thanks for the reply/clarification..
* oh they 'are' leds.?.. (I wasnt sure as there were 2 and how it applied to my set-up/question)..
* I believe I have only seen something like I/O (input/output) before... so I wasnt clear what it meant.
question: in the schematic posted, wouldnt BOTH leds be pwm'd at the same time since there is only 1 Arduino pin in use here?
if my goal is to have each die on the RGB led star then I need to have one of these circuit designs/layouts for 'each' channel (thats what you're saying 'yes' to...correct?).. that means only one 'led' per 'circuit'...
using the schematic design above as an example... this wouldnt work (as it is) being as there is two leds on one (constant current) 'circuit' and I want to individually PWM control each color.
(sorry if some of these seem stupid or obvious..but when/while still learning., when I see slightly different things, I'm not always sure if its how I'm supposed to do things...just an 'example' but not directly transferable to my project/question..etc. so I ask to can learn from solid building blocks/facts in baby steps)
Is that a 4.7k resistor? (or 4.7M?..thats a pretty big resistor then..no?)..lol
Hopefully I can whip up a variant to my LM317 constant current approach/pcb this weekend and send out for some pcb's
Thanks for the alternate approach suggestion.. so then all (6 per group) pins would would be connected together and go to one die/color/channel?
Something to keep in mind... but I think trying to learn how to make a proper constant current driver circuit will just help me in furture projects to come as well....