> > Is there any reason you couldn't use acrylic or polycarbonate > > for nixie-tube type things ? As long as they didn't get too hot.... > > A pluggable LED nixie tube ? > > Heat wouldn't be an issue with proper spacing I haven't played with Nixie tubes for a long time - just wondered about the heat generated by the filaments (Mike Harrison would know - he's got a Nixie tube page) > Looking at google results for out-gassing polycarbonate though... I'd imagine that acrylic would probably give off free monomer at temperature. You can certainly smell MMA if you saw it. Not sure about polycarbonate though. Have the perception (with absolutely no evidence to back that up) that it's more stable and/or more fully polymerised Still, if you were able to enclose LEDs in any plastic heat wouldn't generally be a problem. Potting in clear resin might be a little tricky if you used Luxeons, but the silvering could be a "feature" ;-) A tip I learned a long time ago when woodworking. If you make a mistake, make a deliberate one just like and turn them into a "feature", just as if you'd planned it all along -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist