Hi

i have an RGB LED bur when it shuld be white it is Light Pink,
each colour are running on a MOSFET.

So i need a circuit that read out the value of what going in to my LED Colours
And when all the colour are om "MAX" i want a fourth White LED to go ON

Hope some one can help me.

 

do you have a RGB led and it's not giving you the correct colours ,or do you need to know how to drive it?

 

i have 3 LEDs (One Red, One Green, One Blue), and a controller that runs MOSFETs
i need a circuit that turn ON a fourth LED (One White) if all af others LEDs MOSFET are ON ther highest power.

 

ideally you need the circuit of the mosfets, but if you don't have it,you'll need a three input comparator circuit,to put the fouth led on.