Please need help with this idea, dim LEDs and volume with a stereo pot

[arma61]

Hi

I've built this Buff 'n blend http://www.geocities.com/jrtookmyfalseteeth/buffblnd.gif


what I would like to do, if possible, is using a stereo pot, to let 2 LEDs dim or increase while you turn the pot, I've succeeded with one LED, but when I connect the other LED I don't get what I want I've connected in this way

+ -------/\/\/\---- LED ------- 3 !
- -------------------------------2 !pot's leg
                                         1 !
and the LED dims, but if I connect another LED in the same way to legs 2 and one, either both LEDs are on or off or dim together. I don't seem to be able to understand this why, and IF this can be done.

Do could you plse help me out with this, I would like to use a transparent plastic case with the two LEDs mounted on the 2 side of a plastic hose inside the box, so the result should be a "tube of light" (big word!!!), that dim and grow on each side turning the pot.

Thanks guys.
Ciao
Armando

[big bustle]

i'm guessing the LEDs are in series and not parallel? try wiring in parallel.

Are the the same color? different LED colors need different voltages

[Sock Puppet]

Would connecting the second LED with its own resistor between pin 1 of the pot and positive be what you're looking for?

S.

[arma61]

Hi, just reading what I wrote and find it's not really clear, what I want is

this box is blending the clear signal with the FXed signal, so what I want is that turning the pot, one LED's light dim while the other grow, and the other way round, that's why I also want to use two different colours of LEDs.

I think it's more clear now.

thx for help
Ciao
Armando

[Ozymandias]

And you are using a stereo pot ? Than my guess is you would have to wire up the upper three lugs as you've written down, and the lower three mirrored from what you have (ie lugs 1&2), but sure, I am not .

[ambulancevoice]

you mean something like this maybe???
dual gang pot

[arma61]

thx everybody, yes ambulancevoice that's what I mean, I've tried yesterday but directly with iron and components without drawing any schematic!, so I'm almost sure something was wrong! though being the pot 100K I think it would be hard to have bright led completely on or off, I've the feeling that a more complex circiut is needed to achieve something like that.

Ciao
Armando