His main issue was heat on the device, when curing. But I pointed out if m= oisture got under the glass (wash down area potentially) then how would he = replace it. I believe he is now going to remote mount it in a waterproof b= ox and allow the users to plug into it when necessary. Thanks for all the replies. --- On Thu, 9/17/09, Isaac Marino Bavaresco w= rote: > From: Isaac Marino Bavaresco > Subject: Re: [EE] LCD that can be potted > To: "Microcontroller discussion list - Public." > Date: Thursday, September 17, 2009, 6:46 AM > M.L. escreveu: > > On Thu, Sep 17, 2009 at 9:14 AM, alan smith > wrote: > >=A0=A0=A0 > >> So far...my research tells me that LCD modules > can't be potted, or at least most vendors have told me they > can't.=A0 My client needs a 2x16 character display with > the potting all the way up to near the top of the module, so > the electronics are sealed.=A0 Of course I did point out > to him that there is a good chance of the moisture getting > between the glass and the actual LCD as well, so perhaps its > not really a good idea.=A0 The electronics are potted for > enviromental, not security of the design. > >> > >> Has anyone potted a LCD ? > >> > >>=A0 =A0=A0=A0 > > > > It sounds like you want to pot it in epoxy? > > What's the problem? Have you tried? I doubt the LCD > vendor has > > actually tried, or they asked their apps engineer and > he said "eh, I > > wouldn't do it" > > > > You'll have to pull a vacuum if you want to get rid of > air bubbles. In > > fact, I can see that being the major obstacle other > than finding > > acceptably clear potting compound that won't damage > electronics in the > > long-term. > > > > -- > > Martin K. > = > Don't forget the heat. Most potting compounds heat a lot > when curing, > and the LCDs are very sensitive to heat. > = > I've seen LCDs that got heated, and while they are hot the > image get > darkened, almost unreadable. The surface becomes black/dark > blue. > If the heat is not too severe, some LCDs recover their > properties after > cooling, but I've seen some that remained dark or stained. > = > Regards, > = > Isaac > = > __________________________________________________ > Fa=E7a liga=E7=F5es para outros computadores com o novo Yahoo! > Messenger = > http://br.beta.messenger.yahoo.com/ = > = > = > -----Inline Attachment Follows----- > = > -- = > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > = = -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist