open/normally closed...

                            (middle of watching movie... just wanted to help quickly )
                            Attached Files
                            CarPuter: Dell P3-500 Laptop; D-Link WiFi; Deluo GPS; D-Link Radio; iMac DVD w/ ide2usb
                            Audio: Audigy 2 NX; Kicker KX700.5 amp; 20w center amp; Kicker L7 10" Sub
                            Display: Lilliput 7" TouchScreen
                            CarPuter Install

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                            • #15
                              Thanks man... You rock!!!
                              -Jesus- King of Kings Lord of Lords

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