MithilR

Yes, I am powering Arduino with a source not in the diagram but you can do it with the ECS's 5V power as well.

Hey SidhanthYou can use other digital pins as well. Refer this documentation for more detail.https://www.arduino.cc/en/Reference/ServoMithil

Yes to the first paragraph of concerns/questions.If you have a receiver, then you don't need the Arduino. You can connect the ESC with the receiver instead of Arduino and use the Remote Control (a.k.a Transmitter) to control the speed.

The board can be supplied with external power from the DC power jack (7 - 12V). If the lipo battery has voltage between 7-12V you can connect it to the DC power jack on Arduino Uno or similar boards. DC power jack is the black cylinder on board with a pin in it.

You can vary the speed by the changing the value in this command.esc_signal.write(55); Vary this value between 40-130 to change the speed of motor from minimum to maximum.No extra hardware required except the ones mentioned in this instructable.

Look into interfacing the mindwave with an Arduino. From there its the same as mentioned in the tutorial.

Yes. That will work.

By color convention in electrical systems, black goes to GND, red goes to +Vcc or 5V in our case, and white would be the signal cable.

You can control 4 BLDC motors. But the clock rate of arduino is less so even if you make one it won't be stable. I would recommend you go for a different controller with a faster clock rate.

In this circuit, it will rotate at a constant speed.It rotates at the speed given in the command esc_signal.write(55);If you want to control it, you can connect a potential variable on the analog pins and map the value between 40-130 to change the speed.

Yes, both servo motor and brushless motor driver (ESC) follow the same protocol.

Or you could use this with any Radio/FChttps://www.hobbyking.com/hobbyking/store/__25888__Turnigy_TrackStar_Epic_Fail_Safe_for_Car_Boat.html

i'll go for Tech