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Old 27-11-2017, 01:27 PM   #261
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I ordered and received a 6-30v DC 8A max speed controller with digital display and I am trying to connect it to a 12v AC power supply to control a 12v DC pc fan with 4 wires.
Hi!
If your speed controller is DC, you need an AC/DC adapter - like a phone charger, but rated at 12v.
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Old 27-11-2017, 01:42 PM   #262
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Hi!
I know it's a couple of months since you posted, and I've already built my stir plate in a project box, but, as I was idly browsing around the supermarket I noticed that the "tins" of Heroes, Quality Street etc. are made of plastic. I wondered whether the lid would be strong enough to support a 2 or 3 litre starter?
Of course the problem then is: who's going to eat the sweeties?
That's what I use, though I turned it upside down like so:

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Old 27-11-2017, 02:42 PM   #263
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Hi!
Great minds think alike . . . lesser minds rarely differ
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Old 27-11-2017, 04:19 PM   #264
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The ingenuity of the members of this Forum NEVER fail to amaze and impress me!
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Old 27-11-2017, 08:10 PM   #265
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Hi!
If your speed controller is DC, you need an AC/DC adapter - like a phone charger, but rated at 12v.
Thanks very much for the help.
I will look for an old phone charger, I'm sure someone will have one laying around.

Cheers
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Old 28-11-2017, 12:21 PM   #266
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Originally Posted by Bigcol49 View Post
Hi!
I know it's a couple of months since you posted, and I've already built my stir plate in a project box, but, as I was idly browsing around the supermarket I noticed that the "tins" of Heroes, Quality Street etc. are made of plastic. I wondered whether the lid would be strong enough to support a 2 or 3 litre starter?
Of course the problem then is: who's going to eat the sweeties?
Cheers Col thanks for remembering. To be honest i still have it on lego but that's a brilliant idea and i will go and buy a tub. Steve yours looks quality. I did buy one of these to house a STC and was thinking of using it but its not very wide. http://www.ebay.co.uk/itm/Pro-Waterp...72.m2749.l2649

I ordered one of these the other day as i thought it may be fun and possibly even usefull to know what speed its running at. Will post back when its installed. http://www.ebay.co.uk/itm/Digital-Le...72.m2749.l2649
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Old 28-11-2017, 12:50 PM   #267
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Hi!
I had a "spare" project box - it was just a little too small to build my mash controller earlier this year. It's too deep so I had to mount the fan on a raised "platform" inside the box - I used a 220V fan as I couldn't get a 12V fan to work.
I've already built a variable voltage controller linked to a socket mounted into a project box. It occurred to me that my stir plate doesn't need a separate speed controller - I plug it into the voltage controller and it works just fine. I will eventually adapt the stir plate to take a speed controller but for now, it works fine.
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Old 28-11-2017, 08:29 PM   #268
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........

I ordered one of these the other day as i thought it may be fun and possibly even usefull to know what speed its running at. Will post back when its installed.

........
Looking forward to seeing what revs you get.

With mine I just keep winding it up until either A) It pulls a fairly deep vortex. or B) The spinner decides to go walk-about, the vortex dies and the spinner nips over to the side of the jug and sulks.

Unfortunately, B) happens all too regularly if I wind the speed up too quickly. I think it's because I don't have the little magnets perfectly aligned on the fan.

Luckily, it still works well enough for my purposes.
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Coopers Stout Kit + Grain (15/06/17)
AG Vienna Lager with Hallertau (12/11/17)
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Wilco's Pilsner with Lowicz Cherry Syrup (12/11/17)
AG Low ABV Pale Ale (19/11/17)

Carbonating/Conditioning
Spiced Pumpkin Ale

Fermenting
Golden Pumpkin Ale
AG Oatmeal Stout

Note:
(**/**/**) = Date ready to drink.
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Old 09-12-2017, 06:08 AM   #269
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Originally Posted by Old_P View Post
I ordered and received a 6-30v DC 8A max speed controller with digital display and I am trying to connect it to a 12v AC power supply to control a 12v DC pc fan with 4 wires.

However, when I connect the power supply to the speed controller, the power supply makes a buzzing sound and there is no respons from the display or fan?
The controller is a digital device and will not work with an AC supply input.

Quote:
I can run the fan with the power supply, by connecting the yellow (live) and black (earth) from the fan to the two wires of the power supply.
I was going to try to explain why this works for some motors, but as usual somebody on the internet has done it better already.

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Do I need a DC power supply or am I missing something??
Yes you do.
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Old 09-12-2017, 10:21 AM   #270
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The controller is a digital device and will not work with an AC supply input.

.........
I didn't even know that a 240v to 12V battery charger kept the supply at AC. Live and learn eh?

Personally, I try to avoid any 12v electric gizmo that has more than two wires ...

.... and I know I have done something wrong whenever I see a flash, see plastic melting or get "the smell"!
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Drinking
Coopers Stout Kit + Grain (15/06/17)
AG Vienna Lager with Hallertau (12/11/17)
Wilco's Hoppy Copper Bitter (12/11/17)
Wilco's Pilsner with Lowicz Cherry Syrup (12/11/17)
AG Low ABV Pale Ale (19/11/17)

Carbonating/Conditioning
Spiced Pumpkin Ale

Fermenting
Golden Pumpkin Ale
AG Oatmeal Stout

Note:
(**/**/**) = Date ready to drink.
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