I'm learning Arduino in order to build a specific device, which includes 4 fans to circulate air. I thought I'd use old PC fans, and replaced the motor in project 10 of the Arduino starter kit with a PC fan.
Project 10 uses an H bridge L293D to control a DC motor with a pot and 2 buttons; one to switch on/off and one to change motor direction. Pot is speed.
First thing I learned was that there are brushed and brushless motors :). But, it worked, which was great, but in my research this morning I've come across all sorts references that you absolutely must use an ESC to control a brushless motor. I'm perfectly happy to buy one but don't know which one to buy :)
Can anyone shed a little light please on what the equation is I'd use to judge what sort of wattage ESC to buy? Also, how come a brushed motor will rotate both ways but my brushless one would only go one way round? Is this related to using the wrong code and I should be using servo code to control a brushless motor?
Many thanks for your time