RGB LED Projects

Build an intelligent, adaptive ambient night light using the compact Arduino Nano V3. Read continuous light intensity from a photoresistor (LDR) on analog pin A0 and modulate an RGB LED with warm amber PWM fading as dusk falls.

Read 3-axis motion and tilt from an MPU6050 accelerometer and change an RGB LED's color based on how the sensor tilts. Learn how I2C communication and motion sensors work on the ESP32-C3.

Cycle an RGB LED through solid red, green, blue, and an animated color strobe using a single push button. Learn how multi-color LEDs mix light and how to build a clean multi-state controller with an 8-pin microcontroller.

Connect a sound sensor and an RGB LED to your Arduino. Every time the sensor detects a loud enough sound — like a clap — the LED cycles to a new color. You will learn how digital sensors produce a falling edge, why that edge needs to be caught only once, and how to prevent a single clap from registering as five.