3.31 Joystick Control Servo

3.31.1 Overview

We control the servo via the axis X of the joystick. This model is widely applied to mechanical ON/OFF of lights and doors.

3.31.2 Test Code

3.31.2.1 Code Flow

3.31.2.2 Build Code

There are two ways to upload the code: directly open the code file we provide; or manually build blocks.

Directly open the code file we provide:

1. Click and choose Load from your computer

2. We have already downloaded the codes on computer desktop, so open the file and choose 3-31-remoteControlServo.sb3

Manually build blocks:

1. Build the two basic blocks:

2. Declare a variable angle and assign the x value of joystick to angle.

3. Add a to determine whether angle > 3500. If yes, servo rotates to 0 degree.

4. Add a to determine whether angle < 500. If yes, servo rotates to 180 degree.

Complete Test Code

3.31.2.3 Test Result

After uploading code, push the joystick to the left and the servo rotates to 180 degree. Push it to the right and the servo rotates to 0 degree.