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Course Lesson 5 of 10: Controlling RGB LED WS2812B Using Raspberry Pi Pico

Welcome to Lesson 5 of the Raspberry Pi Pico Smart Car course by Robojax, guided by Ahmad Shamshiri. This hands-on series uses the SunFounder Raspberry Pi Pico 4-Wheel Drive Smart Car Kit to teach robotics and embedded Python in a beginner-friendly format.

This lesson focuses on two major tasks: wiring the motors and controlling the WS2812B RGB LED on the expansion board. After introducing the expansion board in the previous session, you’ll now physically connect the car's four DC motors to the board and learn to manipulate colored LEDs through code.

What You’ll Learn

Ahmad walks you through the process of identifying the motor wires, determining polarity, and connecting each motor to its corresponding terminal on the motor driver board. Then, he introduces how to control the built-in WS2812B RGB LED on the expansion board using MicroPython code.

Topics covered include:

• Understanding which pins control the motors

• Identifying front-left, front-right, rear-left, and rear-right motors

• How to test for correct motor direction (forward vs. reverse)

• Using the NeoPixel library in MicroPython

• Setting custom colors on the WS2812B LED

• How to upload and run the LED control script

This lesson is critical to ensure that later programming behaves as expected, especially when sending movement commands to specific wheels or using lights for status indication.

📚 Chapter Timestamp

• [00:00] Step-by-step motor wiring guide

• [10:40] WS2812B RGB LED control demonstration

📦 Links to purchase the kit, view documentation, and download source code are available below this article.