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AFAICT the series resistor is to limit the current draw on the 5V pin..
Pull down resistor is from PWM output to ground.. IF I remember correctly..
Used to keep the lights off in the event of controller failure.
without it lights go "high"....
Better diodes, usually larger heat sinks though cheap fans sort of negate that, and yes, control is what really boosts thier price.
We could argue over and above what is err" correct pricing" but that's Capitalism for you..
what the market will bear..
Pull down resistor is from PWM output to ground.. IF I remember correctly..
Used to keep the lights off in the event of controller failure.
without it lights go "high"....
Better diodes, usually larger heat sinks though cheap fans sort of negate that, and yes, control is what really boosts thier price.
We could argue over and above what is err" correct pricing" but that's Capitalism for you..
what the market will bear..