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I use clear nail polish, or the fast dry minwax polyurethane in the spray paint can (stuff they use to protect hardwood floors)Apply a coat, let it dry, then maybe 2-3 more coats and voila...instant conformal coating and no need to heatshrink or use hot glue
I use clear 2 part epoxy on my pen drives, coat them then stick the case back on..man are they protected after that
Can you put your .brd on OSHPark?
Believe it or not, a simple tiny drop of clear silicon (GE silicon II or whatever) or even 2 part epoxy (like JB Quickweld works great...just make sure you use a VERY thin layer, once bonded, they ain't coming off and thermal resistance is minimal (heat has to go thru the plastic case anyway) if you use a thin layer.
Ever thought of taking SPI out of the Atmega 168 directly to a MAC enabled ethernet chip?http://www.microchip.com/wwwproducts/en/en022889
Correction the Wiznet W5100 ethernet http://www.wiznet.co.kr/product-item/w5100/
Conformal coat the boards with clear nail polish on initial purchase and on repair...the electronics and connections will last MUCH MUCH longer
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