[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [N8VEM-S100:7728] TO-3 footprint needed



Yes, John, the 386 board files you linked me too were just the ticket.  I did not know I could pull footprints from board files. I was able to get both the TO-3 and the S-100 footprints. Also, I found mechanicals for the TO-3 in an old data book and the locations of the pins in your footprint are off enough to cause the problem you describe. I have tweaked the locations to match and confirmed with empirical measurements on a real LM323K. Is there a way to upload my TO-3 somewhere so everyone can use it?

Bob Bell



Sent from somewhere in the Galaxy...



-------- Original message --------
From: John Monahan <mo...@vitasoft.org>
Date: 2015/10/03 2:26 PM (GMT-05:00)
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:7728] TO-3 footprint needed


Yes I have used the EZSBC Bob, (see http://s100computers.com/My%20System%20Pages/MSDOS%20Board/MSDOS%20Board.htm ).  I have found them excellent though sometimes you have to tweak the onboard pot to get 5V’s under load.  Intrinsically I just don’t like adjustment pots.   Note the footprint is slightly off from the KiCAD TO-3. I raise  the unit with a washer from the board and bend the pins slightly.  Take care they are delicate – boke one!

 

As Dave suggested I think the above page .zip file also contains the correct S100 bus connector/footprint.

Frankly my KiCAD folders are a mess right now. I have been holding out for the new version of KiCAD to be released which has a different library interface and kind of get everything in one spot at that time.  That said.  if you don’t get the correct footprint for the S100 connector from the above page let me know.

 

Good luck John

 

 

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Bob Bell
Sent: Saturday, October 3, 2015 10:48 AM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:7727] TO-3 footprint needed

 

Thanks again, John.

It was suggested by others that I pull the TO-3 footprint from another project, like those on the N8VEM-S100 web site.  I’ll look into that, especially the link you provided below.  I want to do exactly what I have seen you do, that is include the Pololu regulator stacked on top of a TO-3 regulator.  Further, I found another 5V switching regulator from EZSBC called the PSU5, and LM323K replacement.  (http://www.ezsbc.com/index.php/featured-products-list-home-page/psu5.html#.VgK07Jce3s5).  This gives me three regulator options: Standard LM323K, EZSBC PSU5 (fits in the TO-3 space, but without a heatsink) and the Pololu part.  I am looking for the TO-3 footprint only because I don’t have good mechanicals on the TO-3 part in order to make my own.

 

BTW, the link to the S-100 appears to only have 62 pins, and they are on 0.1” centers, not 0.125”.

 

Bob Bell

 

 

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of John Monahan
Sent: Saturday, October 03, 2015 12:02 PM
To: n8vem...@googlegroups.com; kicad...@yahoogroups.com
Subject: RE: [N8VEM-S100:7726] TO-3 footprint needed

 

Bob go to the bottom of this page:-

http://s100computers.com/My%20System%20Pages/80386%20Board/80386%20CPU%20Board.htm

 

The KICAD .zip file contains a footprint for a LM323  (a TO-3 5V regulator).  These days I overlay a TO-3 on top of a Pololu regulator. No extra space, more options. 

I sent you a link yesterday for the S100 connector.

John

 

 

 

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Bob Bell
Sent: Saturday, October 3, 2015 4:10 AM
To: kicad...@yahoogroups.com; n8vem...@googlegroups.com
Subject: [N8VEM-S100:7723] TO-3 footprint needed

 

Good morning group,

 

I have been searching now for ½ hour and cannot find a footprint in the KiCAD v4 library for a TO-3 case semiconductor (typical LM323K).

Is it actually there, and I keep missing it?  If so, please point it out to me.

If it isn’t there, do you have a footprint for TO-3 that you would be willing to share?

 

Also, a few days ago I posted a message in regards to an S-100 edge fingers footprint (not the edge connector, but the component that creates the edge fingers on the board).

I got one response, but it didn’t work.  Is there anyone else with a confirmed functional S-100 edge fingers footprint they would be willing to share?

 

Thanks for your help!

 

Bob Bell

 

--
You received this message because you are subscribed to the Google Groups "N8VEM-S100" group.
To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s100+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "N8VEM-S100" group.
To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s100+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "N8VEM-S100" group.
To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s100+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "N8VEM-S100" group.
To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s100+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.