They are roughly the size of a soccer ball and utilize CO2 thrusters and ultrasonic sensors to ... shelf platforms such as Arduino and LEGO Mindstorms EV3, which makes for an easy transition ...
The heart of the build is a Lego Mindstorms EV3 controller ... The EV3 controller detects the position of the slide via an ultrasonic sensor, and uses this to determine the fret the user is ...
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