The motor I chose has a hefty weight and can only change speed so fast, especially because it has a large off-center mass attached to it creating quite a bit of rotational inertia. It obviously will never reproduce the exact motion you "record" but it does at least output a random pattern of buzzing, which in itself is cool.
Some ideas for improvements:
- bank of motors ranging in size, the large ones would be able to capture lower frequencies, smaller would capture higher frequencies.
- weighted solenoid for "jolts" not attainable with rotary motors
- instead of just changing motor voltage, write code to slam the motor on then reverse voltage and stop it as quickly as possible. This would give more of a "thump" feel.
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