MU 2301, A25

Chris Jamieson, Tyler Lash, Mohan Sampathkumar, and Seth Warren

The SoleTar is a guitar inspired instrument consisting of a single plucked and fretted string. A string is tensioned between two 3d printed bridges mounted to a wooden 2 by 4, with help from a guitar tensioner. A stepper motor is mounted to the bridges in order to pluck / strum the string. Between the two bridges are two rods that serve as rails, on which are 6 3d printed fretting carriages, each of which uses a solenoid to fret the string. The rail system allows for the 6 solenoids to fret any note we want, with the restriction that only 6 notes may be used per musical piece. The bridges are wired to one end of the rails, which contains and Arduino Uno and breadboard responsible for controlling all of the electronics. This robot is meant to be assistive, as the limited note selection make it impractical for full individual songs.

Bill of Materials
> Solenoids x6 | $30 (Pack of 9)
> 3d Printed Bridges & Fretters | ~$20
> Guitar String | ~$8
> Guitar Tuning Peg | $10 (Pack of 6)
> Wood 2″ x 4″ x 4′ | $3
> Steel Rod x2 | $10
> Arduino / Microcontroller | $30
> Mosfet x6 | $6
> Stepper Motor | $9 (Pack of 3)
> Breadboard | $7 (Pack of 6)
> Power Supplies (5v and 12v) | $20
> Wiring | $5

onshape CAD Link: https://cad.onshape.com/documents/5e904809c1cecbf92ae97454/w/12db4e6569520b424f42e0f4/e/aa376d982a3e00eb1088d139?renderMode=0&uiState=68e990c975bbb3186ddcc481