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Author Topic: How to start S9 fans before the actual controller / boards (humid environment)  (Read 830 times)
AtraxPool
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September 16, 2017, 01:08:55 PM
 #21

Why not take the fans from the miners and hook them up to a relay and speed control switch. that way you can turn them on alone first to dry out the miners then once ready you can power up the miners and hand control of the fans back to the miner?

But note if you do this you will be pushing cold air over damp electronics.  I highley recomend you find somewhere that is more suitable and less dangerous!

So this is the kind of answer i'm looking for, thanks Atrax. Can you elaborate on a potential set-up as you describe but controlling 30-70 S9's? What would be the most efficient set up to power all 30-70 fans using this relay-switch configuration?

Unfortunately, my source of power is cheap but I have 0 alternative options for alternate set-up. I'll elaborate on what I'm doing specifically in a later post, for now I'd prefer to keep it undisclosed until I can test it out.

I was thinking since you obviously have power restored by the time you are planning on drying out your miners. You may want to set up a few different fans to blow onto your miner set up, once everything is up and running with a dehumidifier or 2.

Another option is looking into Desiccant trays/bags/packets placed throughout the container during layup periods. It is what is used inside boilers during dry layups during prolonged downtime, to prevent moisture and corrosion.

I would also look into trying to seal whatever you can to reduce the exposure to the elements during these periods; and as much as you can during operation.

-Yes setting up fans could work but activating the S9's fans would be far more efficient.
-Good idea on the Dessicant! It's not ideal as it adds to the operating cost / overhead but it might be something I'm forced to do.

Thanks for the helpful feedback everyone. It's too bad I can't just modify the firmware to only power up the S9's fans on start-up (?).



Well what I would do is tap into the wires on each miner possibly with block or crip connectors and hook them all into a series then power them by a seperate source and controll them via some form of speed controll like here.

https://www.ebay.co.uk/p/12v-PWM-PC-CPU-Fan-Temperature-Control-Speed-Controller-Module-High-temp-Alarm/835782064?iid=302358014128

That way your miner boards do not draw any power and are safe while the fans dry out the boards.

But I would 100% say a dehumidifier would be the main thing you should be investing in to help take that moisture out the air and will help to cure the issue you are facing in the first place.

Please note I am not responsable if you damage anything but this is what I would do.  Might take a while to hook them all up but it will be much better that letting them be damp on startup just remeber to let the miner controll the fans once you are finished possily pop a switch in the series that can hand controll back to the miners once finished.

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Elphamyto
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Today at 02:13:46 AM
 #22

Why not take the fans from the miners and hook them up to a relay and speed control switch. that way you can turn them on alone first to dry out the miners then once ready you can power up the miners and hand control of the fans back to the miner?

But note if you do this you will be pushing cold air over damp electronics.  I highley recomend you find somewhere that is more suitable and less dangerous!

So this is the kind of answer i'm looking for, thanks Atrax. Can you elaborate on a potential set-up as you describe but controlling 30-70 S9's? What would be the most efficient set up to power all 30-70 fans using this relay-switch configuration?

Unfortunately, my source of power is cheap but I have 0 alternative options for alternate set-up. I'll elaborate on what I'm doing specifically in a later post, for now I'd prefer to keep it undisclosed until I can test it out.

I was thinking since you obviously have power restored by the time you are planning on drying out your miners. You may want to set up a few different fans to blow onto your miner set up, once everything is up and running with a dehumidifier or 2.

Another option is looking into Desiccant trays/bags/packets placed throughout the container during layup periods. It is what is used inside boilers during dry layups during prolonged downtime, to prevent moisture and corrosion.

I would also look into trying to seal whatever you can to reduce the exposure to the elements during these periods; and as much as you can during operation.

-Yes setting up fans could work but activating the S9's fans would be far more efficient.
-Good idea on the Dessicant! It's not ideal as it adds to the operating cost / overhead but it might be something I'm forced to do.

Thanks for the helpful feedback everyone. It's too bad I can't just modify the firmware to only power up the S9's fans on start-up (?).



Well what I would do is tap into the wires on each miner possibly with block or crip connectors and hook them all into a series then power them by a seperate source and controll them via some form of speed controll like here.

https://www.ebay.co.uk/p/12v-PWM-PC-CPU-Fan-Temperature-Control-Speed-Controller-Module-High-temp-Alarm/835782064?iid=302358014128

That way your miner boards do not draw any power and are safe while the fans dry out the boards.

But I would 100% say a dehumidifier would be the main thing you should be investing in to help take that moisture out the air and will help to cure the issue you are facing in the first place.

Please note I am not responsable if you damage anything but this is what I would do.  Might take a while to hook them all up but it will be much better that letting them be damp on startup just remeber to let the miner controll the fans once you are finished possily pop a switch in the series that can hand controll back to the miners once finished.



The relay idea is probably a terrible one, for a few reasons. First, what amperage is that can controller rated for? Things that cost less than $10 and don't come with a datasheet (like that item from eBay) are not going to be able to drive high power dc fans, let alone 20 of them (or however many you have). Do you think you can splice into each lead from a 4 wire PWM and have it run like this? What about isolation: do you want these fans powered by a separate source? Either answer, "yes" or "no" leads you to new problems, such as diode protection for reverse voltage when the miners are off but the fans are on, and what about voltage spikes from the miners turning on/off running to the separate controller? Is the separate relay/controller going to interfere with the PWM signal or sense signal when the miner is running and monitoring its own speed?
AtraxPool
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Today at 10:02:01 AM
 #23

I do agree about that controller it was only supposed to be a reference to what is out there.

There are boards that can handel much higher loads on rs500 website and there are many other solutions available as a controller for this.

Once the miners were connected there could be a switch to revert the circuit so when the power is handed back to the miners the is no chance of any spike causing issue in the chain.

Really the guy has little choice to his issue a dehumidifier and fans may be the best option available is he can't find a suitable location for the rigs to live.

The fans don't need to spin at full speed so they do not need such a high draw even the movement of the air at low speed would help to dry out the boards before the main switch on.

BestShare - 9 Billion & Counting - Hunting a Block
TechnoBoy12345
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Today at 01:55:21 PM
 #24

Humid environment is still a big risk for your miners with corrosion risk and etc.

Yeah we all know that this problem is faced by everyone nowadays I ordered a new
Ant Miner S9 from China the delivery was fast and my S9 works marvelous, I am satisfied with it, in case any wants to order here is the whatsapp number:  +8615726628156
I would really recommend buying from this store, they also have D3 and L3+.
Hope this helped.
Peace  Wink
Steamtyme
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Today at 02:23:29 PM
 #25

Humid environment is still a big risk for your miners with corrosion risk and etc.


Yeah we all know that this problem is faced by everyone nowadays I ordered a new
Ant Miner S9 from China the delivery was fast and my S9 works marvelous, I am satisfied with it, in case any wants to order here is the whatsapp number:  +8615726628156
I would really recommend buying from this store, they also have D3 and L3+.
Hope this helped.
Peace  Wink


This post has nothing to do with OP's question.
I'm also going to assume you and this no name store are fishing for free money. 
Please take your scam posts elsewhere or better yet just give up
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