There is something I can't really get about PWM. Hope someone can help clarify my mind.
Look at the picture attached.
I know that regardless of whether the supply for my FPGA/MCU is 5 V or 3.3 V, I want the low state to turn into 0 V across my fan, and the high state to turn into 12 V across it.
This is the question: If I have a duty cycle of 50%, is the voltage at the base of the transistor 2.5 (if 5V) and the voltage across the fan 6V?
Look at the picture attached.
I know that regardless of whether the supply for my FPGA/MCU is 5 V or 3.3 V, I want the low state to turn into 0 V across my fan, and the high state to turn into 12 V across it.
This is the question: If I have a duty cycle of 50%, is the voltage at the base of the transistor 2.5 (if 5V) and the voltage across the fan 6V?
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