Google on "Wetting current". I've seen gold-on-gold go intermittent witho= ut sufficient current flowing. -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO =A080301 USA phone:=A0303-417-1345 =A0x110 email:=A0david.vanhorn@backcountryaccess.com=A0 -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of Bob Bl= ick Sent: Friday, November 15, 2019 11:58 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] Not so good connectors, gone bad Very interesting. Looks like gold plating might not be an impossible dream.= I'm going to try to track down a set of replacement connectors and see if = I can plate them. Thanks! Bob ________________________________________ From: piclist-bounces@mit.edu on behalf of mad.sc= ientist.at.large Sent: Friday, November 15, 2019 10:28 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] Not so good connectors, gone bad You might try these, at least for the pins . I us= ed these once years ago and they were great. Looks like there are other co= mpanies doing this now. Depending on the design, they may be useful for pl= ating the socket side. -- "The whole world is watching! The whole world is watching!" Nov 15, 2019, 17:10 by bobblick > Thanks Harold. If I get a set of new connectors, the cool thing to do=20 > would be to gold plate them. But I don't know how I would accomplish=20 > that. So if I can get replacements I'll just expect them to start=20 > crapping out in 10 years or so. Which is as good as a lifetime, I=20 > guess :) > > Best regards, Bob > > P.S. Gold plating varies in goodness, too. I know that ENIG is way too th= in. Eventually the base metal shoots some oxide through and pushes the leaf= and pin apart. > > ________________________________________ > From: piclist-bounces@mit.edu on behalf of=20 > Harold Hallikainen > Sent: Friday, November 15, 2019 3:29 PM > To: Microcontroller discussion list - Public. > Subject: Re: [EE] Not so good connectors, gone bad > > I believe the only solution to very low current connectors is gold on=20 > gold contacts. Attached are some notes from our engineering wiki on=20 > this. We've had problems with analog and digital low current signals=20 > going through connectors. We've gone to gold on gold. We also have a=20 > lithium cell in a holder, both nickle plated. The load is 10 uA. The=20 > connection would drop out now and then erasing private keys. The=20 > solution there was to solder in the battery. > > Low current switching and connectors are difficult. > > Harold > > > > > -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .