[sdiy] backplane connector recommendation?

[Jerry Gray-Eskue]

Thinking about it for a while I seem to recall a time when edge connectors 
came in about three flavors. Bare copper, silver color, I think this was 
just tinned copper and the ubber expensive gold finish. As I also seem to 
recall the copper connectors did tend to have problems with oxidation, the 
tinned connectors were a lot better but the gold connectors were (are) the 
best. I also recall the first thing to try when any of these were used in a 
device that was not working, was (is) to clean the edge fingers with an 
eraser (like on a no 2 pencil). I think that over time the gold fingers 
became the standard due to better performance and greatly reduced cost over 
the years. However I seem to recall that the tinned copper fingers were 
pretty reliable and easy to clean when they did act up.

----- Original Message ----- 
From: "Ullrich Peter" <Peter.Ullrich at kapsch.net>
To: "Andre Majorel" <aym-htnys at teaser.fr>; <synth-diy at dropmix.xs4all.nl>
Sent: Friday, February 11, 2011 2:18 AM
Subject: Re: [sdiy] backplane connector recommendation?


> Hi!
>
>>> I feel like these DIN connectors may be overkill for my needs.
>>
>>Overkill in what way ? DIN 41612 connectors with fewer contacts
>>exist. 64, 48, 32, 20 and 16.
>
>> 
>> http://www.harting-connectivity-networks.de/en/produkte/produktauswahl/din-41-612-steckverbinder
>
> These connectors are fine but not very cheap...
> A benefit is that there are many manufacturers for that standard 
> connectors.
>
>>With card edge connectors, you *must* have a PCB made.
>>Improvising something on the spot with strip board or vector
>>board is not an option. That's a big drawback in my eyes.
>
> That's not 100% correct as there are also prototype boards for card edge 
> connectors - we used
> It in our company before we switched to the DIN 41612 connectors.
>
> You can see some boards here:
> http://www.therpf.com/f9/hp-44-bus-type-computer-card-edge-connector-luke-esb-lightsaber-85377/
> http://www.answers.com/topic/edge-connector
> http://winonashops.com/WIRE_DCC.HTM
>
>
> But remember that these boards are not that common and higher priced.
> So if you want to build a complete system it ca happen that the more 
> expensive DIN connectors
> Together with the cheaper standard strip or vector boards are cheaper...
>
> Ciao
> Peter
>
>
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