Octoprint setup with Raspberry Pi

Is something like this small enough?
http://www.ebay.co.uk/itm/275W-for1U...-/111094487537
Attachment 448

I suppose you could take a cheap car lighter socket to USB adapter and wire it in...

Or wire in a normal USB adapter:) Im considering it - just need to figure out a safe solution:)

Mix Output Voltage: +5V 13A, -5V 0.5A, +12V1 7A, +12V2 7A, -12V 0.8A, +3.3V 13A, +5V-SB 2.5A

Yes, that would do.

Our printer specs (according to my measurements):
- Each motor needs 1.2A , total 4.8A.
- Bed heating is 3 ohm = 4A
- Nozzle is 5 ohm = 2.4A
- I don't know how much is the PCB and all the fans, but it should be less than 2A.
Total: 13.2A

So with that ATX would be almost at its current limit because it only outputs 14A divided 7A+7A on each 12V wire.

It would be better to have a higher margin.

For example this one: http://www.ebay.co.uk/itm/NEW-QUIET-...item19cb6c1033
The 12V output can handle an impressive 37A.
And it has 5V output for more than 30 RaspberryPis !



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Quote:

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Originally Posted by clayton

I suppose you could take a cheap car lighter socket to USB adapter and wire it in...

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That is in fact a good idea, but it needs to do at least 1A.

I'm thinking something like this, as it already steps down from 12v to 5v:

http://m.ebay.com/itm/261264313241?_mwBanner=1

Quote:

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Originally Posted by clayton

Hi,

It's this case:

http://www.thingiverse.com/thing:604915

It's a sleeve so you slide the Pi in - I'm going to try a different colour for the end cap.

I tried another one as well and the same thing happened to me - broke the uprights in a snap together model

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Unfortunately most of the bottom slats broke on mine with hardly any pressure on them, they were like crisps! (potato chips for our American friends :)) and one of the posts at the top broke off as well! Still at the moment it's better than my earlier one so it stays. Might give the solid version a go and see how that works.

What sort of power source do racks (web servers, rendering farms) use? embeded in the metal frames or in the computer board?

Quote:

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Originally Posted by bolsoncerrado

What sort of power source do racks (web servers, rendering farms) use? embeded in the metal frames or in the computer board?

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The racks don't have power supply, the computer or other device inserted in the rack, have their specific power supply.
There are servers that have multiple power supplies for redundancy and can be replaced with the computer always on.
It's not necessary to go that far, any ATX for a regular computer lasts many years always on.

Yeah but i was mentioning them given their "horizontal configuration"... ATX PC powersupplies tend to be bulky "vertically speaking"....

Quote:

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Originally Posted by bolsoncerrado

Yeah but i was mentioning them given their "horizontal configuration"... ATX PC powersupplies tend to be bulky "vertically speaking"....

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Its not easy to find a white label ATX with a 1U or 2U dimensions, they are normally designed specifically for the device and owned by the brand.
Thats why the only ones I found for sale were HP, but the ones with higher Amp have ridiculous costs ($100).
The hacking solution of adding a $1 step down transformer for the Pi is perfect.