and is fitted with a Lego “fretboard” of sorts. A slide is moved up and down the fretboard by the player. The EV3 controller detects the position of the slide via an ultrasonic sensor ...
An ultrasonic sensor reads the output value and sends the result back to a PC. One interesting problem that [Pepijn] ran into, and which he explains in great detail on his blog, is that LEGO gears ...
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