MegCell Pulse Lets You 3D Print a Robot That Plays Guitar

A robot that actually plays guitar

A New Zealand engineer named Bruce has spent six years developing the MegCell Pulse, a 3D-printable robotic system that attaches to an acoustic guitar and plays it from digital tablature files. The device uses two mechanical arms: one presses strings between frets while the other plucks them with six individual plectrums. The result is real acoustic sound produced by physical movements, not synthesized audio.

The entire structure is built from 3D-printed parts, gears, and magnetic actuators. You feed the system a standard tab file and it handles the rest without custom programming for each song. That is a practical advantage over most musical robots, which require hand-tuned motion profiles for every piece.

Bruce ran a Kickstarter campaign to share the design. The top $100 tier gives backers the complete STL files, assembly guide, control software, and parts list. You print and build it yourself. The open approach means you can repair or upgrade any component by reprinting it, rather than replacing a proprietary unit.

The system has clear limits right now. It cannot cover the full fretboard of most guitars, and it cannot slide between frets to play legato lines or bends. Chord strumming is also harder to replicate than single-note picking. Bruce frames the Pulse as a work in progress, and those constraints are the next engineering hurdles.

The assistive mode is perhaps the most interesting feature. A player with limited mobility can use the robot to handle fretting while they handle plucking, or vice versa. That turns the Pulse from a novelty into a tool that actually expands who can play guitar.