Ghobar Posted October 10, 2016 Share Posted October 10, 2016 I honestly don't remember (it was a while back). I think I just used a battery to test which connections to make so that the fan would increase/decrease speed with the turning of the pot. The wiring that the website shows is for volume or lighting control. It assumes three wires, but we only have two for a fan. So I think one wire needs to be connected to two ports on the pot. I can't access the webpage, but I will try to guess its content. The difference is the configuration of the potentiometer, it can be used as a variable resistor (which will control current passing through the fan), or can be used as a voltage divider (which will control the voltage across the fan). Basically: Variable resistor -> Potentiometer (also named rheostat only for this configuration) is connected in series with the fan, therefore, both of them will have the same current, but different voltages. Voltage divider -> Potentiometer is in parallel with the fan, therefore, both of them will have the same voltage, but different currents passing through each one. I connected the potentiometer as told by ajnl in his tutorial. Now there is a problem: The turning of potentiometer can reduce the speed ONLY by ONE THIRD! My fan's full speed is about 1530; turning the pot to the lowest only reduces the speed to about 930. I want to have the full range of potentiometer, or at least a wider range. What is your idea? What is your solution? Good luck Quote Link to comment Share on other sites More sharing options...
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