Hey,
Iam working on a project in school where i have to control 4 brushless motors. I therefore need 4 ESC but i can not purchase a ESC and therefore has to make them by my self. Ofcause it shall be controlled by an arduino.
Anyone knows how to make one or have seen any guides?? 
http://dangerousprototypes.com/2013/10/02/a-simple-brushless-sensorless-motor-driver-for-avr-atmega/
I don't think you could do 4 on a single AVR; most quadcoptor-like things have a ESC for each motor (each with it's own ATmega8-class CPU), and the central CPU only has to provided period speed info via a servo-like protocol.
Yeah i know that i need one for each motor. Iam therefore seaching for a circuit diagram of a ESC and software for the CPU