Free Arduino Mega 2560 Simulator — 54 Pins in the Browser
FREE BROWSER SIMULATOR · NO ACCOUNT
Free Arduino Mega 2560 Simulator — 54 Pins in the Browser
Run Arduino Mega 2560 sketches in the browser when the Uno runs out of pins: the ATmega2560 brings 54 digital I/O, 16 analog inputs, four hardware serial ports and 256 KB of flash. LED chases across many pins, multi-serial control and motor drivers — the projects that made the Mega the workhorse board.
What you get
- 54 digital pins — LED arrays and multi-channel control without port expanders
- 16 analog inputs — a sensor hub's worth of ADC channels
- Four hardware serial ports — multi-device UART without SoftwareSerial
- 256 KB flash — room for large sketches the Uno cannot hold
- Same real compilation — arduino:avr:mega core via arduino-cli
Supported targets
| Arduino Mega 2560 | arduino:avr:mega |
|---|---|
| Digital I/O | 54 pins |
| Analog inputs | 16 channels |
| Hardware serial | 4 ports |
| Flash | 256 KB |
Try these examples
Mega BlinkRead the write-up →
Mega LED ChaseRead the write-up →
Mega Multi-LEDRead the write-up →
Mega SerialRead the write-up →
Mega Serial ControlRead the write-up →
L293D Motor ControlRead the write-up →
Mega LED ChaseRead the write-up →
Mega Multi-LEDRead the write-up →
Mega SerialRead the write-up →
Mega Serial ControlRead the write-up →
L293D Motor ControlRead the write-up →
FAQ
When should I choose a Mega over an Uno?
When the pin count or flash is the limit: LED arrays, multi-sensor hubs, four UART devices at once. The Mega costs more and is physically bigger; the simulator lets you try the same sketch on both before buying either.
Do the extra serial ports work in the simulator?
Yes — the Mega's four USARTs are modeled, and the serial examples drive them with the standard Serial/Serial1/Serial2/Serial3 API. The multi-serial example shows the pattern.