Basic Information of Arduino Uno ATmega328P microcontroller
- 1. Arduino Uno Prepared by- Rupesh Ingle
- 2. What is Arduino Uno? • Open-source microcontroller board based on ATmega328P. • Used in embedded systems, IoT, and automation projects. • ‘Uno’ means ‘one’ in Italian — first official Arduino board.
- 4. Technical Specifications • Microcontroller: ATmega328P • Operating Voltage: 5V | Input Voltage: 7–12V • 14 Digital I/O Pins (6 PWM), 6 Analog Inputs (A0–A5) • Flash: 32 KB | SRAM: 2 KB | EEPROM: 1 KB • Clock Speed: 16 MHz | USB Type-B Port
- 5. Features & Memory • Reads digital (HIGH/LOW) and analog (0-1023) signals. • Works with sensors, motors, displays, etc. • Memory Types: • - Flash: Stores code (32 KB) • - SRAM: Runtime variables (2 KB) • - EEPROM: Permanent small data (1 KB)
- 6. Programming & Tools • Language: Based on C/C++ • IDE: Arduino IDE (Offline) | Arduino Web Editor (Online) • Simulators: Tinkercad Circuits | Wokwi • Online Resources: arduino.cc | tinkercad.com | wokwi.com
- 7. Arduino Code Structure • setup(): Runs once at the beginning. • loop(): Repeats infinitely. • Example: Blink LED using pin 13 with delay.
- 8. Applications & Projects • LED Patterns | Motion Sensors | Line Follower Robots • LCD Displays | Temperature Sensing | Smart Bins • Home Automation using Relays and Sensors
- 9. Powering Arduino Uno • Via USB (during programming) • Barrel Jack (7–12V DC adapter) • Vin Pin (with external power supply)
- 10. Important Pins & Safety • PWM Pins: 3, 5, 6, 9, 10, 11 • Analog Pins: A0–A5 | Digital Pins: 0–13 • GND: Connect for common ground • 5V Pin: For output power | Vin: For supply input • Never draw >20 mA from I/O pin • Use resistors with LEDs and proper grounding
- 11. Libraries and Examples • Use Arduino IDE’s Library Manager for sensors, LCDs, etc. • Check File > Examples in IDE for demo projects. • Explore community libraries for advanced projects.