It's quite likely your car already has one.Good grief, what automotive fan draws 19Amps? I'm not saying it isn't so. I just want to know so I never buy a vehicle that has one!
Wow. I'm as surprised at how low that amps rating is as people were surprised at the high 19 A figure!...
The RB: I know that many radiator fans are electric motor powered, I was surprised at the 19 amps but I guess that is not too far out of line. However, my 2.4 liter Toyota engine's electric radiator fan is rated at 3.4 amps.
it is out of a race car that crashed. I am using the fan in my farm tractor. It is a Flex-a-lite 580 dual motor fan. When it's on (had only one speed) it is moving some air. I have the on/off/on switch so that is why I want twop speeds.....sorry for the delay in returning, you guys are quick. I am hoping for a simple fix.Alright, you've got us kicking conjecture all over the place. Are you going to tell us what the application of this fan is?
please do help with this MOSFET switch. I was doing some google but still need help.U will need a MOSFET to do this....I guess our Sgt will be up for the task
A MOSFET is basically an electric switch. Putting a voltage between the gate and source allows current to flow through the transistor (it's more complicated than that, but it should give you an idea).please do help with this MOSFET switch. I was doing some google but still need help.
Could I also use the resistor, high wattage that simply goes in series from sw to fan? There was metion of a 60W .6 ohm. Is the a radio shack purchase for either?
A MOSFET is basically an electric switch. Putting a voltage between the gate and source allows current to flow through the transistor (it's more complicated than that, but it should give you an idea).
A great way to control a motor is by using PWM, which basically turns the transistor on for a certain amount of time, then turns it off, then back on..repeatedly (and quickly) to vary the amount of current going to the motor. This is what the 555 timer is for.
You can get the 555 timer, and most components for the circuit from radioshack, but you'll need to get the transistor online (probably).
Using a resistor is very inefficient, as all of the energy that isn't going to the motor is just being dissipated as heat.
Well, then it's not much of a circuits project.So this looks like it's a field fabricated switch. I was hoping to buy it "pre-built" where all I have to do is install it. Remember this is a farm tractor, outside 100%, so I am hoping for a weather tight setup.
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by Robert Keim
by Jake Hertz