THIS Driver (or THIS one, have RMM flash it with what you want… Guppydrv is cool…)
Using THIS FET from RMM
Set up like THIS thread by Djozz shows. I have the Backside (metal tab) facing up, and looking at the four legs on the FET (from the bottom with the tab up), the right three are soldered together and to ground ring, the left by itself is soldered to the 7135 point as shown in the tutorial. The negative LED lead is soldered to the Back tab on the FET as well as to the Ground ring (or other ground point)
I flashed MiniDrv on to the ATtiny13A with four levels, Moon(ish), Low, Med, and searyoureyballs direct drive pulling over 6 Amps with a purple Efest 18350…. It is bright on the searyoureyeballs level, but the calculated runtime is about six minutes, if you could hold it…
The LED’s are also from RMM as is the SPACER for the S2+. I got the XP-G2 S4 2B triple…. Happy with the tint, and the power is amazing, but I cannot wait for higher binned XP-L HI to show up again… The HOST is also from RMM… I think I like his site…
I got the Frosted narrow, medium and wide optics for it… The frosted narrow is good, the medium and wide are like having a worklight in the palm of your hand. It becomes a wall of light with either of them.
EDIT: parallel, over 2A to each LED on Direct Drive.