I am researching about how to make a quadcopter. When reading documents about this, I find there are some questions I want to ask
-This tutorial : http://www.instructables.com/id/Quadrotor/?ALLSTEPS , in parts list section, it said we need an ESC
“- 4 of Turnigy Plush 18 amp speed controller”
In my country, an ESC is not cheap, and I also want to make a quadcopter with smallest cost I can. So can I replace ESC by an other alternative part ( such as a arduino shield, or engine controlling board of arduino, or same ) that has cheaper cost ?
thanks for reading and I am waiting solution from others