Arduino controllers come in different sizes and capabilities. Uno is common for beginners, Nano is compact, Mega has many pins, and ESP-style boards add Wi-Fi or Bluetooth.
Concept illustration. Check the component datasheet before wiring.
Try it yourself
Change an input. See what follows.
A simplified learning model. Values describe the model, not a connected robot.
Working Principle
Arduino controllers come in different sizes and capabilities. Uno is common for beginners, Nano is compact, Mega has many pins, and ESP-style boards add Wi-Fi or Bluetooth.
Step by Step
Choose board size.
Check input/output pin count.
Check voltage and memory.
Match the board to the project.
Concept illustration; component appearance and scale are simplified.
Practical learning notes
Key idea
Arduino boards differ in voltage, pin count, memory, and communication features. Code may need pin changes between boards.
Use in robot
Nano is compact for a small chassis. Uno is easier on a desk. Mega is useful when many pins are needed.
Safe wiring
Check whether a controller is 5V or 3.3V before connecting modules.
Classroom check
Compare Nano, Uno, Mega, and ESP32 by voltage, pins, USB type, and wireless ability.
robodatech.