Wire an External LED Safely
Add a resistor and blink an LED off the board.
Beyond the Onboard LED
The onboard light is handy, but real projects need their own LEDs. Wiring one up takes just a few parts and a little care. 🔧
LEDs Have a Direction
An LED only lets current flow one way. Its long leg is the positive anode, and the short leg is the negative cathode. Orientation matters.
All lessons in this course
- pinMode and OUTPUT
- digitalWrite HIGH & LOW
- delay() and Blink Timing
- Wire an External LED Safely