Where is the fan resistor blower?
Because resistance creates heat while current is flowing, the blower resistor is mounted in the duct near the blower motor so the resulting airflow will keep the resistor cool.
Is it OK to use a higher wattage resistor?
Yes, you can use it. It will give you an ability to source in more current. To avoid the size of the resistor getting large due to high wattage, you can use SMD resistor. This will not only save space on your PCB but your PCB will look descent as compared to the through hole resistor of same power rating.
Can I use a 2 watt resistor instead of 1 watt?
You can almost always use the larger wattage resistor. There are cases with high-speed circuits where you have to select a resistor with lower capacitance or inductance or even changes in resistance vs temp. But, in general, bigger is fine except it take more board space, and costs more.
Do watts matter in resistors?
Generally speaking the larger their physical size the higher its wattage rating. When resistors with higher wattage ratings are required, wirewound resistors are generally used to dissipate the excessive heat.
How do you determine the wattage of a resistor?
It’s calculated by multiplying the voltage difference across two points by the current running between them, and is measured in units of a watt (W). Light bulbs, for example, power electricity into light. But a resistor can only turn electrical energy running through it into heat.
Is a resistor active or passive?
Components incapable of controlling current by means of another electrical signal are called passive devices. Resistors, capacitors, inductors, and transformers are all considered passive devices.
Is an LED active or passive?
Some examples of active devices include solenoids, relays, LEDs, and microcontrollers or any other integrated chip that uses an external supply voltage (or current) to perform work or the intended function. LEDs are light emitting diodes, and we state above that diodes are considered passive.
Is Zener diode active or passive?
A diode can be active or passive, depending on its property. A normal junction diode PN is passive, while the tunnel diode or zener diode is active because of their negative resistance property.