Alright, so I made a custom set of the BMW Angel Eye lights for my sports car, and am now trying to wire them properly. The setup that I'm trying to do, is so that I can turn on the inner and outer rings separately, but then also turn them both on simultaneously. I'm hoping to do this without wiring a second switch, but not fully sure that it's possible. Below is a picture of the setup.
The solution has to do with what kind of switch you can obtain. You basically need a four detent switch which could be wired to provide: Nothing, Inner, Outer, Inner & Outer. I have never seen an automotive style pull-switch with four detents. A three detent switch would could be wired to provide: Nothing, One, Both; where One could be either Inner or Outer.
each ring has 2 led's, so each line will have 2 leds and 2 resistors attached to it. I'm curious as to what type of a switch I need so I can set it up for Nothing, Outer lights, Inner lights, Both lights.
If you do two LED's in series you can use a small current limit resistor disipating less heat and generally wasting less power. At 12 V DC you'll be burning 300mw's in the resistors. If I'm not mistake the resistor value for two 3.5 LED in series at ~20ma is 160ohms and it would only dissipate 100mw's