Atmel AVR LESSONS Lesson #01 - Installing AVR Studio Lesson #02 - Building the Developers Kits Lesson #03 - Intro to the Atmel AT90S2313 Lesson #04 - Making an LED blink without interrupts. Lesson #05 - Review the AVR instruction set. Lesson #06 - Review the AVR interrupts. Lesson #07 - Making an LED blink with interrupts.