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Looking for a schematic for the momentary led push button switch.

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  • Looking for a schematic for the momentary led push button switch.

    I am just trying to find a schematic for the LED momentary push button switch that I ordered from the MP3car online store.. I cant get the LED to illuminate. The switch does work though it does not illuminate.
    Thanks.

  • #2
    Originally posted by sil180sx View Post
    I am just trying to find a schematic for the LED momentary push button switch that I ordered from the MP3car online store.. I cant get the LED to illuminate. The switch does work though it does not illuminate.
    Thanks.
    Did it come with a wiring diagram on how to hook it up?
    1999 Mercury Grand Marquis GS with: ASRock E350M1 w/4GB RAM, 80GB Intel SSD, Opus DCX3.120, Visteon HD Radio + HDR-USB, PL-18N wifi, OBDLink Scan Tool, BTA6210 BT, BU-353, Win 7 Ultimate, CF 4.0, Alpine MRP-F240 + MRP-T220, RF Punch 1572s, Kicker 8" Comp.

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    • #3
      Originally posted by kegobeer View Post
      Did it come with a wiring diagram on how to hook it up?




      No it did not ...

      Though I figured it out.. Basically the two center connections + and - are to illuminate the switch.. However it does not make much sense because you would need to have that connection switched...

      Then connections 1&2 and 3&4 are switched when pressing the button.

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      • #4
        the idea behind a switch like this is that the switch stays illuminated no matter what to allow to easily locate the switch-- many automotive-specific switches are as you describe, where the led is only lit while the switch is on..
        My OLD 2001 Mitsubishi Eclipse GT:
        "The Project That Never Ended, until it did"


        next project? subaru brz
        carpc undecided

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        • #5
          Originally posted by soundman98 View Post
          the idea behind a switch like this is that the switch stays illuminated no matter what to allow to easily locate the switch-- many automotive-specific switches are as you describe, where the led is only lit while the switch is on..
          That's what I want - a button that stays lit even when the car is off. Talk about not designed for automotive use. I'd install a relay that's tied to the ACC/IGN so that it's not illuminated when the key is off.

          Hey mp3car - who sells a switch without some sort of wiring instructions? Not everyone has experience with automotive switches...
          1999 Mercury Grand Marquis GS with: ASRock E350M1 w/4GB RAM, 80GB Intel SSD, Opus DCX3.120, Visteon HD Radio + HDR-USB, PL-18N wifi, OBDLink Scan Tool, BTA6210 BT, BU-353, Win 7 Ultimate, CF 4.0, Alpine MRP-F240 + MRP-T220, RF Punch 1572s, Kicker 8" Comp.

          Comment


          • #6
            Originally posted by kegobeer View Post
            Hey mp3car - who sells a switch without some sort of wiring instructions? Not everyone has experience with automotive switches...
            i completely agree-- and assumed that it came with some sort of connection diagram until another recent post.. they need to at least post a pinout diagram in the technical documentation area of the product...
            My OLD 2001 Mitsubishi Eclipse GT:
            "The Project That Never Ended, until it did"


            next project? subaru brz
            carpc undecided

            Comment


            • #7
              They also need to update their sales page so that people know this will stay lit all the time, so people aren't surprised when they leave for a week and come back to a dead battery.

              Honestly, did anyone review the ad or the product packaging?
              1999 Mercury Grand Marquis GS with: ASRock E350M1 w/4GB RAM, 80GB Intel SSD, Opus DCX3.120, Visteon HD Radio + HDR-USB, PL-18N wifi, OBDLink Scan Tool, BTA6210 BT, BU-353, Win 7 Ultimate, CF 4.0, Alpine MRP-F240 + MRP-T220, RF Punch 1572s, Kicker 8" Comp.

              Comment


              • #8
                LOL!

                The beauty of having the lighting independent of the switch, that way you chose if lit full time, or when on, or when off.
                (I don't mind pre-configured, but it should be user changeable! Not to mention being able to use other voltages.)

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                • #9
                  I have an idea that should work.. Though I wont be able to test until later.. If I tap into the the cluster lighting for the 12 volt power then the button would illuminate only when I had the lights on. Which would be the only time I would really need it illuminated.

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                  • #10
                    Alright it is confirmed, though the lighting on my vehicle (2005 Mitsubishi Montero Limited) works a bit differently causing the LED push button to fully illuminate when the dimmer is turned down all the way, and oppositely dim when the dimmer is fully illuminating the dash lights. Oh well a good medium will suffice for both the dash and button..

                    In case the question arises.. Yes I attempted to reverse the polarity through the switch though no change. The dash lighting throws 12V both ways across the instrument illumination.. Making me wonder if all the lights are operating with a special diode that allows voltage to pass by removing removing voltage.. ??

                    Oh well, it works..

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                    • #11
                      It sounds like a resistive dimmer, and that you need to connect transfer the LED connections - ie, instead of +ve to +12V and -ve to dimmer, +ve to dimmer & -ve to GND (or vice versa).

                      (Not that resistive dimmers work well for LEDs, but with bulbs this is effectively a "voltage" dimmer.)
                      (And on 2nd thoughts, it should be the same for modern (PWM) dimmers....)

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                      • #12
                        FYI - PWM dimmers seem common in modern Jap vehicles.
                        I pulled a couple from 1995 & 1996 Hyundai Excels. They use a 10A switching MOSFET and appear to be PWM because there is negligible heat when dimming a 50W halogen bulb, and a parallel 12V LED dims in proportion.

                        I might find out how to reduce it lower dimming limit but otherwise probably won't bother deciphering the circuit - I think it's easier transplanting my old 555 circuit which uses ~10 fewer components, but the same 10k pot and FET switching.

                        It has a +12V & GND connection with the output being GND PWM dimming (ie, LEDs & lights to +12V and grounded through the dimmer's 3rd terminal).

                        I have little doubt similar circuits feature in other Jap vehicles...

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                        • #13
                          ^ those have become a quiet led hobbyist trick-- to pull the oem pwm units from import cars...
                          My OLD 2001 Mitsubishi Eclipse GT:
                          "The Project That Never Ended, until it did"


                          next project? subaru brz
                          carpc undecided

                          Comment


                          • #14
                            Phew! Good to see!
                            I've had no need - I've had my old circuit etc. (It's now 4 years since I disassembled my 12V camping fluoro to insert my dimmer that was scheduled for ~6 years ago!)
                            And IMO it's kind of surprising considering the... er, "debate" I had a few years back with an "experienced expert" installer etc on here... (At least this "reality" was only 10 years ahead of my debatees unlike fresh graduates that have been 20 years behind!)


                            But it was only whilst accompanying a mate to a wreckers that I happened to notice... and thought...
                            Oh dear - I forgot to find out their price....


                            But as a convenient matchbox-sized ready built PWM dimmer - and I suspect easily upgradable to 100A...
                            I might just reassemble my flouros. Make series plug-in dimmer instead... (Yeah, why get up to dim a light when the dimmer cam be beside you. Geez I'm so stupid....!)


                            And I like the "quiet led hobbyist trick". Oh poo - should I delete all now?
                            But yeah, there are those that know and watch the others....

                            For me it confirms the brilliance (pun intended) that I know some have. And I skip any dim-wit.

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                            • #15
                              Hallelujah! I thought I was the only one going through this!
                              I too was able to get the buttons to permanently light. However, is anyone familiar with getting them to light when the device (i.e. Mac Mini) is on? Any input is greatly appreciated!!
                              All systems are a go...
                              Currently in "tweaking" mode.

                              The Worklog

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