Lesson 9 – Building the DIY UNO (Part 3): Testing & Programming Your Custom Board
Welcome to the final step of your DIY Arduino-compatible UNO board project! In this lesson, we’ll walk through the multimeter verification, programming setup, and your first successful code upload to the ATmega328P microcontroller on your hand-built board. This is where your circuit becomes a functioning device—blinking LEDs and all.