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Re: [N8VEM-S100:366] What DIP sockets to use in building boards
Now I am wondering if my desire to be conservative and socket everything,
coupled with being new to the socket sourcing business has combined to
contribute to the general flaky behavior some (many) of my boards have
exhibited.
During debugging I have experienced a situation where the pin on the other
side of the board doesn't have continuity with the pin of the chip in the socket,
and I assumed it was iffy soldering, but it could have been lousy sockets.
I guess I will try Jack's suggestion (Phoenix Ent) in hopes that these problems
will go away. If the sockets are the source of my troubles, the money saved
isn't worth the trouble.
Douglas
On Jul 29, 2011, at 11:04 PM, Nick Papadonis wrote:
> I ordered some inexpensive non-machined sockets from China on Ebay.
> This occurred before I knew anything about socket quality. They were
> pretty much junk and their price said it all. The IC barely held into
> the socket. They can't be used for socket in socket adapters because
> the pins pop out. I prefer the machined sockets even though they are
> more expensive. They are better constructed.
>
> On Jul 29, 2:46 pm, Douglas Goodall <douglas...@mac.com> wrote:
>> Thanks for the link Jack,
>>
>> I have used both the machined sockets and the double-wipe sockets.
>>
>> There is a case for both kinds on the basis of usage.
>>
>> ZIF sockets (because of their weird pins) do not insert into machined
>> sockets. Even the double wipe sockets barely work for that.
>>
>> I have had the metal inserts push out even under mild heat. The
>> machined sockets never do that.
>>
>> It can be trying to insert the larger chips into the machined sockets,
>> but once they are in, I think they are better.
>>
>> There is no doubt that gold pins have less contact oxidation/resistance,
>> and solder flows onto them well.
>>
>> I did recently deal with some machined sockets that didn't want to
>> accept the solder, even though I use a kind with some flux. So if
>> you are going to buy the machined ones, use a reliable source.
>>
>> Now that I am low on sockets, I am thinking about buying mainly
>> the gold machined ones, except for programmable chips, and then
>> a good reliable source for those.
>>
>> Just some thoughts about your questions...
>>
>> Douglas
>>
>> On Jul 29, 2011, at 10:45 AM, Jack Rubin wrote:
>>
>>
>>
>>
>>
>>> There are those who claim that only gold-plated machined pin sockets will do,
>>> but a more realistic approach might include the high-quality double-wipe sockets
>>> available from Phoenix Enterprises -http://www.phoenixent.com/- minimum order
>>> is $50 dollars but that's not to hard to reach if you're trying to keep up with
>>> the N8VEM circuit board output! (Plus they have tools, etc.) They'll also sell
>>> you machined-pin sockets if you wish - you'll reach the order minimum in about
>>> 1/3 the time!
>>
>>> Jack
>>
>>>> From: Lawrence Lewis <lawr...@alternativeenergynow.org>
>>>> To: n8vem...@googlegroups.com
>>>> Cc: Lawrence Lewis <lawr...@alternativeenergynow.org>
>>>> Sent: Fri, July 29, 2011 11:55:17 AM
>>>> Subject: [N8VEM-S100:363] What DIP sockets to use in building boards
>>
>>>> Hi:
>>
>>>> I have heard cheap dip sockets can be source of problems.
>>
>>>> What dip sockets are recommend by the group?
>>
>>>> Gold or tin plating? Machine tooled seem expensive?
>>
>>>> Thanks,
>>
>>>> Lawrence
>>
>>>> From:n8...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf
>>
>>>> Of Jack Rubin
>>>> Sent: Friday, July 29, 2011 4:59 AM
>>>> To: n8vem...@googlegroups.com
>>>> Subject: RE: [N8VEM-S100:362] Some good deals on EPROMS on eBay
>>
>>>> Thank you!
>>
>>>> From:n8...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf
>>
>>>> Of Douglas Goodall
>>>> Sent: Thursday, July 28, 2011 7:53 PM
>>>> To: n8...@googlegroups.com; n8vem...@googlegroups.com
>>>> Subject: [N8VEM-S100:359] Some good deals on EPROMS on eBay
>>
>>>> Friends,
>>
>>>> I bought 10 EPROMS for $4.40 each today. That is substantially less than I have
>>
>>>> been paying to the distributors.
>>
>>>> The deal I found was also a few hundred miles away so shipping will be fast. I
>>>> like being able to keep a few different PROM
>>>> versions around without having to erase and re-burn them constantly. Ten is
>>>> enough to keep some low-level diagnostic
>>>> PROMs around as well as several different builds/baud rates. FYI :-)
>>
>>>> Jameco...
>>
>>>> ---
>>
>>>> //* * \\
>>>> (/(_•_)\)
>>>> _/''*''\_
>>>> (/_)^(_\)
>>
>>>> Douglas Goodall
>>>> douglas...@me.com
>>>> http://www.goodall.com
>>>> http://www.linkedin.com/in/douglasgoodall
>>
>>>> "Did Goloka think the Ulus
>>>> were too ugly to save?"
>>
>>> ________________________________
>>
>>>> No virus found in this message.
>>>> Checked by AVG -www.avg.com
>>>> Version: 10.0.1390 / Virus Database: 1518/3793 - Release Date: 07/28/11
>>
>> ---
>>
>> //* * \\
>> (/(_•_)\)
>> _/''*''\_
>> (/_)^(_\)
>>
>> Douglas Goodall
>> douglas_good...@me.comhttp://www.goodall.comhttp://www.linkedin.com/in/douglasgoodall
>>
>> "Did Goloka think the Ulus
>> were too ugly to save?"
---
//* * \\
(/(_•_)\)
_/''*''\_
(/_)^(_\)
Douglas Goodall
douglas...@me.com
http://www.goodall.com
http://www.linkedin.com/in/douglasgoodall
"Did Goloka think the Ulus
were too ugly to save?"