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[cscape]

No, 0.25A is not right.

I just measured it on the S-HASH board by putting a 1Ω resistor on the output of the 1.8V regulator. Voltage drop was 95mV, so current is 95mA for 16 chips, or about 6mA per chip, which sounds a lot better.

[ssi]

No, 0.25A is not right.

I just measured it on the S-HASH board by putting a 1Ω resistor on the output of the 1.8V regulator. Voltage drop was 95mV, so current is 95mA for 16 chips, or about 6mA per chip, which sounds a lot better.

awesome, thanks

[KNK]

IOVDD current consumption should be around 0.25A at 1.8V per chip.
(from what I can tell via google translate - source: https://bitcointalk.org/index.php?topic=242745.msg2964335#msg2964335)

The link posted shows the consumption of a chip with outputs shorted to ground, so it is the maximum a chip will consume from IOVDD. Normally it should be 10-15 times less. Just to be safe i would count 20-30mA per chip and half of that for over 100 chips

[vs3]

IOVDD current consumption should be around 0.25A at 1.8V per chip.
(from what I can tell via google translate - source: https://bitcointalk.org/index.php?topic=242745.msg2964335#msg2964335)

The link posted shows the consumption of a chip with outputs shorted to ground, so it is the maximum a chip will consume from IOVDD. Normally it should be 10-15 times less. Just to be safe i would count 20-30mA per chip and half of that for over 100 chips

Thanks for the clarification and thanks to cscape for the actual measurement!

The most important piece is that I can switch now my design to use a tiny and cheap 150mA LDO

[intron]

IOVDD current consumption should be around 0.25A at 1.8V per chip.
(from what I can tell via google translate - source: https://bitcointalk.org/index.php?topic=242745.msg2964335#msg2964335)

The link posted shows the consumption of a chip with outputs shorted to ground, so it is the maximum a chip will consume from IOVDD. Normally it should be 10-15 times less. Just to be safe i would count 20-30mA per chip and half of that for over 100 chips

Thanks for the clarification and thanks to cscape for the actual measurement!

The most important piece is that I can switch now my design to use a tiny and cheap 150mA LDO

On S-HASH we use this one: LM1117DT-1.8
In rather clunky TO-252 casing to be on the
safe side regarding heat dissipation.

But there are even less expensive alternatives.

intron

[Tyger]

can anyone with chips confirm this?

[Gomeler]

No, 0.25A is not right.

I just measured it on the S-HASH board by putting a 1Ω resistor on the output of the 1.8V regulator. Voltage drop was 95mV, so current is 95mA for 16 chips, or about 6mA per chip, which sounds a lot better.

That is a relief, thanks!

[Tyger]

thank you for clearing that up

[cscape]

Here's a couple of photo's I took while assembling an S-HASH board.

[vulgartrendkill]

Here's a couple of photo's I took while assembling an S-HASH board.

You do that by hand???

how long does it take? flippin` ek. I could not do that

[LaserHorse]

Here's a couple of photo's I took while assembling an S-HASH board.

beautiful pics! 

aah, the tiny zen of electronics assembly ...

[cscape]

You do that by hand???
how long does it take? flippin` ek. I could not do that

Yes, but only for small series, like one or two prototypes. This is a board for Foofighter to help fit a case for it.

I also made these boards (in Dave's first post) in a similar way.

[vulgartrendkill]

You do that by hand???
how long does it take? flippin` ek. I could not do that

Yes, but only for small series, like one or two prototypes. This is a board for Foofighter to help fit a case for it.

I also made these boards (in Dave's first post) in a similar way.

mega props dude. seriously

[Syke]

Here's a couple of photo's I took while assembling an S-HASH board.

Perler Beads for Adults!

[spiccioli]

Here's a couple of photo's I took while assembling an S-HASH board.

Insanely small parts... I can barely see them when looking through a magnifying lens...   

spiccioli

[Andreoid]

Designed to have a heatsink mounted to the back with airflow; I expect this sucker to require some cooling!  

If you want to overclock them and expect to much heat, please feel welcome to contact us (anfi-tec) for some watercoolers.
Furthermore for a better packing density.

That might be a good option... I'd need a waterblock that's about 100x30mm.

• what do you think will the 12 chips produce in heat/Power consumption in idle?
• and the same with overclocking?
• how many of these miniboards you plan to put on a backplane/rack?
• what distance is planned for the pci-slots (with watercooling you can pack them much closer together than with aircooling)
• are you planing to sell these miniboards?
• cooling from the backside of the board like the avalonchips?

i am sure that we can't use here one waterblock for two boards like we did with bitburner XX waterblock

12 chips at full rate will produce around 30W.  The 40A regulator probably another 5W.
The bottom of the module has the soldermask masked back to show bare plated copper for good heat transfer.  Yes, cooling from the backside of the board.

Heatsink dimension should be 100x35mm.  I'll get you the mounting hole pattern this evening; they're 2mm mounting holes.

For the backplanes I'm designing now (for aircooling), the slots are 36mm apart.  Here's a render of a 480GH miner on a 16 way backplane:

http://www.prototechnical.com/~imcmahon/480GH_render1.png

Could you change your mountingholes to 3.18 mm? I have never seen any smaller mountingholes than M2,5 on electric equipment.

We could offer you an individual water cooler with a size of 100x30x15mm (2 x 1/8 "fittings) ~ 40 € each (> 100)
Are you planning to design another backplane for water cooler?
If yes, i have some suggestions: Try to put more boards on one cooler. Use the front and the backside of the watercooler.

2 short examples:
If you use front and back of the watercooler, the cost per board would only be --> 20 €
If you manage to put 4 boards on a 100x70x15 (2x G1/4" fittings) watercooler ~ 50 € (> 100pieces)
the cost per board would decrease even further. --> 12,50€ per Board.
Another idea is to use multiconnectors from watercooling for grafic-cards.
But i think the small extra-chip with the ?40A regulator? will prevent all this.


example:
2xBitburner XX with one watercooler http://www.anfi-tec.de/forenbilder/13.07.11%20Bitburner/Anfi-tec%20Bitburner%20XX%201.JPG
finished blocks http://www.anfi-tec.de/forenbilder/C006/13.08.30%20Bitburner%20Waterblocks.JPG
And of course with less coolers you have to do less tubing.

@cscape
for you the same: If you want to overclock them and expect to much heat, please feel welcome to contact us (anfi-tec) for some watercoolers.

Regards Andre

[gingernuts]

Here's a couple of photo's I took while assembling an S-HASH board.

That is beautiful work

I can't help wondering though, has anyone had success with fewer, larger caps? From what I can see, all the grounds are on the centre pad, all the pins on 3-sides are commoned internally to VDD, then split out to dozens of tiny caps, via'ed down to the ground plane. Does this have some inductance or ESR benefit, are the caps just cheaper, or is this just a design that works, so why mess with it?

[cscape]

I can't help wondering though, has anyone had success with fewer, larger caps? From what I can see, all the grounds are on the centre pad, all the pins on 3-sides are commoned internally to VDD, then split out to dozens of tiny caps, via'ed down to the ground plane. Does this have some inductance or ESR benefit, are the caps just cheaper, or is this just a design that works, so why mess with it?

More little caps in parallel have lower inductance than a few big ones. Maybe 15 caps is overkill, but it works, so why mess with it ?

I could try mounting fewer, but the problem is that if it doesn't work properly, I'd have to hand solder the rest, which is a terrible job.

[ssi]

Could you change your mountingholes to 3.18 mm? I have never seen any smaller mountingholes than M2,5 on electric equipment.

We could offer you an individual water cooler with a size of 100x30x15mm (2 x 1/8 "fittings) ~ 40 € each (> 100)
Are you planning to design another backplane for water cooler?
If yes, i have some suggestions: Try to put more boards on one cooler. Use the front and the backside of the watercooler.

2 short examples:
If you use front and back of the watercooler, the cost per board would only be --> 20 €
If you manage to put 4 boards on a 100x70x15 (2x G1/4" fittings) watercooler ~ 50 € (> 100pieces)
the cost per board would decrease even further. --> 12,50€ per Board.
Another idea is to use multiconnectors from watercooling for grafic-cards.
But i think the small extra-chip with the ?40A regulator? will prevent all this.


example:
2xBitburner XX with one watercooler http://www.anfi-tec.de/forenbilder/13.07.11%20Bitburner/Anfi-tec%20Bitburner%20XX%201.JPG
finished blocks http://www.anfi-tec.de/forenbilder/C006/13.08.30%20Bitburner%20Waterblocks.JPG
And of course with less coolers you have to do less tubing.

Regards Andre

Thanks for the info...

I've already got 100 of these boards being fabbed, but I'll take all this into consideration for the next iteration

[erk]

Thanks for the info...

I've already got 100 of these boards being fabbed, but I'll take all this into consideration for the next iteration

Are you going to sell the things?