Server PSU for Antminer S1, step by step guide. - page 2.

goldar

newbie

Activity: 25

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Quote from: loshia on May 09, 2014, 12:54:08 PM

Quote from: GIXXER on May 09, 2014, 12:01:10 PM

Are the Server Psu's the best way to power the S1's? Im thinking about ordering 13 more because they're so cheap now.

Could you post a link where are you getting them in quantities?
10x

Try that big on-line auction house.
Lots of them listed.
Cannot find one, PM me I send you the link.

goldar

newbie

Activity: 25

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Quote from: GIXXER on May 09, 2014, 12:01:10 PM

Are the Server Psu's the best way to power the S1's? Im thinking about ordering 13 more because they're so cheap now.

They work great. run 2 s1 no problem.
Using 10 for 3 weeks straight only 1 failed couple days ago (my fault).
Cannot complain - 10 bucks each, cannot beat the price.

loshia

legendary

Activity: 1610

Merit: 1000

Quote from: GIXXER on May 09, 2014, 12:01:10 PM

Are the Server Psu's the best way to power the S1's? Im thinking about ordering 13 more because they're so cheap now.

Could you post a link where are you getting them in quantities?
10x

GIXXER

newbie

Activity: 10

Merit: 0

Are the Server Psu's the best way to power the S1's? Im thinking about ordering 13 more because they're so cheap now.

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

4 PCIe connectors = 12x GND wires and 12x 12V wires

bjalbert

full member

Activity: 166

Merit: 100

Can anyone tell me why there are so many wires coming off the positive and ground? I was expecting to see 4 on each for 4 pcie connections. What am I missing?

goldar

newbie

Activity: 25

Merit: 0

Quote from: tzortz on May 03, 2014, 11:44:05 AM

Hello there Goldar,

sure can be switched on and off with a mini switch.

Let me build one and revise the thread.

Keep following the thread.

It would be great.
It comes handy sometimes if you need to reset the miners instead of unplug/plug the power cord.
Please let us know.
Thank you.

tzortz

hero member

Activity: 728

Merit: 500

Every electric machine, like S1 is counted as a load witn resistance R.

To be more detailed, the R of S1 is variable and changes from 4 ohm, down to 0.3 ohm at full hashing overclocked.

Now the problem starts when an S1 starts hashing at different timing than others .

That would lead to different overall R, and create also different voltages to each S1.
Different voltages would mean to even higher than 20 or 30 Volts.

I dont believe an S1 can stand that high voltages.

allcoinminer

hero member

Activity: 784

Merit: 504

Never run like this.

Quote from: GordonBM on May 05, 2014, 03:12:54 AM

But, isn't that only 2 Ants?
Doesn't each blade use 12v?

OR

Maybe I could fix a voltage divider.

Vout = R2/R1+R2 * Vin

The psu should be giving off ~52V.
We want 12V. So we want a 100Ohm and a 30Ohm resistor.

Vin = 52
R1 = 100
R2 = 30

This should give 12volt on as out.

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

Quote from: GordonBM on May 06, 2014, 03:40:53 AM

So I did a little research and putting them in series is actually a horrible idea lol
Because if one fails, the others get more juice and will die.
If you put them in series, they must all have the equal amount of impedance and they do not have this. So they will die anyway.
Ah well, looks like I wasted my money.

figured. The machines are too complex to run in a series anyways for multiple issues. Its a complex device, not just an LED or basic circuit. Additionally the first unit would experience massive amperage through its wires and likelyt burn out

GordonBM

full member

Activity: 137

Merit: 100

So I did a little research and putting them in series is actually a horrible idea lol
Because if one fails, the others get more juice and will die.
If you put them in series, they must all have the equal amount of impedance and they do not have this. So they will die anyway.
Ah well, looks like I wasted my money.

GordonBM

full member

Activity: 137

Merit: 100

But, isn't that only 2 Ants?
Doesn't each blade use 12v?

OR

Maybe I could fix a voltage divider.

Vout = R2/R1+R2 * Vin

The psu should be giving off ~52V.
We want 12V. So we want a 100Ohm and a 30Ohm resistor.

Vin = 52
R1 = 100
R2 = 30

This should give 12volt on as out.

tzortz

hero member

Activity: 728

Merit: 500

Yes , exactly in series instead of parallel as in other cases.

GordonBM

full member

Activity: 137

Merit: 100

Quote from: tzortz on May 05, 2014, 01:35:29 AM

Right, there is not just the wattage that we should be looking for , but only the combination of the 12v supply with its amperage.

We dont need anything else than 12v.

Klondike, I wonder if you put 4x S1s connected in a row, would they work with 48V?

I believe they would.

What do you mean in a row?
In series?

That could work.
In series, the voltage divides, but the amperage stays the same.
In parallel, the amperage divides, but the voltage stays the same.

Maybe there's still hope for that esp120?

tzortz

hero member

Activity: 728

Merit: 500

Thanks for your kind words.

What kind of tampering? Except from the pins I mention in the guide?

bitcoin4eva

sr. member

Activity: 328

Merit: 250

Nice guide! I guess when tampering PSUs theres a danger of you messing up with the wirings and getting shot to hands with electricity when plugging it in?

tzortz

hero member

Activity: 728

Merit: 500

Right, there is not just the wattage that we should be looking for , but only the combination of the 12v supply with its amperage.

We dont need anything else than 12v.

Klondike, I wonder if you put 4x S1s connected in a row, would they work with 48V?

I believe they would.

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

Quote from: GordonBM on May 04, 2014, 05:56:33 PM

Quote from: tzortz on May 04, 2014, 04:19:46 PM

Quote from: GordonBM on May 04, 2014, 02:17:11 PM

Getting this psu this wednesday:
http://www.ebay.com/itm/HP-BLp-Bladeserver-ESP120-2950W-Netzteil-253232-001-226519-001-239161-B21-PSU-/310903465629?pt=PC_Netzteile&hash=item48634a669d&_uhb=1
3kW
Should be enough to power 7 S1's

No!

That psu is out for 51V and not 12V the S1s needs.

Gow did you come up with that?

Aw shit

I fcked up.
I must've read over the obvious line stating it is 50V output...damn..
Maybe I can convert it to 12V with a DC/DC Converter?

not easily or efficiently.

I almost snagged a similar 2500W supply at a recycling place then at the last second saw that 99% of its power came as 48V and the rest was like 0.5A of 5V and 0.02A of 12V

Abraxas601

newbie

Activity: 47

Merit: 0

Quote from: tzortz on May 04, 2014, 04:47:45 PM

Nice.

THere is no internal stock fan?
Or you use the extra ones for safety?

It has no fans so you need to add them or the supplies thermal protection will kick in and shutdown.

GordonBM

full member

Activity: 137

Merit: 100

Quote from: tzortz on May 04, 2014, 04:19:46 PM

Quote from: GordonBM on May 04, 2014, 02:17:11 PM

Getting this psu this wednesday:
http://www.ebay.com/itm/HP-BLp-Bladeserver-ESP120-2950W-Netzteil-253232-001-226519-001-239161-B21-PSU-/310903465629?pt=PC_Netzteile&hash=item48634a669d&_uhb=1
3kW
Should be enough to power 7 S1's

No!

That psu is out for 51V and not 12V the S1s needs.

Gow did you come up with that?

Aw shit

I fcked up.
I must've read over the obvious line stating it is 50V output...damn..
Maybe I can convert it to 12V with a DC/DC Converter?

Topic: Server PSU for Antminer S1, step by step guide. - page 2. (Read 40396 times)