Getting Started
Pins, power, breadboards, LEDs and resistors: the groundwork every project needs.
- Uno Pin Map and Electrical Limits
Every header pin on the Uno R3, what it can do, and the current limits that keep the board alive.BeginnerArduino Uno - Your First Sketch: Blink
Upload a sketch that blinks the on-board LED and learn what setup() and loop() do.BeginnerLEDArduino Uno - How a Breadboard Is Connected
Which holes are joined inside a solderless breadboard, and the wiring mistakes that come from guessing.BeginnerBreadboard - Lighting an External LED
Wire an LED with a resistor, get its polarity right, and blink it from a digital pin.BeginnerLEDResistorBreadboard - Choosing a Current-Limiting Resistor
Calculate the resistor an LED or display segment needs, with a calculator and worked examples.BeginnerResistorLEDSeven-segment - Using Analog Pins as Digital Outputs
Why A0–A5 can supply power to a potentiometer, as the workshop projects do, and where the trick stops working.BeginnerPotentiometerSerial