Looking for some consultation on a project: I am looking for DC motors that will be spinning acrylic discs, 12" in diameter, 1/8" thickness. I am clueless as to what range of power/torque/RPM would be best. They don't need to spin super-fast, no more than 150 RPM I think.
If context helps, they will be used in manual-projection system: the discs have patterned cutouts, and I will be casting light through them to create interesting shadows. I want to control speed and direction of the motors. I am hoping to have 4 of these discs spinning, hopefully off of the same arduino.
I am hoping to make my own circuit (H-Bridge, whatever. I was told I can just PWM the gate of a mosfet.... is that correct?) rather than buy a driver, but if I can use motors that are strong enough to move the disc and are compatible with some of the pre-made drivers out there, I might go for that.