I'm making a record player for a school project and I'm having trouble with the motor that will spin the platter. I'm using a belt drive system, so I have two circles connected by a pulley system. Using the velocity ratio and pulley formula (knowing that the platter had to have a diameter of 100mm and spin at 33.3 RPM, and the motor spindle would be 5.55mm diameter) I worked out that the motor would have to spin at exactly 600 RPM.
I have no knowledge in electronics so any help would be massively appreciated. Could you please suggest a way I could buy a motor online and a way to control the motor so that I could get it to spin at exactly 600RPM? I've been looking at motors like these and adjustable motor speed controllers like these but I am unsure what motors would have the right voltage and amps, and whether the variable controllers would be compatible with them?
If anyone could suggest a combination of motor, and an adjustable motor speed controller and possibly even a way to put them together I would be so grateful. This is for a school project to finish.