| Microcontroller | ATmega328P |
| Operating Voltage | 5V |
| Input Voltage (USB) | 5V |
| Input Voltage (VIN, via RAW pin) | 7–12V |
Digital I/O Pins
• 22 total pins
o 14 digital I/O pins
o 8 analog inputs (A0–A7)
PWM Pins
• 6 (D3, D5, D6, D9, D10, D11)
Analog Input Pins
• 8
DC Current per I/O Pin
• 20 mA
Flash Memory
• 32 KB (2 KB used by bootloader)
SRAM
• 2 KB
EEPROM
• 1 KB
Clock Speed
• 16 MHz
USB Chip
• FT232RL (older boards) or CH340 (newer clones)
Dimensions
• 45 mm × 18 mm
Weight
• ~7 g



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