Hello everyone!

I dabbled in RC cars a couple decades ago. Now I dabble in making bizzare musical instruments. The instrument I am working on now will require a Brushless DC motor just like an RC car. What I need it to do is actually pretty simple so it should be possible to do it with already well-engineered RC car parts. Its not radio controlled or battery powered. The BDCM speed is simply controlled by a single 0-5V continuous control pedal.

Here's what I need to know:

1. Do ESCs require battery control or is it possible to power them with an AC-DC transformer? Is there anything I should watch out for?

2. What is the best way to control a BDCM with a 0-5V controller pedal? What control signal does an ESC expect?

3. The motor needs to have pretty high torque at low speed. Any suggestions for a motor? I dont want to use a stepper.

Thanks,
Clark