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Subject: RE: [Homebrew_PCBs] Re: card edge mounting

From: David Bobb <dave.bobb@...>
Date: 2012-07-17

I'm not doing top and bottom connectors and I'm not doing hot swappable.
All the fingers are on the top, because the microcontroller is on the top.
Power management is on the bottom of the card to make it smaller. Power
input is on the bottom but not lined up with the data pins.

I was simplying wondering if there was a connector that you can slide the
card into lengthwise. I know I saw something similar to what I'm looking
for when I was an ET on subs in the US Navy. That's where I got the idea
from. I just can't find it or remember what I saw it on.
On Jul 16, 2012 5:45 PM, "Tony Smith" <ajsmith1968@...> wrote:

> ∗∗
>
>
> > > > not quite what you're looking for, but floppy drive cables provide a
> > > cheap & easy way to get from board traces to ribbon cable. can also
> > > work as an sd card socket
> > > >
> > >
> > > I think the OP is asking about Card Guides. These are slotted guides
> > > that are mounted to a backplane or the rear of a card cage that guides
> > > a PCB card properly into the receptacle. Search www.mouser.com,
> > > www.digikey.com, www.jameco.com, etc. for "card guide" and you should
> > > turn up something useable.
> > >
> > > Cheers,
> > > Dave M
> > >
> > > No, I do not mean card guides as in the simple pieces of plastic that
> > > guide a card in to it's connector.
>
> As always when trying to do something unusual, the question to ask is why
> no-one else is doing that (and it's not an easy question to ask). Unusual
> tends to mean 'bad idea' or 'we tried that and it was crap'.
>
> I've never see anyone do top & bottom connectors, just thinking about it
> it's likely to be a PITA. From the comments they do exist, but more trouble
> then they're worth. If it's from a lack of space you can get high density
> connectors to go on the back of the card.
>
> Hot swap is easier to do, look at how USB has the data pins shorter than
> the
> power pins. Some backplane connectors do that to.
>
> Tony
>
>
>


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