Init0

Sure amongst our readership will Little question maintain in thoughts attaching a having fun with card to the entrance fork Of 1’s bicycle so thOn the spokes flapped The cardboard As a Outcome of the wheel rotated. It was Alleged to sound like A motorcycle, which it didn’t, However it was good, clear nice with the bonus Of making us A lot extra annoying to the neighborhood retirees than The conventional baseline, which was already pretty extreme.

[Garett Morrison]’s “Click on Wheel Organ” works on much The identical precept as a card Wiskinny the spokes, solely with far extra wheels, and with much extra musicality. The organ consists of a separate toothed wheel for every notice, all turning on A regular shaft. Each wheel is laser-reduce from skinny plywood, with a collection of nice tooth on its outer circumference. The Quantity of tooth, as calculated by a Python script, determines the pitch of the sound made when A skinny reed is pressed in the direction of the spinning wheel. As a Outcome of the ratio of tooth between the wheels is fixed, All of the notices maintain in tune relative To at least Each completely different, As prolonged As a Outcome of the velocity of the wheels retains fixed.

The proof-of-idea Wiskinny the video under reveals that velocity administration isn’t pretty there but — having fun with a number of notices On The identical time seems To enhance drag enough to sluggish the wheels down and decrease the pitch for All of the notices. There seems to be a photointerrupter on the wheel shaft To watch velocity, so we’d think about a PID loop To regulate motor velocity might assist. That and A much greater motor that gained’t …….

Source: https://hackaday.com/2022/09/25/this-found-sound-organ-was-made-with-python-and-a-laser-cutter/