I am trying to do a constant current circuit for my car. The outline is as follows:

7 x 3.2v White LEDs driven off the sidelights
6 x 2.1v Yellow LEDs driven off the indicators
9 x 2.1v Yellow LEDs fed with 1mA with sidelights, but at 25mA with the indicators.

I can build constant current circuits for the 7 white and 6 yellow LEDs, but I'm not sure how to do the 9 yellow LEDs that have multiple currents from 2 sources.

Can anyone help?

 

Hello,

We do not allow changes in the lights of a car:
Automotive Guidelines

Bertus