The parts are the same as for all TA 2S drivers
MCU Attiny85 for Narsil
Use 1% resistors all around
R1 : 19.1 k (220 k for e-switch lights, 360k for 2S setups like the L6 driver)
R2 : 4.7 k (47 k for e-switch lights)
R3 : 100 k
R4 : 47 ohm
R5 : 4.7 ohm
R6 : 0 ohm jumper, or can use a solder blob (LDO drivers only)
R7 : 0 ohm jumper, or can use a solder blob (LDO drivers only)
BR : Bleeder resistor for lighted tailcaps, varies between 470-630ohm (optional)
C1 : 10 uF (be sure it is rated for the voltage you plan to use, so for a 4S setup, it needs to be 20v or more)
C2 : 0.1 uF (10uf for LDO drivers, can use the same one as the C1)
OTC : 1 uF (functions as e-switch pads for e-switch lights)
U1 : SOIC-8 footprint Attiny25 for bistro, the 20mm+ versions have pads for the Attiny85, the 25 & 45 also fit on them
U2 : LFPAK56 MOSFET (aka, “FET”). PSMN3R0-30YLDX is a popular cheap option, the SIR800DP is better but costs more.
D1 : Schottky Diode SOD-323 (if using a zener and 2S cells then you will need a 200 ohm resistor here instead)
Z: Zener diode (link is external) SOD-323 (Optional, only needed for 2S+ operation)
LDO : Designed around the MIC5235-5.0YM5 LDO voltage regulator
7135 : Standard 350ma or 380ma 7135’s can be installed on these pads. I prefer 350ma myself. You will need to clip the center pin of the top side 7135 if you plan to use a bleeder resistor. The 7135’s can be purchased from RMM or FastTech