/diy/ - Do It Yourself

>>1218578
>tfw no dab-core solder

>>1218620
>So if you have a constant current supply of 40mA and put two of the same model LEDs in parallel and connect them to this, is it likely that one will get significantly more current than the other
Yes, and what's more, an LED's Vf falls with rising temperature. One could eventually hog all the current and go pop.

>>1218636
>I don't really want to buy 9 MOSFETs (because they cost more than the bargain bin BC547s).
Then don't. :^) (R1-R3 just for current measurement, R5/R6 adjusts *approximate* multiplication ratio)
In any case, with the regulated supply, you might be fine with plain old resistors as current regulators.