It is for a Plan B envelope generator (elf). The time range of the
A,D,R events is much too wide, making it so that only a small angle of
turn contains useful settings. So what would you recommend

I'm confused about what Stu said. Increasing resistance increases the
voltage throughput If you go to infinite resistance by breaking the
path then no signal goes through. If you add a resistor in a series
circuit, the voltage across each other resistor drops. Intuitively,
resistors slow down current, so adding resistance in the current path
should decrease the energy of the signal. So shouldn't the effect be
the opposite

Thanks,
Monroe

On 8/10/08, Tim Stinchcombe < timothy@... > wrote:
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> > Can someone answer the question of how to make a pot scale more
> > finely If you insert a resistor in the output path, does this
> divide
> > the voltage and weaken the effect of the pot I don't know much
> about
> > circuits.
>
> The answer is not very straightforward, as it depends on how the pot is
> being used. Generally to have more control with a pot, i.e. so that
> larger movements have less effect, so you can finely position it to
> *just* where you want it to be, you have to reduce its value. But then
> depending on how the pot is being used, you will need to add one or
> more resistors to compensate for this lowering of value: if the pot is
> actually being used as a potential divider (that is how the
> name 'potentiometer' is derived), you will need to add resistors either
> side to bring the total back up to the original value, but how much
> each side will depend on where out of the total range, the now reduced
> pot is to have its effect; if it is being used as a variable resistor
> (the wiper connected to either end or one end left open), again another
> resistor will probably be needed, but you will only need one, and which
> side of the pot it goes will not matter.
>
> If you have a particular pot in mind on a particular module, I might be
> able to make suggestions on exactly *what* values to use and *where* to
> add the resistors (depending on whether I have the circuit for that
> module of course!), but if it was a general question, then I'd suggest
> your best course of action would be to either look around on the web
> for some basics electronics sites (there will be tons out there!), or
> buy a beginners book (your local Maplins/Radio Shack/whatever will
> undoubtedly have something suitable), and then get studying! I'm afraid
> there is not substitute for you putting in some work in order to gain
> some understanding of how all this stuff works!
>
> Tim
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