I'm wanting to build a stir plate to grow yeast for home brewing. If you want to know what it is or how it works, you can check this out. But it is not necessary.
In a nutshell, I need to get some DC power (12V, 1 - 2 amps), and send it to a switch, then a potentiometer, then to a regular 120mm computer case fan. That's it. When I went to Radio Shack I saw that their porentiometers said they were 1 watt, or half watt. And when I googled amp, volt, watt calculator and put in what I'm working with, it gave me 12 watts for 1 amp, and 24 watts for 2 amp (depending on which DC power supply I get). That having been said, I can't use those potentiometers can I? The guy there didn't have a clue. And I don't want to burn my apartment down.
In a nutshell, I need to get some DC power (12V, 1 - 2 amps), and send it to a switch, then a potentiometer, then to a regular 120mm computer case fan. That's it. When I went to Radio Shack I saw that their porentiometers said they were 1 watt, or half watt. And when I googled amp, volt, watt calculator and put in what I'm working with, it gave me 12 watts for 1 amp, and 24 watts for 2 amp (depending on which DC power supply I get). That having been said, I can't use those potentiometers can I? The guy there didn't have a clue. And I don't want to burn my apartment down.