Simon Mini Game

This is a mini version of my Simon Memory Game (https://www.thingiverse.com/thing:2770538). It is made possible by incorporating a 1210 white LED inside each button cap.

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Demo
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https://youtu.be/a7s4ng__J9o

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Hardware
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I designed a custom PC board (Eagle files included) to hold a 2 digit display, MAX7219 Matrix driver IC, an Arduino Mini Pro, a buzzer and the switches with the button tops that each incorporate a led. The MAX7219, Arduino and some passive SMD components are mounted on the back of the board. The Display, Switches with LEDs and Buzzer are mounted on the front of the board. I made my board using the toner method.

The case holds a small on/off switch (13mm x 8mm rocker switch) and a standard 9V battery.

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Software
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For the sound, I used the software I wrote for the Arduino Piano (https://www.thingiverse.co