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  1. #1
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    gamepad black conductive compound

    Hello,

    I want to make my own game controler

    so I was wondering, as I would etch the pcb, what is the black stuff they cover button contacts with ?

    I mean I can order rubber buttons replacements online, but about that black dried conductive goo the put on the pcb where the button presses ?

    anyone knows ? is it possible to buy something similar ?

    regards

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    Re: gamepad black conductive compound

    I've seen ordinary copper traces do the job. But those tarnish and become unreliable. My Commodore computers had keyboards like this. They needed to be cleaned every few years.

    The black stuff looks like a dried slurry combining adhesive and carbon/graphite. A homemade version might do the job:

    rosieresearch.com/diy-conductive-paint-recipe/



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    Re: gamepad black conductive compound

    tried yesterday with epoxy and graphite...meh
    I could maybe add some more graphite on top while it dries..but it will wash away

    I found a formula yesterday, but some parts would be hard to find

    I live in europe, so Elmer glue is like super glue or something ?



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    Re: gamepad black conductive compound

    Elmer's is water-soluble, commonly used in school and crafts. White in the bottle. Dries clear, slightly flexible. It turns soft again when exposed to water or heat.



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    Re: gamepad black conductive compound

    I think the stuff you are looking for is supplied on sheets and heated and pressure punched onto the copper. It is a synthetic rubber compound that is heavily loaded with carbon. I do not know of any supplier but in any case it would need a special application tool. It might be worth your while inquiring at a local PCB manufacturer as applying it to PCBs is a fairly common request. They may be able to spare some if they have any.

    Have you considered applying chemical tinning compound, it gives a more durable finish than plain copper and can be applied by dropper exactly where needed.

    Brian.
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.



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    Re: gamepad black conductive compound

    I think you might be thinking of silicon carbon pills like the ones manufactured by this company (the first one I managed to find). There are a number of companies that seem to also mold and entire silicon keypad with the carbon pill section integrated into the rest of the keypad.



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