Computer macro pads/stream decks/auxiliary keyboards normally control computer input functions with the press of a key, making your life easier. The JC Pro Macro takes things one step further and breaks out several GPIO pins from an Arduino Pro Micro board, allowing for control of things in "real life."

In this project I hook up a small speaker for tone output, along with a small solenoid to drum out a beat. Solenoid actuation is assisted by an EZ Fan2 transistor board, which handles the higher current requirements of the device when compared to what the GPIO can supply. Proper ground and power breakout is handled by an I2C helper board fabricated by PCBWay, though I initially tried to make my own as shown in the video.

Overall, I'm quite happy with how the project turned out, and it was a lot of fun to play. Code is available on GitHub, and the JC Pro Macro, I2C Helper and EZ Fan2 boards used are available on Tindie. If the macro pad looks interesting, but you need a few more keys, an enhanced "JC Pro Macro 2" will be funding soon on Kickstarter. You can check out a preview/sign up to be notified when it's live here!