[Coco] Coco Cartridge Prototyping Pak PCB

Zippster zippster278 at gmail.com
Thu Oct 9 08:59:28 EDT 2014

Hi Kip,

That does look a lot better.  My comments are just about the layout as
I haven’t studied the schematic yet.

When working with the board layout in Eagle, you can “Smash” a part,
separating the silkscreen layers from the rest of the part.
Then you’ll be able to remove items like the JP1, PAD1, etc.
This will also let you move silkscreen part names and values
around, rotate, resize etc. to get a cleaner layout.

I would move the logic chips away from the edge a bit as someone else
mentioned.  Also reposition the vias around the labeled line header
so that they don’t mess up the silkscreen.

It’s coming together nicely.

- Ed

On Oct 9, 2014, at 12:01 AM, Kip Koon <computerdoc at sc.rr.com> wrote:

> Hi Guys!
> Here is the second version of the Coco Cartridge Prototyping Pak with all
> your suggestions.  How did I do Ed?  Not only have I included the links to
> the renderings from OSHPark, but I have also included the Schematic and PCB
> layout in PDF form since so many people are expressing an interest in this
> project and have made suggestions.
> The following links are the top and bottom renderings of the PCB from
> OSHPark.
> https://www.dropbox.com/s/yy17jwamkejx94s/Coco%20Cartridge%20Prototyping%20P
> ak%20-%20Top.png?dl=0
> https://www.dropbox.com/s/euo6vq5ukkr8gvu/Coco%20Cartridge%20Prototyping%20P
> ak%20-%20Bottom.png?dl=0
> Here are the links to the schematics and the PCB layout.  The first
> schematic has all the decode logic.  All the second schematic has are the
> holes.  The third link of course is the PCB layout from Eagle Pro. V6.4.0.
> https://www.dropbox.com/s/amvqf8nf5xfvznl/Coco%20Cartridge%20Prototyping%20P
> ak%20sch%201.pdf?dl=0
> https://www.dropbox.com/s/pu3o328c8aolm9d/Coco%20Cartridge%20Prototyping%20P
> ak%20sch%202.pdf?dl=0
> https://www.dropbox.com/s/0736lzhlvs7w1of/Coco%20Cartridge%20Prototyping%20P
> ak%20brd.pdf?dl=0
> Thank you Ed for offering to help.  It was late when I got back on, so I
> went ahead and tried my hand at some clean up.  
> If I missed someone's suggestion.  It was not intentional.  Please continue
> to inspect my work and let me know what you think?  I appreciate all your
> suggestions.  It helps me to make a better PCB.  Thanks a bunch!  Have Fun
> Guys!
> Kip Koon
> computerdoc at sc.rr.com
> http://www.cocopedia.com/wiki/index.php/Kip_Koon
> http://computerpcdoc.com/
> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of rcrislip
> Sent: Wednesday, October 08, 2014 11:49 PM
> To: coco at maltedmedia.com
> Subject: Re: [Coco] Coco Cartridge Prototyping Pak PCB
> On Wed, 08 Oct 2014 20:38:55 -0500
> Brian Goers <briang0671 at sbcglobal.net> wrote:
>> On 10/8/2014 5:20 PM, Kip Koon wrote:
>>> Hi Everybody!
>>> The Coco Cartridge Prototyping Pak PCB is designed and ready for 
>>> scrutinizing.  I'd like to get a few interested people to examine 
>>> the schematic and make sure I have done my homework correctly.
>> On the top drawing. I see an outline around two holes, are the two 
>> holes connected.
>>     I would like to have at least 3 holes connected.
>> The outline pattern changes to the right of the decoding section, it's 
>> one row down.
>> The outlines do not line up from the left to right across the board.
>> Can numbers be put on the board to help layout/ locate positions?
>> How big is this board?
>> Kip Koon
> OK <ignorance switch on>
> I am not sure what the silk screening critiques are about. IS that referring
> to the printing over some of the holes? To my untrained eyes, it looks good.
> <ignorance switch off>
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