About Running S5 on one controller and Fan control

[VirosaGITS]

So if i end up with a miner with a bad controller board and i want to put 4PCBs on one controller, is there a way to run 4 PMW Fans on that one controller? I can only see 2. Would a Y splitter for 2 identical fan would work?

I might want to merge every 2 S5 i can get this way to use less controllers and keep them as backup and also for easier miner management. Basically i'd have half as many miners to manage.

[RichBC]

Standard S5 only has a single fan, so you should be fine with 2 x S5 on a single controller? If you did want to drive 2 fans of a single connector then I do not think a simple Y splitter would work as you would have 2 sets of Tacho signals. What might work would be to just connect the Tacho signal from one fan and then the PWM drive to both? You would also have to check that the current draw was ok.

Rich

[VirosaGITS]

Standard S5 only has a single fan, so you should be fine with 2 x S5 on a single controller? If you did want to drive 2 fans of a single connector then I do not think a simple Y splitter would work as you would have 2 sets of Tacho signals. What might work would be to just connect the Tacho signal from one fan and then the PWM drive to both? You would also have to check that the current draw was ok.

Rich

I would figure that the controller would read one PWM signal and set the current to control the fan speed. Since one fan is being told for example to "run at 3k" the second fan on the Y splitter should also run at 3k. The controller will only read one but if both fan are the same there should be no issue?

I just need to know how to do the wiring, and the other thing is, can the controller support that much AMP? I'd ultimately be running up to 4 fans on it for less noise.

[pinhead666]

I have schematics, how pwm and speed are driven with older S3 controller,if it helps.With PIC,it is done 3V3 level,what are altera's levels?

[VirosaGITS]

I have schematics, how pwm and speed are driven with older S3 controller,if it helps.With PIC,it is done 3V3 level,what are altera's levels?

I'm not sure what do you mean. Altera levels? Sure i could have a look at the schematics for fun but i don't really see how i could make use of it here.

Im just wondering if the controller can feed 4 stock fan at full speed without breaking a sweat, then its just figuring out how PWM work when you fork 2 fan with a y connector but only connect 1 PWM to it so that both fans are controlled by pwm feed. Thats how its done on my GPUs, so i'm certain its possible. Just need to wire it right.

[pinhead666]

Sorry I'm not very good at explaining things.
PWM signal is common for all fans,right? So you don't really have to worry about it. Speed (or tacho) is separate for both fans. That is what you have to think. Just look at schematic,it's pretty simple and I think it's commonly used in BM miners.
http://kuvapilvi.fi/k/yDe1.jpg

[VirosaGITS]

Sorry I'm not very good at explaining things.
PWM signal is common for all fans,right? So you don't really have to worry about it. Speed (or tacho) is separate for both fans. That is what you have to think. Just look at schematic,it's pretty simple and I think it's commonly used in BM miners.
http://kuvapilvi.fi/k/yDe1.jpg

Thanks, i'll read up on PWM to see how the speed is transmited, since i assumed it just changed the voltage so the fan is set to a speed. This look like the speed controller is on the fan itself?

I'll also check on my GPU fan the next time i open up, since it does work with a y connector, but they're a bit different since they use a 3 pin and a 2 pin.

[pinhead666]

Sorry I'm not very good at explaining things.
PWM signal is common for all fans,right? So you don't really have to worry about it. Speed (or tacho) is separate for both fans. That is what you have to think. Just look at schematic,it's pretty simple and I think it's commonly used in BM miners.
http://kuvapilvi.fi/k/yDe1.jpg

Thanks, i'll read up on PWM to see how the speed is transmited, since i assumed it just changed the voltage so the fan is set to a speed. This look like the speed controller is on the fan itself?

I'll also check on my GPU fan the next time i open up, since it does work with a y connector, but they're a bit different since they use a 3 pin and a 2 pin.

I also thought at first that it's simply voltage driven,but it's not that simple.That's why I asked Alteras's signal levels.This circuit has some voltage dividing,and it is driven with 3V3 logic. I left some caps out of the schematic,to make it simpler.But that's the basic circuit.

[VirosaGITS]

Sorry I'm not very good at explaining things.
PWM signal is common for all fans,right? So you don't really have to worry about it. Speed (or tacho) is separate for both fans. That is what you have to think. Just look at schematic,it's pretty simple and I think it's commonly used in BM miners.
http://kuvapilvi.fi/k/yDe1.jpg

Thanks, i'll read up on PWM to see how the speed is transmited, since i assumed it just changed the voltage so the fan is set to a speed. This look like the speed controller is on the fan itself?

I'll also check on my GPU fan the next time i open up, since it does work with a y connector, but they're a bit different since they use a 3 pin and a 2 pin.

I also thought at first that it's simply voltage driven,but it's not that simple.That's why I asked Alteras's signal levels.This circuit has some voltage dividing,and it is driven with 3V3 logic. I left some caps out of the schematic,to make it simpler.But that's the basic circuit.

Thanks for giving me the simple version then, i'm pretty bad at circuitry, i actually skipped that part in school, haha. xD

I did a bit of reading now and found this;
http://www.newegg.ca/Product/Product.aspx?Item=N82E16812162026&cm_re=pwm_splitter-_-12-162-026-_-Product

This show me how i can do it myself or just grab a couple since they're nice and sleeved, more professional than what i could make myself with solder and electric tape.

I still need to figure out how much power the controller can support, however. I'm basing on the S5+/S7 where the controller has a PCI-e connector just for itself, probably for all the fans a S5+ has and how many a S7 also have on a 3x setup.

[pinhead666]

Yes,that is what I mean. You propably can take PWM and tacho signals straight from controller but you have to add external 12V and GND to extra fans. That's how I have done my extra fan designs for 8 S3 hashboards.And have to use that circuit or similar like it,too.I don't know exact diode,but I think some 4007 or 4148 should work.

[VirosaGITS]

Yes,that is what I mean. You propably can take PWM and tacho signals straight from controller but you have to add external 12V and GND to extra fans. That's how I have done my extra fan designs for 8 S3 hashboards.

Ahhh i see. What did you use to do that? You're probably using Molex from the PSU to power the fans? Just seem a bit weird to be powering the fan from a different port than where you plug the PWM fan.

Unless you used some kind of PWM hub? You plug the hub in the controller and then add a PSU to the hub, basically like a USB hub we commonly use?

Also do you have a picture of that S3 stack? Just curious.

[pinhead666]

I did some experimenting for my S1-S3 adapter and was asked to add extra connectors for 2 more fans. I looked at how the fans are driven and found that circuit on the hashboard. So I understood that connectors without any circuitry are not usable. I have no actual photos of adapter right now,but here is how PCB looks like. J10 and J11 are extra fan connectors. They can be driven with signals from J6 and J8 or from external source. I'm designing PWM controller for a much bigger fan now (not miner related) and added those connectors partly to toy with that controller too. I will post pictures of my monster miner when I have it all set up nice enclosure.

http://kuvapilvi.fi/k/yDFB.jpg

[pinhead666]

And I just solder extra wires from hashboard 12V to that adapter. I have only prototype now,so no pics 'till I get factory made PCB.

[VirosaGITS]

And I just solder extra wires from hashboard 12V to that adapter. I have only prototype now,so no pics 'till I get factory made PCB.

Thanks a lot.

I'm also wonder if you or anyone know what is the lowest temperature you should let the temp go down to or whats the lowest ambient temp the miner should be run in ?
I ran my zeus at -10C last year so... I'm wondering about the actual dangers on running them around 0C are.

[pinhead666]

And I just solder extra wires from hashboard 12V to that adapter. I have only prototype now,so no pics 'till I get factory made PCB.

Thanks a lot.

I'm also wonder if you or anyone know what is the lowest temperature you should let the temp go down to or whats the lowest ambient temp the miner should be run in ?
I ran my zeus at -10C last year so... I'm wondering about the actual dangers on running them around 0C are.

I have run miners (dragon A1,S1,S3) last winter and temperatures were sometimes below -20C. I had them in a wooden warehouse without heating. They kept the warehouse temp above 0C. I just didn't shut them down ever. If they are powered down and get frozen, condensed water would propably be a problem. I let them run through winter and had no problems (with temps).

[VirosaGITS]

And I just solder extra wires from hashboard 12V to that adapter. I have only prototype now,so no pics 'till I get factory made PCB.

Thanks a lot.

I'm also wonder if you or anyone know what is the lowest temperature you should let the temp go down to or whats the lowest ambient temp the miner should be run in ?
I ran my zeus at -10C last year so... I'm wondering about the actual dangers on running them around 0C are.

I have run miners (dragon A1,S1,S3) last winter and temperatures were sometimes below -20C. I had them in a wooden warehouse without heating. They kept the warehouse temp above 0C. I just didn't shut them down ever. If they are powered down and get frozen, condensed water would propably be a problem. I let them run through winter and had no problems (with temps).

Okay, thank you, that make sense now that i think about it. I know someone who build electric boards for speakers and i remember telling me it was okay for his speaker to be outside as long as they stayed powered.

In that sense, can it be safe to overload a PSU during winter because its being supercooled? As in, is degradation caused by heat the only reason overloading a PSU is not recommended?

My S4 has a shit PSU and just running it at stock setting make it pull more watt from wall than what its rated at >.>