Arduino Nano V3
₵80.00
The Arduino Nano V3 is a small, complete, and breadboard-friendly board based on the ATmega328P. It offers the same connectivity and specs as the popular Arduino Uno but in a much smaller form factor.
The USB Cable: Most Nanos use the Mini-USB cable (the slightly fatter one), not the Micro-USB (Android phone style)
Requires a Mini-USB cable for programming
Troubleshooting: If you cannot upload code, go to the Arduino IDE > Tools > Processor and select ‘ATmega328P (Old Bootloader)’. This fixes the upload error for most generic Nano boards.
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Key Features and Design
The Nano is prized for its size and form factor:
- Compact Size: It measures approximately 45 mm by 18mm, making it ideal for integration into small enclosures or models.
- Breadboard Friendly: Its small pins are arranged in a dual-in-line package (DIP) configuration, allowing it to be easily mounted directly onto a standard solderless breadboard for prototyping.
- Micro-USB (or Mini-USB): The original Nano used a Mini-USB port for power and programming. Newer clones and the official Arduino Nano Every and Nano 33 series often use the more modern Micro-USB or USB-C connection.6
- No DC Barrel Jack: Unlike the Uno, the Nano does not have a separate DC barrel jack for external power; power is typically supplied via USB or the VIN/3.3V/5V pins.
Technical Specifications
The specifications are very similar to the Uno, as they share the same main processor:
| Feature | Specification |
| Microcontroller (Main) | ATmega328P (or ATmega168 for older versions) |
| Operating Voltage | 5V |
| Input Voltage (Recommended) | 7V to 12V (via the VIN pin) |
| Digital I/O Pins | 14 (6 of which are PWM) |
| Analog Input Pins | 8 (A0-A7) – More than the Uno’s 6 |
| Flash Memory | 32\KB (ATmega328P) |
| SRAM | 2\ KB |
| Clock Speed | 16\MHz |
| USB Connector | Mini-B USB (Original), Micro-USB/USB-C (Newer/Clones) |
Note: The Nano includes two extra Analog Input pins (A6and A7) compared to the Uno, which can be useful in sensor-heavy projects.
Programming and Usage
Programming the Nano is identical to programming the Uno using the Arduino IDE:
- Drivers: Depending on the specific USB-to-Serial chip used (e.g., FTDI, CH340G, or ATmega16U2), you may need to install the appropriate drivers. Many clones use the CH340G chip, which requires a specific driver.
- Board Selection: In the Arduino IDE, you select “Arduino Nano” under the Tools menu.
- Processor Selection: If you have issues, you may need to try selecting the older “ATmega328P (Old Bootloader)” option, especially for some inexpensive clone boards.
The Nano is highly popular for wearables, robotics, permanent installations, and small-scale prototypes, where minimizing the project size is a priority
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