Hi, Polyna-Maude Racicot-Summerside wrote: > > Like I already wrote, modifying voltage doesn't change speed of a motor > > (fan).
to...@tuxteam.de wrote: > I disagree. [...] > I have no idea what the motherboard/fan manufacturers actually do, though. Voltage reduction is a tradional method to curb overly eager DC fans. I have seen successful use of resistor adapters between fan cable and mainboard. A quick search with "fan voltage control" yields https://en.wikipedia.org/wiki/Computer_fan_control#Linear_voltage_regulation and others which state that 2-pin and 3-pin are only controllable via voltage reduction whereas 4-pin indicate the capability for the competing method of Pulse-Width Modulation (PWM). Resistors can be seen at https://www.amazon.com/computer-fan-resistor/s?k=computer+fan+resistor rhkra...@gmail.com wrote meanwhile: > A voltage controlled DC (computer fan) motor can be controlled / > regulated down to about 40% of full rated speed (depending on the motor). That's what i read in the web and what i witnessed as effect of resistors on dumb fans. Have a nice day :) Thomas