Sensored ESC
Schematic ATMega328p-PU schematic
This is the scheamtic made with ATMega328p PU chip directly on the PCB with a 16MHz crystal oscillator and all the components. Have in mind the schematic of the brushless motor with the OPAMPs. So the "SensorA , B and C" are already amplified to 5V.
Also check the part list here if you want to buy all teh components.