Does a fan need a resistor?
Does a fan need a resistor?
With a 12V fan you dont need resistor for the fan. Unless its a fan you’re really worried about protecting I’d just “run it”. I’ve had PC fans on some dirty power before. Cheao-o “wall warts”, over-volted sometimes by double their rated voltage.
How do you cool a resistor?
If you really want to run things cooler then you’ll need heat sink mounted resistors and have a fan blowing on the fins of the sink. Actually the fan is optional, you could depend on natural convection. But if you’re that concerned about the amount of heat then the heat sink is the way to go.
What resistor do I need for 12v fan?
The Resistor value needs to be in the range 16 to 35 Ohms, with a power rating of 1 W. Use the lower end if you want the fan speed to be higher, and MAYBE use a 2 W resistor to be sure it does not get overheated.
What does a resistor on a cooling fan do?
The cooling fan resistor is an electrical resistor that limits power to the fan in steps, so that the fan can operate at different speeds according to the cooling system’s demands.
Is there a way to cool a hot resistor?
To answer your question about cooling them – you could simply add a fan to strip away the heat. Not likely necessary, but that’s one solution. Another would be to remotely mount 10 watt resistors and run wires to their original locations to move the heat energy away from the board. I’ve seen boards cook over time from hot resistors.
What happens when you turn off the cooling fan?
In certain cases, the cooling fans may even stay on when the vehicle is turned off, and will create a large parasitic drain that will eventually kill the battery. The cooling fan resistor is an important component, as it is one of the components that routes power for the cooling fans.
Do you need resistors for a heat sink?
Even if you put a 100 watt resistor there, there’s still 5 watts of heat energy to be dissipated. If you really want to run things cooler then you’ll need heat sink mounted resistors and have a fan blowing on the fins of the sink. Actually the fan is optional, you could depend on natural convection.
The cooling fan resistor is an electrical resistor that limits power to the fan in steps, so that the fan can operate at different speeds according to the cooling system’s demands.
To answer your question about cooling them – you could simply add a fan to strip away the heat. Not likely necessary, but that’s one solution. Another would be to remotely mount 10 watt resistors and run wires to their original locations to move the heat energy away from the board. I’ve seen boards cook over time from hot resistors.
In certain cases, the cooling fans may even stay on when the vehicle is turned off, and will create a large parasitic drain that will eventually kill the battery. The cooling fan resistor is an important component, as it is one of the components that routes power for the cooling fans.
What are the symptoms of a bad radiator fan resistor?
WHAT RADIATOR FAN RESISTOR IS. WHAT IT DOES AND SYMPTOMS OF A BAD RADIATOR FAN RESISTOR – YouTube
