30 Dec '12, 11am

Potting electronics with silicone

Look up conformal coating – it isn’t expensive. If you have a reasonable supply of water, you can produce boards as good as any manufacturer who doesn’t use a clean room. After you make the board and shield the IO/Power connectors, you need to obtain some saponifier. These make water wetter and can be bought from many places in small quantities. It is amazingly close to a certain dish detergent that leaves things “virtually spotless”, and which works well enough for most purposes if you have access to dishwasher. In either case, run the boards through a dishwasher and dry them. Then bake them in an oven @200F for a while (think about your solder’s melting point and work backwards) – or set it to 125 or 150 and leave it for a few hours. The goal is to bake out any residual moisture. After that, purchase any conformal coating – it’s sold as such, and comes in a spray can. On...

Full article: http://hackaday.com/2012/06/04/potting-electronics-with-s...

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