Virus Posted May 2, 2006 Report Share Posted May 2, 2006 Hi GuysA million dollar question, and please I need help with this one. I know a little about ohm’s law etc. but still can’t figure this one out. Being a non electronic tech and wanting to build a fan controller and I need some expert advice.In the circuit I am building I am using a 10 k ohm multi-turn trimmer, but would prefer to use switches to select different resistors via a dip switch to change the resistance and thus change the fan speed. I have measured the lowest value at 2.5 K ohm and the top value at 3.5K ohm. Without the dipswitch and resistors R5 would be valued between 2.5 K ohm and 3.5K ohm. depending of the fan speed selected. Can I use different resistors R1 – R4 via the dip-switch to accomplish this? and what values will they be?What would the value of R5 need to be to start off with?I was thinking of building a small unit and start with soldering resistors together, but I think there is infinite combination, your input will be highly appreciative.Is their another way of doing this.Please and thank you ;D ;D ;DVirus Quote Link to comment Share on other sites More sharing options...
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