Charlie E.
Guest
Fri Feb 05, 2010 4:40 pm
On Fri, 05 Feb 2010 03:41:01 -0500, Spehro Pefhany
<speffSNIP_at_interlogDOTyou.knowwhat> wrote:
Quote:
On Thu, 04 Feb 2010 20:25:24 -0800, the renowned Charlie E.
edmondson_at_ieee.org> wrote:
Mark,
Just curious, what spring loaded connector are you using to program
these boards? I am currently working on a board, and have found that
I need to connect to it to program it in situ. I am presently going
to just try having through hole pins that will provide a tight fit to
a .100 connector stuck through them, but wondered if there is a better
way?
Charlie
Microchip has a connector design that requires only pads and holes on
the PCB.
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en541943
I haven't tried it. Some other folks have come up with a row of pogo
pins that can be held against an unpopulated row of 1x6 0.1" header
holes (the header is probably the most popular connector scheme for
low volumes). Or a PCB fixture can be designed with pogo pins that
actually holds the PCB in alignment and avoids having the get your
hands near the programming cable.
Best regards,
Spehro Pefhany
Thanks, Sphero,
That looks like a good idea, and I may incorporate it in my next
design. I will stick with my present idea for now, as it allows me to
even shut the case and do testing and programming, if it works... ;-)
Charlie
John Walliker
Guest
Mon Feb 08, 2010 1:20 pm
On 4 Feb, 20:21, "markp" <map.nos...@f2s.com> wrote:
Quote:
obviously don't want solder paste on these pads, so is it my responsibility
Why are you worried about solder paste on the pads?
Spring loaded test pins make good contact with solder-coated pads.
So much so that one very reputable contract manufacturer I have used
specifically asked for paste to be present on test pads. They find
that the test pins dig into the solder and make more reliable contact
than with bare copper.
John
markp
Guest
Tue Feb 09, 2010 5:53 pm
"John Walliker" <jrwalliker_at_gmail.com> wrote in message
news:a92967d6-49d9-45d5-812d-bb73eae47b3f_at_36g2000yqu.googlegroups.com...
Quote:
On 4 Feb, 20:21, "markp" <map.nos...@f2s.com> wrote:
obviously don't want solder paste on these pads, so is it my
responsibility
Why are you worried about solder paste on the pads?
Spring loaded test pins make good contact with solder-coated pads.
So much so that one very reputable contract manufacturer I have used
specifically asked for paste to be present on test pads. They find
that the test pins dig into the solder and make more reliable contact
than with bare copper.
John
Interesting. I've thought about this and have now decided to keep the paste!
Thanks, it makes sense.
Mark.
