Page 141 - KEC Khaitan C8.2 Flipbook
P. 141
Going Beyond Basics: Using a NeoPixel LED Strip
If you’d like more vibrant or dynamic color displays, consider a NeoPixel LED strip (WS2812B).
These individually addressable LEDs allow animations, smooth transitions, and complex color
patterns—all controlled by a single Arduino data pin.
Why NeoPixels?
Dynamic Effects: For instance, fade in/out or create “sparkles” corresponding to different
expressions.
Scalability: Add more LEDs without increasing complexity—just ensure enough power.
Impressive: A wave of changing colors can more strongly convey the “mood” than a single LED.
Considerations:
Power Supply: Larger strips at full brightness can draw significant current. Use an appropriate
5V supply and common ground.
Heat Management: Lots of LEDs at high brightness can produce heat.
Programming: More advanced animation logic can be used to truly enhance the user
experience.
Testing RGB LED Functionality
Write a basic Arduino program to turn LEDs ON/OFF.
Ensure the LED strip lights up properly.
Coding the Mood Lamp using AI Blocks for Emotion Recognition
You will use AI blocks to:
Detect facial emotions.
Send commands to Arduino to control LED colors.
Hands-On Project 139

