STEPPER LESLIE

the idea was to make a speed controlled leslie speaker. It is something i have attempted before in the GAMEBOY MEGAMACHINE (check project page on that) with the stereo leslie speakers in the base case of the gameboy megamachine. But i always thought they were quite slow to respond. i decided to try it with a stepper motor. a quiet running NEMA 17 stepper motor. which means you can ramp up in speed and also stop almost immediately. which means it can be used like either a voltage controlled effect module or via midi.

I use TMC 2209 stepper motor drivers which are very silent running. also if you want them to have more grunt than you can send them! just stack them up in paralell!! i power them with 18volts and this can drive the baffles and horns!

for the modulation pedal i repurposed a volume pedal and installed an arduino. here is the full video of building it https://www.patreon.com/posts/how-to-make-midi-127316408

but the code is here MODULATION FOOT PEDAL CODE.

The code for both of the arduonos driving the stepper motors are largely the same! they only require an arduino midi input (search up arduino midi in schematic) and wire the TMC2019 to the stepper pin on digital pin 9 of the arduino. hopefully that makes sense. as its that simple to not require a schematic. wire the speed knob to analog pin 0.

the code for this is here LESLIE BAFFLE MIDI INPUT AND VOLTAGE INPUT STEPPER MOTOR CODE

For the rest of the info check these videos.

in part 1 i build the horn assembly PART 1 :-

 in part 2 i add voltage input and make the baffle assembly :-