Arduino Nano Original A000005
1 What It Is
The Original Arduino Nano A000005 is a small, complete open-source development board similar in capability to the classic Arduino Uno but in a much smaller footprint that fits easily into breadboards and compact circuits.
It runs on the ATmega328P microcontroller the same brain used in Arduino Uno classic boards.
Works with the Arduino IDE for easy programming.
Ideal for compact prototypes, wearables, robots, sensor nodes, and space-limited designs.
2 Power & USB
Mini-USB port for programming and power, replacing the larger DC jack found on other Arduino boards.
Automatically selects the highest available power source (UStage recommended: 712 V if powering externally via VIN pins.
5 V regulated logic for sensors and modules.
3 I/O Pins & Interfaces
Type | Quantity | Key Details |
Digital I/O | 14 | Can act as inputs or outputs |
PWM Pins | 6 | For motor speed, LED dimming |
Analog Inputs | 8 | 10-bit ADC for sensors |
Communication | UART, SPI, I2C | Serial, peripheral interfaces |
These pins give you flexibility for sensors, actuators, communication, and more all in a tiny board.
4 Memory & Performance
Feature | Specs |
Clock Sp | 32 KB (2 KB for bootloader) |
SRAM | 2 KB |
EEPROM | 1 KB |
Compact but capable enough for a variety of embedded applications from blinking LEDs to small robotic controls.
5 Why It's Useful
Tiny & breadboard-friendly fits standard prototyping boards. Arduino IDE support simple to code and upload sketches. Perfect for education, DIY, and wearable tech great learning tool. Low-power operation ideal for battery projects.
6 Common Projects
Temperature & humidity sensor nodes LED animations & displays systems
The small size makes it ideal when space is tight or when building compact custom electronics.
7 Quick Comparison: Nano vs Uno
Feature | Nano A000005 | Arduino Uno |
Size | Very Small | Larger |
USB Type | Mini-B | USB-B |
Power Connector | Mini USB only | USB + DC jack |
Breadboard Friendly | ||
MCU | Same (ATmega328P) | Same |
I/O | Same counts | Same counts |
Nano packs same power in a much smaller space.
8 Getting Started (Basic Steps)
Install the Arduino IDE on your computer.
Connect the
Select Arduino Nano (ATmega328P) in Board Manager.
Write a simple sketch (e.g., Blink).
Upload your first microcontroller project is ready!
Summary
The Original Arduino Nano (A000005) is a compact, breadboard-ready microcontroller board based on the ATmega328P perfect for prototyping, learning, and space-constrained electronics. It offers most of the power of a full-size Arduino in a tiny footprint and is supported by the vast Ar