Post by thread:Potting a PIC

At 08:13 AM 11/27/97 -0500, you wrote: >Sorry for my dual posts, just splitting up the questions: > >Can anyone tell me if they have had any success using potting epoxy? >Any good suppliers? Will any high di-electric plastic work? I use the 3M stuff available from Newark Electronics on my water-proof electronic speed controls. Either black or clear works fine. Andy ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================

>>Can anyone tell me if they have had any success using potting epoxy? >>Any good suppliers? Will any high di-electric plastic work? > >I use the 3M stuff available from Newark Electronics on my water-proof >electronic speed controls. Either black or clear works fine. Does 3M makes any solderable barnish ?. I use it to make PCB water-tolerant (not water-proof). The barnish lets you make reworks on the PCB, change cables, etc. Connectors that fits directly in the PCB can be soldered after barnish application (jack connectors, etc). They would probably get locked if using epoxy. Have found this stuff in spray, but would prefer to use it liquid like any wood barnish. Anybody knows who makes it ? Luis Fernandez Cormenzana RadioBit Sistemas, S.L. Vehicle fleet control systems Patrol presence controllers Fax/Tel:+34-6-585 64 57 +34-6-680 26 33 e-mail: spam_OUTradiobitTakeThisOuTdragonet.es http://www.dragonet.es/users/radiobit

>Does 3M makes any solderable barnish ?. I use it to make PCB water-tolerant >(not water-proof). The barnish lets you make reworks on the PCB, change >cables, etc. Connectors that fits directly in the PCB can be soldered after >barnish application (jack connectors, etc). They would probably get locked >if using epoxy. > >Have found this stuff in spray, but would prefer to use it liquid like any >wood barnish. Anybody knows who makes it ? I believe Luis means "varnish." I don't know of solder solderable varnishes. The 3M potting compound I use is NOT solderable afterwards - it melts and smells. It is, however, removable sufficiently for me to replace damaged components (heat) underneath. Andy ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================

In message <.....3.0.1.32.19971129164209.0069571cKILLspam@spam@pop.fast.net>, Andy Kunz <montanaKILLspamFAST.NET> writes >>Does 3M makes any solderable barnish ?. I use it to make PCB water-tolerant >>(not water-proof). The barnish lets you make reworks on the PCB, change >>cables, etc. Connectors that fits directly in the PCB can be soldered after >>barnish application (jack connectors, etc). They would probably get locked >>if using epoxy. >> >>Have found this stuff in spray, but would prefer to use it liquid like any >>wood barnish. Anybody knows who makes it ? > >I believe Luis means "varnish." > >I don't know of solder solderable varnishes. The 3M potting compound I use >is NOT solderable afterwards - it melts and smells. It is, however, >removable sufficiently for me to replace damaged components (heat) underneath. Solder-through varnish is made! I've got an aerosol can of it, made by Electrolube, called Clear Protective Lacquer (CPL). I think that Luis is after it in ordinary liquid form, rather than an aerosol. Leon -- Leon Heller: .....leonKILLspam.....lfheller.demon.co.uk http://www.lfheller.demon.co.uk Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 See http://www.lfheller.demon.co.uk/rcm.htm for details of a low-cost reconfigurable computing module using the XC6216 FPGA

At 07:54 30/11/97 +0000, you wrote: >In message <EraseME3.0.1.32.19971129164209.0069571cspam_OUTTakeThisOuTpop.fast.net>, Andy Kunz ><montanaspam_OUTFAST.NET> writes >>>Does 3M makes any solderable barnish ?. I use it to make PCB water-tolerant >>>(not water-proof). The barnish lets you make reworks on the PCB, change >>>cables, etc. Connectors that fits directly in the PCB can be soldered after >>>barnish application (jack connectors, etc). They would probably get locked >>>if using epoxy. >>> >>>Have found this stuff in spray, but would prefer to use it liquid like any >>>wood barnish. Anybody knows who makes it ? >> >>I believe Luis means "varnish." >> >>I don't know of solder solderable varnishes. The 3M potting compound I use >>is NOT solderable afterwards - it melts and smells. It is, however, >>removable sufficiently for me to replace damaged components (heat) underneath. {Quote hidden}> >Solder-through varnish is made! I've got an aerosol can of it, made by >Electrolube, called Clear Protective Lacquer (CPL). I think that Luis is >after it in ordinary liquid form, rather than an aerosol. > >Leon >-- >Leon Heller: @spam@leonKILLspamlfheller.demon.co.uk http://www.lfheller.demon.co.uk >Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 >See http://www.lfheller.demon.co.uk/rcm.htm for details of a >low-cost reconfigurable computing module using the XC6216 FPGA > > Out of interest, are we talking "conformal coating" here? Adrian WWW WWW Adrian Gothard WWW WW WWW White Horse Design WWWWWWWWWW 0385-970009, 01189-628913/628914, 0976-387778 (obsolete) WWWW WWWW KILLspamwhdKILLspamzetnet.co.uk

In message <RemoveME3.0.3.16.19971130161040.505710a6TakeThisOuTzetnet.co.uk>, Adrian Gothard <spamBeGonewhdspamBeGoneZETNET.CO.UK> writes {Quote hidden}>At 07:54 30/11/97 +0000, you wrote: >>In message <TakeThisOuT3.0.1.32.19971129164209.0069571cEraseMEspam_OUTpop.fast.net>, Andy Kunz >><RemoveMEmontanaTakeThisOuTFAST.NET> writes >>>>Does 3M makes any solderable barnish ?. I use it to make PCB water-tolerant >>>>(not water-proof). The barnish lets you make reworks on the PCB, change >>>>cables, etc. Connectors that fits directly in the PCB can be soldered after >>>>barnish application (jack connectors, etc). They would probably get locked >>>>if using epoxy. >>>> >>>>Have found this stuff in spray, but would prefer to use it liquid like any >>>>wood barnish. Anybody knows who makes it ? >>> >>>I believe Luis means "varnish." >>> >>>I don't know of solder solderable varnishes. The 3M potting compound I use >>>is NOT solderable afterwards - it melts and smells. It is, however, >>>removable sufficiently for me to replace damaged components (heat) >underneath. >> >>Solder-through varnish is made! I've got an aerosol can of it, made by >>Electrolube, called Clear Protective Lacquer (CPL). I think that Luis is >>after it in ordinary liquid form, rather than an aerosol. >> >>Leon >>-- >>Leon Heller: leonEraseME.....lfheller.demon.co.uk http://www.lfheller.demon.co.uk >>Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 >>See http://www.lfheller.demon.co.uk/rcm.htm for details of a >>low-cost reconfigurable computing module using the XC6216 FPGA >> >> > >Out of interest, are we talking "conformal coating" here? > >Adrian No, it's different. I've also got a can of Electrolube HPA Conformal Coating. Leon -- Leon Heller: EraseMEleonlfheller.demon.co.uk http://www.lfheller.demon.co.uk Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 See http://www.lfheller.demon.co.uk/rcm.htm for details of a low-cost reconfigurable computing module using the XC6216 FPGA

> Can anyone tell me if they have had any success using potting epoxy? > Any good suppliers? Will any high di-electric plastic work? I've used Devcon Flexane (TM) 94 liquid 15250 with good luck. The stuff is a two part urethane available in the US at industrial supply and industrial plastics houses. Black. Opaque and seems not to screw up 4Mhz resonators. It works well in molds, just use some liquid floor wax on the mold halves to prevent adhesion. Cheers, Win Wiencke Image Logic Corporation RemoveMEImageLogicEraseMEEraseMEibm.net