This can be done, but it takes a different power supply, not this one. You need 2 amps, which is 2000 miliamps. Radio Shack probably has a 2000 miliamp unit if you search hard enough for it. If it is a variable voltage supply you can control the output of the pump by changing the voltage. Incidentally, I use that Radio Shack power supply to power my fan in my hood, and it works great. But, you need a bigger version of that.