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Getting started

What you need

  • Arduino Uno or compatible 5 V AVR board
  • data-capable USB cable
  • breadboard and jumper wires
  • 220–330 Ω resistor for each LED
  • components listed in the selected lesson
  • Arduino IDE 2 or Arduino CLI

Exercises C–F also require an appropriate motor driver, protected motor supply, and a multimeter. Do not begin those exercises until you understand the hardware safety rules.

First upload

  1. Install Arduino IDE from the official Arduino website.
  2. Connect the Uno and select Tools > Board > Arduino Uno.
  3. Select the board's port.
  4. Open the .ino file inside its matching folder.
  5. Click Verify, then Upload.
  6. Open Serial Monitor, choose 9600 baud, and use No line ending.

Test the USB serial command path before connecting a Bluetooth module. This keeps software, wiring, and wireless troubleshooting separate.

Breadboard habits

  • Disconnect USB and external power before changing wiring.
  • Check LED polarity and always use a series resistor.
  • Use one ground reference across the Arduino, driver, and external supply.
  • Keep a written pin map beside the circuit.
  • Measure the supply before connecting the board.
  • Upload a motor-stop sketch before attaching motor power.

Evidence for each lesson

Record the board/core version, a wiring photo or diagram, commands tested, observed serial output, and any changes made. A successful compile is not proof that a physical circuit is safe or correct.