ATTiny85 Datasheet: https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45-ATtiny85_Datasheet.pdf
Eleccelerator Fuse Bit Calculator: http://eleccelerator.com/fusecalc/
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ENTIRE PLAYLIST: https://www.youtube.com/playlist?list=PLNyfXcjhOAwOF-7S-ZoW2wuQ6Y-4hfjMR
Video #1 - Intro to Registers: https://youtu.be/tBq3sO1Z-7o
Video #2 - Access registers by address: https://youtu.be/W8REqKlGzDY
Video #3 - Barebones hardware (breadboard arduino): https://youtu.be/tfTCFBqPzcE
Video #4 - Bootloaders and Programers: https://youtu.be/dcLeKj00t_I
Video #5 - AVRDude and Fuses: https://youtu.be/Q2DakPocvfs
Video #6 - Compilers: https://youtu.be/7lcY5tcP_ow
Video #7 - Linkers: https://youtu.be/EOuNU89TdVU
Video #8 - Optimizers: https://youtu.be/ZLyesUiXde4