How To Control a Servo

How To Control a Servo - How To Control a Servo. What is a...

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How To Control a Servo. .. What is a Servo? A servo is a small device that has a rotating output shaft. This shaft can be positioned to specific angular positions by sending the servo a coded signal. As long as the coded signal exists on the input line, the servo will maintain the angular position of the shaft. As the coded signal changes, the angular position of the shaft changes. In practice, servos are used in radio controlled airplanes to position control surfaces like the elevators and rudders. They are also used in radio controlled cars, puppets, and of course, robots. Servo Control Basics The servo is controlled by a simple digital pulse. Most of the time, the signal is at a logic low (0 V). About every 20-40 ms (ms = 1/1000th of a second), it goes logic high (3 to 6 VDC) and then quickly back low again. This tiny window of logic high time, called the pulse width, gets the attention of the servo.
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This document was uploaded on 02/08/2012.

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How To Control a Servo - How To Control a Servo. What is a...

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