The item pictured in your attachment likely uses a membrane=20
switch.  See URL below which has a nice illustration on their home=20
page.  I've no experience with nor connection to this=20
manufacturer.  For the 50-100 pieces you need, a custom membrane on a=20
stock enclosure might be a viable solution.

http://www.nelsonusa.com/membrane-switches/


-- Alan


At 01:12 PM 9/5/2012, Neil writes:
 >Of course I forgot the attachment...
 >
 >
 >On 9/5/2012 12:52 PM, Neil wrote:
 >> Question -- how are the "bumps" (domes) of each switch on the front
 >> face here made?  I expect they are "pressed" or molded in with heat,
 >> but is there some standard tool for this that I can buy, or do I have
 >> to custom-machine some positive and negative mold for this?
 >>
 >> FWIW, I recently purchased a printer that can do front-panel type
 >> graphics, so if I can make these domes I'd be most of the way to
 >> making a better/easier custom dual-switch.  Yes I can do these flat,
 >> but that makes the need for height-control more critical.  I'm
 >> thinking I can use 2 layers of PCB (one as a backing with the traces,
 >> and another with just square holes cut out for the switch bodies) and
 >> put a plastic overlay over it with the graphics printed on that.  I
 >> can either print the graphic oversized so that I can fold over the
 >> sides to cover the PCB edges, or dip in plastidip etc first to
 >> coat/hide the edges.
 >>
 >> Cheers,
 >> -Neil.
 >>
 >>
 >> On 9/5/2012 11:31 AM, Neil wrote:
 >>> Haven't done this before, but from what I know, it sounds like it
 >>> would be a bunch of fabrication still. I'm really looking for
 >>> something as ready-to-use as possible. This (attached pic) is what
 >>> I've been doing so far.  2 SMD switches on on this, and a
 >>> custom-printed label covers the top.
 >>>
 >>> Cheers,
 >>> -Neil.
 >>>
 >>>
 >>> On 9/4/2012 3:45 AM, IVP wrote:
 >>>>> it's very time-consuming to make the housings. I need about
 >>>>> 50-100 of these, and really dreading the thought of .....
 >>>> On a couple of occassions I've found it fairly convenient to
 >>>> make silicone moulds (from a wooden master) and cast ad
 >>>> hoc fittings in polyester
 >>>>
 >>>> But I do have those materials to hand for other work
 >>>>
 >>>> Joe
 >>>

--=20
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