Hi, I've sucessfully potted circuits in the 2 part plastic resin used for making paper weights. (commonly found in better craft stores or by mail order.) It takes laying them up in layers to get anything with any volume, but it's dooable. Key caps would be only one layer. You can also color the stuf, but I forget what you use. I do remember one of the coloring agents sounded like it would make it conductive. I never used the coloring agents. For buttons you could make a mold and inject the stuf with a large syringe (only good for one batch) or you could use an open back mold and just pour it in then trim later. The stuf will heat up some durring cure, but it isn't enough to destroy a chip, however you don't want to run the circuit while it's still curing as then you will be over temp. You must use mold release compounds or mold materials it won't stick to. > I'm investigating potting materials, I suspect I could probably make, or > teach someone else to make, custom key caps for this sort of thing in > small batches, shortly. (Think, paste a letter to the "top" of each > keycap with epoxy, then pot the rest of the cap - set the whole "plate" > in a small centrifuge to remove bubbles - Grind the keys to uniform > height; That sort of thing. Clear epoxy resins probably would do. > Those who touch type wouldn't need the key caps, those'd be cheaper. > Lot of hand work to do there!) -- | Bryan Andersen || http://softail.visi.com | | Buzzwords are like annoying little flies that deserve to be swatted. | | -Bryan Andersen | -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" to
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