Happy HolidaySs Giveaway - Last Sponsor Giveaway of the Year!

Come Enter the BrewDeals/FastFerment Giveaway!

 Home Brew Forums > Basic Electrical Question
03-06-2013, 07:55 PM   #1
Feedback Score: 0 reviews
Recipes

Join Date: Jul 2011
Location: Boise, ID
Posts: 3
 Basic Electrical Question

I am not very knowledgeable when it comes to electricity. What I am trying to find out is what is the appropriate power supply (wall wart) to supply my variable AC-DC voltage regulator, which powers my pump. Here is what I purchased...

The pump - http://shop.solarproject.co.uk/sp202...3230-p-10.html.

The AC-DC Variable Voltage Regulator - http://www.engineeringshock.com/lm317-module.html

The pump manufacturer sells a wall wart style power supply, which I do not have, http://shop.solarproject.co.uk/sp312...ptor-p-22.html (out of the UK), which supplies 12v DC @ 1500mA.

I need a wall wart to power feed my variable voltage regulator. But I have no idea how to maximize the amount of juice I can feed it. Can anyone tell me how to figure out what wall wart to use?

I currently have a 12v, max 1.0a wall wart, but the voltage regulator is having trouble operating the pump very well. Does any of this make sense?

__________________

03-06-2013, 08:35 PM   #2
Maxkling
Feedback Score: 0 reviews
Recipes

Join Date: Oct 2010
Location: Atlanta, Georgia
Posts: 506
Liked 22 Times on 9 Posts

What size (watt) pump did you get?

If you have a 14 watt pump the controller and wall wart are under powered.

I'm a little confused, you want to control the speed of the pump? I'm not sure why you have the controller, it states the pump will work in a range of 9-14VDC, not much of a range, all you are doing is under powering the pump and driving up the amperage of the circuit by not running at least 12 volt. Plus what is the lift of this pump, can't be much?

__________________

"It’s so simple to be wise. Just think of something stupid to say and then don’t say it."

"Gun Control Means Using Both Hands."

03-06-2013, 09:29 PM   #3
jCOSbrew
Feedback Score: 0 reviews
Recipes

Join Date: Feb 2012
Posts: 617
Liked 38 Times on 34 Posts
Likes Given: 7

I have a similar (topsflow) 12v DC pump and I control the pump flow rate with a ball valve. Ideally, the ball valve should be at the input to the pump.

__________________

03-07-2013, 01:39 AM   #4
thargrav
Registered User
Feedback Score: 0 reviews
Recipes

Join Date: Dec 2009
Location: Huntsville, Alabama
Posts: 821
Liked 38 Times on 35 Posts
Likes Given: 2

Quote:
 Originally Posted by wazzubrad I am not very knowledgeable when it comes to electricity. What I am trying to find out is what is the appropriate power supply (wall wart) to supply my variable AC-DC voltage regulator, which powers my pump. Here is what I purchased... The pump - http://shop.solarproject.co.uk/sp202...3230-p-10.html. The AC-DC Variable Voltage Regulator - http://www.engineeringshock.com/lm317-module.html The pump manufacturer sells a wall wart style power supply, which I do not have, http://shop.solarproject.co.uk/sp312...ptor-p-22.html (out of the UK), which supplies 12v DC @ 1500mA. I need a wall wart to power feed my variable voltage regulator. But I have no idea how to maximize the amount of juice I can feed it. Can anyone tell me how to figure out what wall wart to use? I currently have a 12v, max 1.0a wall wart, but the voltage regulator is having trouble operating the pump very well. Does any of this make sense?
The largest of the three pumps is listed at 14 watts and 14 watts at 12V is 1.1 amps. This is why the manufacturer supplies a 1.5 amp supply and why yours is straining. To be on the safe side you need to look for a 2 amp 12V power supply.
__________________