RC2014 Mini expansion bus

[Ben Chong]

With the 5-slot backplane.

You can also do it with the 8 slot backplane.

How this works is that on the Mini, I mount a 40pin vertical female connector. On the backplane, I use a vertial male pin header, mounted under the board.

The space between the 2 boards when they come together is exactly 0.437". You can get spacer with that height from Jameco so that you can essentially bolt both boards together.

In the picture, you can see my hacked RAM card mounted on the backplane. The RAM card was hacked to run 16KB from 4000h to 7FFFh for development purposes.

The whole assembly feels very solid and robust.

[Spencer Owen]

Looks great :-)

My personal preference though is to have the Backplane 5 on the lower tier and the Mini connect down to it.  Works great either way.

Also, for those metrically inclined, it's 11mm between the two, and you can get 11mm m3 threaded hex nuts on eBay

Spencer

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[Ben Chong]

On Sunday, March 26, 2017 at 12:23:44 PM UTC-7, Spencer Owen wrote:

Looks great :-)

Thanks! 

My personal preference though is to have the Backplane 5 on the lower tier and the Mini connect down to it.  Works great either way.

It really depends on where you start from.

I started from the Mini, then added the female connector for the hacked RAM card which plugs into the Mini vertically. Plugging in the backplane vertically would have created a unwieldy tower, hence the horizontal expansion :)

[Spencer Owen]

Ah, ok, if you already had the header on the Mini then that makes sense.

Rather than plug the backplane in vertically I actually mean horizontally but with the backplane at the lower level. Like this;

Spencer 

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