Arduino & AVR

The AVR family runs entirely in your browser — instant start, no cloud round-trip — with cycle-accurate AVR emulation.

Board	MCU	Flash	Notes
Arduino UNO	ATmega328P, 16 MHz	32 KB	The default beginner board; 14 digital + 6 analog pins
Arduino Nano	ATmega328P, 16 MHz	32 KB	Same chip as the UNO in a breadboard-friendly stick
Arduino Mega 2560	ATmega2560, 16 MHz	256 KB	54 digital I/O, 4 UARTs — for pin-hungry projects
ATtiny85	ATtiny85, 8 MHz	8 KB	The bare 8-pin DIP chip, breadboard it directly

Language: Arduino C++.

Details that behave like hardware

• analogWrite PWM, timers, interrupts (attachInterrupt), EEPROM and Serial at any baud rate work as on silicon.
• The ADC reads whatever the analog circuit provides — wire a potentiometer divider and analogRead tracks it.
• Classic shields’ worth of parts (LCDs, 74HC595s, servos, matrix keypads) are in the catalog with examples.

Good starting examples

The gallery’s Arduino Uno filter lists dozens — binary counters, OLED displays, steppers with A4988 drivers, battery monitors. See the examples gallery.

Board art and pinouts

Each board’s canvas art and full pin map, generated from the simulator:

Arduino UNO · Arduino Nano · Arduino Mega 2560 · ATtiny85