The goal of this project was to combine transistors, interrupts, and LEDs with the Atmel A3BU microcontroller. It’s a simple push-button Simon Says game. The user watches a developing LED sequence, and then has to repeat it correctly to move onto a more difficult sequence that’s faster with more steps! The project combines the knowledge of embedded systems with circuit and programming skills we have learned throughout the semester. The code determines the sequence of lamps to light, and reads the user input, deciding what to do next. Events are interrupt-driven: user inputs trigger an interrupt handler that makes the next move. The hardware side of the project consists of interfacing the a3bu board with arcade-style push-button lights. The output portion of the circuit must raise the voltage level for the lamps, and the input circuit must provide voltage to the board input when a button is pressed. Ultimately, a working Simon game must have both the hardware and software components working perfectly.