On eBay: Clone Micro-ATX Backplates

General discussions related to the Altair 8800 Clone

On eBay: Clone Micro-ATX Backplates

Postby steve_a » February 28th, 2019, 2:31 am

Hope this isn't too solicit...

Here's the link:
https://www.ebay.com/itm/352602118348?ul_noapp=true

There was interest in having me sell these directly, but having the eBay storefront proved too convenient to pass up.

I'm asking $110 each + shipping. This covers eBay's markup and the cost of manufacture.

UPDATE 7/24/2019
: the entire first batch is gone. I need to get with my fab shop and order some more, which I'll be doing before too long.

I wrote a lot of information in the eBay listing description, but I plan to expand on that information here as things pop up.

Aside from requirement of 20mm motherboard standoffs, a way to power the clone PCB (I used the 5V to 12V modification and the ATX standby Voltage), and the fact that its a really tight fit, it works pretty well.
Last edited by steve_a on July 24th, 2019, 9:27 pm, edited 4 times in total.
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Re: On eBay: Clone Micro-ATX Backplates

Postby steve_a » February 28th, 2019, 2:42 am

For the power requirements, here's what I did.

To run the board off 5V:
AltairClone wrote:Tack on a jumper wire where shown by the yellow line to configure the Altair Clone PCB to run from 5v instead of 12v.

Mike

Image


And I used the 5V standby voltage off the ATX. It is hot all the time, even if the rest of the ATX supply is off, so the clone can run independent of the micro-ATX motherboard. The +5V standby is normally rated for 2-3A and the clone only draws 40mA, so that should be fine. +5SB (and COM) in this pinout:

Image

Works like a champ.
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Re: On eBay: Clone Micro-ATX Backplates

Postby steve_a » April 23rd, 2019, 11:47 pm

When I designed the plate I had provisioned a 92mm Asetek 545LC all-in-one liquid cooler to fit in one of the fan cutouts.

In December 2018, Asetek discontinued the 545LC. I was not happy. I purchased a Hardware Labs Black Ice Nemesis 92mm radiator and it does "fit", but mounting a pump and reservoir really started to get cramped.

UPDATE 7/24/19: Asetek has released the followup to the 545LC, the 645LT. It is the same size as the 545LC and fits on the backplate with a 2nd fan next to it with no issue.

So there are (at least) two options for liquid cooling with the backplate. Hardware Labs Black Ice Nemesis or an Asetek 645LT or possibly (UNTESTED) Alphacool NexXxoS XT45.
Last edited by steve_a on July 24th, 2019, 9:26 pm, edited 2 times in total.
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Re: On eBay: Clone Micro-ATX Backplates

Postby TomXP411 » June 27th, 2019, 3:25 pm

Do you still have any of the back plates? I just ordered a Mini ITX motherboard, and I'm debating whether to install it in my Altair Clone or to order a small form factor case for it.

If that's not a viable option, I may find a 19" rack mount case and Frankenstein something together.
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Re: On eBay: Clone Micro-ATX Backplates

Postby steve_a » July 24th, 2019, 9:15 pm

TomXP411 wrote:Do you still have any of the back plates? I just ordered a Mini ITX motherboard, and I'm debating whether to install it in my Altair Clone or to order a small form factor case for it.

If that's not a viable option, I may find a 19" rack mount case and Frankenstein something together.


At the moment, no. I have to order a few more next chance I get and post them back on eBay (and sell them directly this time, eBay ate into my $2.00 profit on each one :-D)
I'll let everyone know when I acquire some more.

(edited): It looks like mini-ITX shares mounting holes with the ATX/Micro-ATX. So that should work. The PCI slots will be empty, but those are easily covered.
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Re: On eBay: Clone Micro-ATX Backplates

Postby TomXP411 » July 29th, 2019, 12:41 pm

Thanks for the update.

I ended up buying a SFF PC case and moving the HDD out of my NUC, along with a new SSD. So I'll eventually find a way to mount the NUC inside the Altair Clone, but I've got a ton of other projects on the burner, first.

What I'd really like to find... I'm not sure exists. The developer boards (like the Pi) all have ports on too many sides to be easily usable in a situation like the Altair Clone, but small form factor computers like the NUC don't have a lot of mounting options.

I could use my nibbler to make a hole the size of the NUC's rear panel, but I can't access the power button if I mount it inside the case.

What I'd really like to find is a mini PC about the same size as the NUC, but designed to be installed inside of a larger enclosure - basically a PC designed for embedding. I almost bought an Atomic Pi for this use, but it's just too oddball to make me comfortable.
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Re: On eBay: Clone Micro-ATX Backplates

Postby managed_mischief » August 31st, 2019, 6:08 pm

hey there, just wanted to express interest in a back plate from the next batch and say thanks for going to all the trouble
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