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Pushbutton advice

Discussion in 'Electronic Components' started by [email protected], Mar 21, 2005.

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  1. Guest

    Yes, the humble SPST momentary NO pushbutton, the type with a threaded
    collar and nut, panel mount 1/4 inch or so.

    I'm trying to find out what people use these days for input to
    microcontroller based projects in small metal boxes.

    Here are my problems:
    1) The weight of the project box is so low, that even the smallest
    pushbuttons don't actuate because I end up pushing the box instead of
    engaging the contact. It sounds silly until you experience it.

    2) The current is so low that oxidation build-up doesn't get cleaned
    and I have to press even harder. I hate that because it makes stuff
    feel cheap, and it's terrible if you have a software controlled power
    switch that won't work anymore...

    What's a good button to use these days? I've got lots of switches in
    my lab, but the problem is how to mount them easily in metal boxes.
    The mouse-style clicky buttons need a PCB and/or mouting hardware,
    pressure-sensitive switches are limited in choice and need a slot in
    the box (I can only do nice round holes with a multi-bit, I'm not
    equipped for slots)

    It's difficult to find data on activation force and contact material
    these days. It's always "contact the factory" and "how many thousands
    do you need?" Maybe I should just use those infrared sensors on hand
    dryers and high-end faucets, and just wave my command to my box?

  2. mc

    mc Guest

    Radio Shack sells a box with a ready-to-use membrane keypad on it. Maybe it
    will do the job.
  3. Stuff

    Stuff Guest

    Thanks, I'll look into it .
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