Arduino Nano V3 Development Board Atmega168

Overview

Arduino Nano V3 Development Board featuring the ATmega168 microcontroller — the entry-level compact Nano variant with reduced flash and SRAM. Ideal for simple embedded projects, learning electronics, sensor interfacing, LED control, and basic automation where full 328P memory is not required. Fully Arduino IDE compatible in the same compact breadboard-friendly Nano form factor.

Specifications

Parameter	Value
Model	Arduino Nano V3
Microcontroller	ATmega168
Operating Voltage	5V
Input Voltage	7V – 12V (VIN pin)
Clock Speed	16MHz
Flash Memory	16KB (2KB bootloader)
SRAM	1KB
EEPROM	512B
Digital I/O Pins	14 (6 PWM)
Analog Input Pins	8 (A0–A7)
PWM Pins	6 (D3,D5,D6,D9,D10,D11)
DC Current per I/O	40mA
USB Interface	Mini-B USB
Communication	UART, SPI, I2C
Dimensions	18mm x 45mm
Weight	~7g

Pin Configuration

Interface	Pins
Digital I/O	D0 – D13
Analog Input	A0 – A7
PWM Output	D3, D5, D6, D9, D10, D11
UART	D0 (RX), D1 (TX)
SPI	D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK)
I2C	A4 (SDA), A5 (SCL)
Power	5V, 3.3V, GND, VIN

Features

• ATmega168 — lower cost entry-level MCU
• Same Nano form factor — identical pinout to 328P version
• Breadboard direct fit — 0.1 inch spacing
• 8 analog inputs — A0 to A7
• Compact 18x45mm — ultra small design
• Arduino IDE compatible — full software support
• USB powered and programmed
• Onboard LED on pin 13
• 3.3V output — power sensors directly
• Low cost — ideal for budget projects and learning

ATmega168 vs ATmega328P

Feature	ATmega168	ATmega328P
Flash Memory	16KB	32KB
SRAM	1KB	2KB
EEPROM	512B	1KB
Price	Lower	Higher
Complex sketches	Limited	Full support
Libraries	Most work	All work
Pinout	Identical	Identical

Getting Started

1. Install Arduino IDE
2. Select Tools → Board → Arduino Nano
3. Select Processor → ATmega168
4. Select correct COM port
5. Upload Blink example to test

⚠️ Notes

• Limited memory — large libraries may not fit (WiFi, display libs)
• Always select ATmega168 in processor menu — NOT 328P
• A6 and A7 analog input only
• Suitable for simple sketches — sensor reading, LED control, basic logic
• Upgrade to 328P version for complex projects with multiple libraries

Best Use Cases

• Learning Arduino basics
• Simple sensor reading (temperature, light, motion)
• LED control and PWM dimming
• Button and switch interfacing
• Serial communication projects
• Basic relay control
• Budget-friendly prototyping
• Entry-level robotics