#01beginner
First Light
Blink an LED on and off: your first embedded circuit
Watch the circuit build itself: components drop in, wires connect, and the output comes alive.
Components
Everything you need for this project.
1x Red LED (5mm)
1x 220Ω resistor
2x jumper wires
How It Works
Understand current flow, LED polarity, and the purpose of a current-limiting resistor. Introduction to digital output (HIGH/LOW).
InputDigital Pin D1
ProcessingESP32-S3 toggles pin HIGH/LOW every 1 second
OutputRed LED blinks on/off
What You Build
A single LED connected from pin D1 through a 220Ω resistor to GND: the simplest possible circuit.
African Context
Understanding how a single LED works is the foundation for all indicator lights, from phone charging indicators to solar lantern status lights found across the continent.
What You'll See
LED blinks on/off at a 1-second interval. Display shows a real-time indicator synchronized with the LED state.