Texas Avenger "TA" Driver series - Triple channel + Bistro or Narsil + Clicky or E-switch - The Ultimate open source driver!

Flashlight Modding and DIY Parts
905

No. You want the 841 MU with the QFN 20 package: Search results for: ATTINY841-MU 8-bit Microcontrollers - MCU – Mouser
Same package as the 84A MU I used in this driver: What did you mod today? - #2576 by Mike_C