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Chapter 15 Servo
Component knowledge
Servo
Servo is an auto-control system, consisting of DC motor, reduction gear, sensor and control circuit. Usually,
it can rotate in the range of 180 degrees. Servo can output larger torque and is widely used in model airplane,
robot and so on. It has three lines, including two for electric power line positive (2-VCC, red), negative (3-
GND, brown), and the signal line (1-Signal, orange).
We use 50Hz PWM signal with a duty cycle in a certain range to drive the servo. The lasting time 0.5ms-2.5ms
of PWM single cycle high level corresponds to the servo angle 0 degrees - 180 degree linearly. Part of the
corresponding values are as follows:
High level time
Servo angle
0.5ms
0 degree
1ms
45 degree
1.5ms
90 degree
2ms
135 degree
2.5ms
180 degree
When you change the servo signal, servo will rotate to the designated position.
Summary of Contents for Ultimate Starter Kit
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Page 117: ...117 Chapter 9 Potentiometer RGBLED www freenove com support freenove com Hardware connection ...
Page 155: ...155 Chapter 14 Relay Motor www freenove com support freenove com Hardware connection OFF 3 3V ...
Page 173: ...173 Chapter 16 Stepping Motor www freenove com support freenove com Hardware connection ...
Page 239: ...239 Chapter 22 Matrix Keypad www freenove com support freenove com Circuit Schematic diagram ...
Page 240: ...Chapter 22 Matrix Keypad 240 www freenove com support freenove com Hardware connection ...