TI-H: Re: SPinTerface: why 10, not 8 pins


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TI-H: Re: SPinTerface: why 10, not 8 pins





>From: Robinson <robinson@nceye.net>
>To: "'ti-hardware@lists.ticalc.org'" <ti-hardware@lists.ticalc.org>
>Subject: TI-H: spinterface
>Date: Fri, 15 Aug 1997 21:17:33 -0400
>
>This question is to Richard.  Isn't it possible to build the 
SpinTerface =
>with only 7 pins?  I notice that the 5v regulator and the ground wires 
=
>are just doubled.  Is there any reason for this?
>
I only did it because i had an easier time trying to find 10-pin headers 
than 8-pin. The original design was an 8-pin with one to keep it from 
being plugged in wrong. I tried 8-pin DIP sockets, but the pins always 
came out cause they are designed to be soldered. They would sometimes 
push right through. When I found about 6 10-pin headers off of serial 
cables, I used those, but my first header was a standard header with a 
10-wire ribbon cable. I put the filled in pin that connects to nothing 
where it was because I actualy tested different locations and it was the 
best location to prevent accidental insertion (one pin over (like if the 
filled hole was on the end) and the cart's link connections could hit a 
power supply. I made the design the way it is because it is safest for 
the carts. I realize that an 8-pin connector would be possible, but I 
couldn't find any smaller than 10-pins. As for the 5v+ and Ground pins 
being doubled, I did it because they only cary power and I had two extra 
pins. I could just have easily used 8-pin headers, IF I could have found 
one.

Hope that explains things!




Richard Piotter



e-mail: richfiles@hotmail.com



home page: <A 
HREF="http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html">The 
Richfiles</A>

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