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Author Topic: GekkoScience BM1384 Project Development Discussion  (Read 145309 times)
richardamullens
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March 23, 2015, 08:38:22 PM
 #181

In my opinion Home miner is a miner that can run on a normal electricity plug. 120V 15AMP (around that )

Don't forget us in Europe.  I know it is premature to say this but why not also manufacture in Europe or China.  Perhaps Olimex could make miners.  I seldom purchase from America as the delivery charges are often excessive.
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valkir
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March 23, 2015, 08:41:35 PM
 #182

Yeah I understand that but normally you can run on 240 with lower amp so its better to make it for 120v 15amp so that everyone can use it.  Wink

Dont worry you are lucky and you have 240v

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sidehack
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March 23, 2015, 08:43:48 PM
 #183

As long as the United States still has people that need jobs, we will never outsource manufacture to a different country.

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March 23, 2015, 08:59:57 PM
 #184

Just my 2c - let's do less politics and more business Wink

And one thing at a time - I guess it will have to start from somewhere, so if it is 120V - so be it. At the end of the day you will plug a power supply unit that will convert from whatever AC you have to (most likely) 12V or 5V which is what the board will use. I'm sure you can find a suitable PSU for every single country in the world. But that's a completely separate issue.

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March 23, 2015, 09:11:43 PM
 #185

Not outsourcing labor is one of the standard policies we've had since the beginning. The only reason to sell jobs overseas when people right here need work is greed, and some folks might have noticed that's not how we operate.

Also we're not building anything with a built-in PSU. So it doesn't matter if you use 120V or 240V. Just use whatever PSU you have.

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March 23, 2015, 09:47:46 PM
 #186

The Prisma used a node-level FET as a backup current shunt to help keep voltages down on underperforming nodes. This doesn't really help efficiency since the power is being burned off in a FET instead of the ASIC, but it does help manage node-level voltages. I'm not sure how necessary it really is.

I thought that Prisma's FETs are simplified on S5's by using few schottky diodes like zener, each regular diode has 0.7V treshold, but using two in series can restrict maximum voltage to 1.4V approx. per chip, or using three schottky can adjust max. voltage at different level, but temperature will affect it significantly. So I wish you good luck tuning this circuit.

Regarding size and power - I think there might be a demand for passive or ultra quiet miners for home miners - remember that most of us upgraded from Girlfriend 7.1 to Wife 1.0a who is very sensitive about our hobbies, especially when they are noisy. A heating panel with 450W can be good starting point, output power can be "programmed" by switch with pre-defined voltage/freq. Just on fly idea. Nowadays best eff vs ROI is around 0.75W/GHs.

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March 23, 2015, 09:48:59 PM
 #187

Not outsourcing labor is one of the standard policies we've had since the beginning. The only reason to sell jobs overseas when people right here need work is greed, and some folks might have noticed that's not how we operate.

Also we're not building anything with a built-in PSU. So it doesn't matter if you use 120V or 240V. Just use whatever PSU you have.
Great to hear, by the way where in the US are you guys located?

richardamullens
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March 23, 2015, 09:49:20 PM
 #188

I understand what you are saying and it is perfectly fair, but I said "why not also manufacture in Europe or China"

If you can't sell into Europe or elsewhere because of taxes or delivery charges then you lose nothing by also manufacturing elsewhere.

However, I applaud what you are doing.  Bitmain's U3 device used items that the home miner could easily source for themselves making it uneconomic to ship.  Do what you do best of all.
sidehack
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March 23, 2015, 10:06:01 PM
 #189

If someone in Europe wanted to license the design and manufacture it themselves, sure. But anything with our logo on it will be Made in USA (specifically, Missouri). Keeping things local - within our own oversight at least - also means quality control. We can't make sure that someone 8000 miles away is doing things right all the time.

Girlfriend? Wife? Obviously you don't spend enough time working on awesome stuff if you have time for friends and things better than friends.

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March 23, 2015, 11:02:01 PM
 #190

If i can get 100Mh/s for $50-100 Shipped to me, im good with that.
I sure hope you meant 100Gh/s Wink


nah! i meant KH/s !!!

goodney
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March 24, 2015, 06:15:21 AM
 #191

Snazzy board. What regulator controller are you using? I haven't really found one with the features I want but I can work around what I got.
TI TPS51363.
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March 24, 2015, 09:38:45 AM
 #192

I understand what you are saying and it is perfectly fair, but I said "why not also manufacture in Europe or China"

If you can't sell into Europe or elsewhere because of taxes or delivery charges then you lose nothing by also manufacturing elsewhere.

However, I applaud what you are doing.  Bitmain's U3 device used items that the home miner could easily source for themselves making it uneconomic to ship.  Do what you do best of all.

Delivery costs from the US shouldn't be too bad. What happens in Europe is you get hit with VAT as there isn't any duty.

But its a misnomer to think you can get miners "Tax Free" by assembly or manufacture in Europe, whoever sells it still has to charge VAT on top.

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March 24, 2015, 10:49:23 AM
 #193

As long as the United States still has people that need jobs, we will never outsource manufacture to a different country.

Wow  Shocked

Could you contact GE & several other large corporations & get them to see things that way  Cheesy

This thread brings back awesome memories of summer of 2013,when 1000's of us got involved with the Avalon Group Buys  Cool

Let's hope it dosen't turn out like them...due to Bitmain chips being late or not delivered  Roll Eyes

At least we don't have "preorder" money on the line!! Thanks sidehack!! Best of luck man!!  Wink

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sidehack
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March 24, 2015, 12:33:56 PM
 #194

Yeah, funny you should mention... My contact at Bitmain hasn't gotten me any good info about getting chips, but recommended I wait until their next-gen chip is available but I won't get any info about designing with it until it's released so when you factor in dev and prototype time I wouldn't have a working board to test until probably August, so sellable machines about September. I'm gonna see if I can find someone higher on the food chain to talk to.

I um... I did get ahold of Canaan-Creative and they'll probably have a new chip out about the same time, maybe sooner. So if they're any more reasonable about getting datasheets and samples I might switch it up.

Spotswood
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March 24, 2015, 12:50:20 PM
 #195

Please add 4x mounting holes at the corners of the board.   Wink

dunand
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March 24, 2015, 01:01:08 PM
 #196

I want to cool them with a waterblock instead of a heatsink.
pekatete
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March 24, 2015, 01:02:37 PM
 #197

Yeah, funny you should mention... My contact at Bitmain hasn't gotten me any good info about getting chips, but recommended I wait until their next-gen chip is available but I won't get any info about designing with it until it's released so when you factor in dev and prototype time I wouldn't have a working board to test until probably August, so sellable machines about September. I'm gonna see if I can find someone higher on the food chain to talk to.

Thats what I call being strung up properly! I suppose a lesson for all, not everyone that passes off as a bitmain representative is anything like they'd want you to believe, but then again, that is the art of passing off.

daddyfatsax
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March 24, 2015, 01:26:39 PM
 #198

I want to cool them with a waterblock instead of a heatsink.

Please no more watercooled miners. I loved my Habaneros, but dealing with a cooling loop is a little much at times.
sidehack
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March 24, 2015, 01:28:21 PM
 #199

Please add 4x mounting holes at the corners of the board.   Wink

You mean like the holes that are already going to be there?

I want to cool them with a waterblock instead of a heatsink.

Okay, strap 'em on a C1 waterblock.

kingcolex
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March 24, 2015, 02:24:10 PM
 #200

Yeah, funny you should mention... My contact at Bitmain hasn't gotten me any good info about getting chips, but recommended I wait until their next-gen chip is available but I won't get any info about designing with it until it's released so when you factor in dev and prototype time I wouldn't have a working board to test until probably August, so sellable machines about September. I'm gonna see if I can find someone higher on the food chain to talk to.

I um... I did get ahold of Canaan-Creative and they'll probably have a new chip out about the same time, maybe sooner. So if they're any more reasonable about getting datasheets and samples I might switch it up.
Which representative is it? I know the David guy was terrible but supposed to be high up there but he always pushed everything off and wasn't actually in china but the Netherlands.

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