color changing and direct drive using the PC
& CFPC 1.X
"Direct drive - single color". Please note that "direct drive" reflects "a driver/regulator-less " way of powering the led. Not "direct drive" like you don't use a resistor. "always use a resistor"
(tm) (unless it's negative)
variant for a color changing saber. R1 and R2 must be calculated accordingly to the Forward Voltage (Vf) of each die. Principle can be extended to more colors / combo using the right rotary switch.
Please note that in each case, the luxeon driver remains fully functional, as well as the flickering/shimmering, ramp up/down effect, for both the direct drive and the regulated output of the PC (so you can imagine combos between a main die out of the regulator + color/shade change with the direct drive).
PEx is limited to about 2A, if you plan a heavier load, you can wire 2 PEx in parallel to double the accepted max amperage. I've also made some "doubled" PEx on a single PCB in the pastPWM access point on a PC2.x (it's the same spot on the CF, if you'd ever need a CF in direct drive)
(anotated pic courtesy of fragrax, thank you)