What is ESC?

 What is ESC? Electronic Speed Control Controller Robot Servo
Electronic Speed Controller

     Speed controllers, or ESC's, as many people (notably Americans) tend to call them, are a key part of a robot, in the most basic sense, they sit between the radio receiver (Rx) and the motors and batteries, telling the motors when to turn on and off, and which direction to go in.

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 What is ESC? Electronic Speed Control Controller Robot Servo