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Author Topic: 2 amp variable resistor?  (Read 1517 times)

Geet Lord

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2 amp variable resistor?
« on: May 25, 2006, 10:05:54 AM »

hey guys its been a while since ive been around here.
I am curentyl working on a project in which I need to severly limit the flow rate of a 12V DC water pump, and I need to have variable controll of tis flow rate. initialy I planned on simply putting a variable resistor on  it in the same way I have to controll my case fans, however this pump pulls about 2 amps at max load which is far too much for any variable resistor that I have in my electronics box. I would only need about a 25 ohm variable resistor but it would need to also be able to take the current without burning out. Are there variable resistors that will solve this problem, or is there a much better solution tot this controll problem that I need to try.


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Re: 2 amp variable resistor?
« Reply #1 on: May 26, 2006, 01:38:25 AM »

An adjustable voltage regulator should do the trick.  Something like a LM1085.
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