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Old 03-06-2013, 07:55 PM   #1
wazzubrad
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Default 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?

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Old 03-06-2013, 08:35 PM   #2
Maxkling
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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?

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Old 03-06-2013, 09:29 PM   #3
jCOSbrew
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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.

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Old 03-07-2013, 01:39 AM   #4
thargrav
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Quote:
Originally Posted by wazzubrad View Post
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.
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