Tech specs
| OPERATING VOLTAGE | 5V |
| INPUT VOLTAGE (RECOMMENDED) | 7-12V |
| INPUT VOLTAGE (LIMIT) | 6-20V |
| DIGITAL I/O PINS | 54 (of which 15 provide PWM output) |
| ANALOG INPUT PINS | 16 |
| DC CURRENT PER I/O PIN | 20 mA |
| DC CURRENT FOR 3.3V PIN | 50 mA |
| FLASH MEMORY | 256 KB of which 8 KB used by bootloader |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| CLOCK SPEED | 16 MHz |
| LED_BUILTIN | 13 |
| LENGTH | 101.52 mm |
| WIDTH | 53.3 mm |
| WEIGHT | 37 g |