Mechanical Keyboard - Mechagodzilla Arduino Pro MIcro

Motivation:

I can't find in my country Teensy 2.0, but I have Arduino Pro Micro.

The problem with the Pro Micro is that it has only 18 pins, and you need to build matrix with this limitation. The matrix is 6 X 12, resulting in 72 keys. The wiring is as follows on the images, the layout is the same as the original.

To flash the pro micro you must do the following:

• open device manager and find the pro micro
• reset the pro micro first time (short reset + ground pins)
• see to what port it changed
• reset again and execute

avrdude.exe -p atmega32u4 -P COM3 -c avr109 -U flash:w:promicro.hex
Where my pro micro is on COM PORT 3