YouTuber Make It And Fake It had a small problem. While she enjoys making music on occaision, she doesn’t consider herself musically talented. The natural, solution, of course was to augment her guitar with an Arduino-based auto-strum device that keeps the correct rhythm, and even frees up one’s right hand to do whatever else is needed.
The system takes the form of an Arduino Uno and USB battery pack attached to the front of a guitar. It controls a servo motor, which uses what appears to be a pair of chopsticks with a pick attached to strum the strings. A 3D-printed control box contains three small buttons as well as a trio of LEDs to form the simple user interface.
Code for the project can be found on GitHub. As seen at 1:10 in the video below, it can not only strum at a monotonous pace, but can also be programmed to do a more complex rhythm as needed. While you might wonder why you would want this type of device, Make It And Fake It demonstrates several scenarios such as drinking tea, texting, or even playing another instrument. One possible disadvantage is that the servo is somewhat loud, however, in the right scenario this could serve as a secondary robotic percussion instrument.