[NTLK] NewtonTalk Digest, Vol 18, Issue 9

Matthias Melcher mm at matthiasm.com
Wed Jun 10 06:26:37 EDT 2015


Crimpable contacts can usually be ordered individually:

http://de.rs-online.com/web/c/steckverbinder/leiterplattensteckverbinder/leiterplatten-steckverbinder-kontakte/?searchTerm=kontakte&sort-by=P_breakPrice1&sort-order=asc&pn=1

High-res 3D printers with the SLA method are relatively common for hobbyists already and should be up for the job.


On Wed Jun 10 2015 02:06:56, Jake Bordens wrote:
> 
> You can find the engineering drawings here: 
> 	http://mirrors.unna.org/staff.dstc.edu.au/david-arnold/newton/dev/interconnect-drawings/
> 
> I have two of them somewhere in my archives.  Currently lost, but they'll probably turn up again someday.
> 
> I think its going to be hard to modify an existing connector.  You might be able to make a PCB of the right thickness and wedge it in such that it makes contact with the connector, but  I think there's high risk of screwing something up, and putting too much stress on the connector.
> 
> 
> I think Matthias has an interesting idea.  I had an old 30-pin iPod dock connector that had removable spring contacts.  See this picture:
> 
> http://assets.head-fi.org/4/4b/4b599369_httpimg830.imageshack.usimg8302410snapshot201102101.jpg
> 
> Someone could in theory engineer a housing that takes the contacts from a connector like this.  It would need to be printed on a very high resolution 3D printer.  Doable, but someone would have to care enough to do it right.  Odds are it would take a few iterations before you had a good connector.
> 
> 
> On 6/9/15, 7:41 PM, "Michael Sheflin" <sheflinm at gmail.com> wrote:
> 
>> Well my first thought was maybe Mouser (or whoever) has something close
>> enough that it could be bent or modified.  There's an article noting that
>> it was made by JAE and is 26-pins.  I measured mine and it's about 15mm
>> [about 0.58mm pitch] from pin-to-pin and 17mm at the longest (though it
>> tapers at the bottom).  Mouser has a bunch of things that are likely
>> modifiable.  Most of the really close ones are over $10 a piece, which is a
>> bit much for experimenting.  But I may get a couple of the cheaper options
>> and try my luck and then - over a long period of time - work my way through
>> the others.
>> 
>> 
>>> 
>>> Yes, they are purely passive. The problem is that the plugs are no longer
>>> available and will not be made, even in larger numbers. I did manage to
>>> have 350 *internal* connectors made (minimum order :-/ ), but the external
>>> connector is no longer available (maybe they junked the dies).
>>> 
>>> Maybe with a resin based 3D printer it would be possible to adapt some
>>> standard copper contacts into a new connector? This could even integrate
>>> the Sub-D nicely.
>>> 
>>> ------------------------------
>>> 
>> 
>> ----------------------------------------------------------------------
>> 
>> http://newtontalk.net/





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