3 color LEDs ?

[kraal]

Hello,

Maybe this is a stupid question, but how can I use leds with 3 legs (common cathode) to get 3 colors ?

I have some red/orange-green no-name 3 pins leds, as well as some lite-on 3 pins leds (common cathod on pin 2), but all I can obtain is 2 colors when pin 1 OR pin 3 is powered (red OR green).
If I power both pin 1 and 3 then I always only have one of the two initial colors (the one that predominates, i.e red) even if I lower the voltage of the red side.
So... what am I doing wrong ? Is it possible to get 3 colors (mix of red+green = orange or am I misunderstanding something ?)

I have the feeling the the problem lays between the keyboard and the chair I'm sitting on :-)

Thanks in advance !

[duck_arse]

do you have a single CLR to the two led package, or a CLR per led?

[anotherjim]

OP mentioned trying different voltages. I'm not sure that necessarily equates to different LED currents and therefore different intensity. Hmmm...

[idy]

I always had to use different LEDs for each color. And different voltage (like a dying battery) will change the hue.

[kraal]

do you have a single CLR to the two led package, or a CLR per led?

I had 1 CLR per led anode. But it appears that the CLR of the red led leg was too low (or the one used with the green led leg was too high)
Anyway thanks, the problem is solved.