Re: Tiny SMD switches or tact switches for silly emulator project?

On 16 Jan 2006 20:09:53 -0800, zwsdotcom@xxxxxxxxx wrote:

>Tried this in comp.arch.embedded, moving my search further afield...
>
>I'm trying to build a PDP-1 emulator on a 90x55mm business card. As
>readers skilled in the art will appreciate, this is an eminently
>practical project, the general applicability and consumer utility of
>which are precisely commensurate with the profits I expect to realize
>from the endeavor.
>
>The front side of the card contains the front panel. 0603 LEDs for the
>lamps are fine, but I am having trouble finding switches small enough.
>Smallest tact switches I can find are 6x3mm. Can anyone point me to
>smaller tact switches? My other option is 0.050" spacing DIP switches,
>which are harder to operate and have a shorter lifespan.

Omron do some 4mm dia. domes (B3D-4112).
ITT Cannon do a side-actuated one with a 1.66x3.5mm profile x 5.5mm wide - if you could find a way
to stack these maybe they would be worth a look. KSS221G

Also look at people like ALPS, but obtaining small qtys may be tricky. Perhaps investigate dead
digital cameras/mobile phones....
.