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UNO power in a breadboard-friendly 45 × 18 mm board, with headers already soldered and a USB cable included.
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The Nano V3 has the same ATmega328P and 16 MHz clock as the UNO, so the same code runs unchanged — but it plugs straight into a breadboard and fits inside small enclosures. It adds two extra analog inputs and comes with headers pre-soldered, so you can start wiring immediately.
| Microcontroller | ATmega328P, 16 MHz |
|---|---|
| Memory | 32 KB flash, 2 KB SRAM, 1 KB EEPROM |
| I/O | 14 digital (6 PWM), 8 analog inputs |
| USB | CH340G, Mini-USB |
| Input voltage | 7–12 V on VIN, or 5 V USB |
| Dimensions | 45 × 18 mm |