Switch through case ?

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3v0

Coop Build Coordinator
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How do you setup switches on a PCB that work from outside a case?

I am using the switches that mount to the PCB. I would like to activate them from outside the case. Indoor use, small is good.

Is there a right/easy way to do this or will it work to drill a hole and stuff a matching plastic rod into it, maybe a rod in a tube epoxied to the case. Mushroom the underside of the rod to keep it from falling out. The space between the case and the top of the switch will be 2 or 3 mm. I have some adjustment here. Maybe someone make an button insert that pops into a hole to push the button?

The case is a Hamond with a wall thickness of 2mm.
The switches are E-Series Tactial Switch 6.4X5.0MM 130G switches.
Mouser 612-TL1107BF130W DataSheet
 
How often will you need to press the buttons? If it's rarely or infrequently, just drill holes and poke something through. Glue a small piece of tubing (guts out of an empty ballpoint pen) to the button.
 
Frequently. Working on putting a
Mondo
SuperPobe
into a case. Got the board so that it can be built DS or SS with 4 jumpers.

EDIT:
The glue thing got me thinking. What I need to do is find switches with studs/buttons that are long enough to stick up through the case.

When consumer goods uses this sort of switch the custom case provides the mechanism to push on the switches.
 
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I've swipped some from a VCR before, or you could get some like these at Digi-Key

**broken link removed**
 
How about the little plastic pieces that explode out of a remote or calculator when you pry them open? Don't know how you would drill a rectangular hole, maybe a dremel and a small router type bit.
 
Good idea. I chucked all the unneeded ones when I move. Maybe the thrift store has some.
 
Since your PCB is so close to the surface of the enclosure, you could drill a hole directly over each switch and drop in a plastic ball (Wal-Mart and craft stores such as Hobby Lobby have all sorts of beads and balls in their crafts/scrapbooking sections). Cover with a nice, thick polyethelyne strip using double-sided tape. The accessory bags that came with Hewlett-Packard test equipment was wonderful stuff for such applications.

Dean
 
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