There’s the world’s first bionic drummer, and then this functional LEGO drum machine. An engineer who goes by ‘Brick Technology’ built this device using LEGO Technic pieces that form a music box-like drum sporting moveable pins that pluck levers. When these spring-loaded levers are plucked, it taps piezoelectric discs wired to a Roland sound module from an electronic drum kit.
The beauty of using LEGO Technic is the ability to quickly swap out pieces, which came in handy when trying to get all eleven hammer mechanisms working seamlessly together. A belt design was then implemented to overcome the limited pin space on the drum, while increasing the length and variation of the rhythms. An electronic motor and gearbox ratios let you adjust tempo.
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