In this article, we will explain in detail the specifications and functions of Arduino Nano.
The Arduino Nano is an even smaller Arduino board compared to the Arduino Micoro. It can be used by inserting it directly into the breadboard.
Arduino Nano Specifications
|Tech Specs||Arduino Nano|
|Input Voltage (recommended)||+7～+12V|
|Output Voltage||+5V, +3.3V|
|Digital I/O Pins||20|
|PWM Digital I/O Pins||6|
|Analog Input Pins||8|
|Analog Output Pins
|Rated Current per Pin||40mA/Pin|
|Program Writing Pins||Mini USB Type-B
For the specifications of Arduino boards other than Arduino Nano, see the following article.
Arduino Nano Fuctions
Arduino Nano Appearance
Pin Header Placement/LED Placement
↑Click to enlarge.
The Arduino Nano Microcontroller(Microcomputer) uses “ATmega328P” from Microchip Technology(USA).
A microcontroller(microcomputer) is a very important component in controlling electronic devices that correspond to the human “brain”.
In addition, various memories such as SRAM, Flash memory, and EEPROM are also built into the microcontroller.
You can communicate between Arduino Nano and PC by connecting it to the USB port of Arduino Nano and PC with a USB cable.
You can write a program(sketch) created on your PC to Arduino Nano, and control Arduino Nano from your PC by serial communication.
It also has the role of powering the Arduino Nano via USB, as it doesn’t have a power jack like the Arduino Uno.
However, please note that the USB port is “Mini USB Type-B”, which is becoming less popular.
You can restart the Arduino Nano by pressing the reset button. Use this when you want to restart the program from the beginning or when the Arduino Nano behaves strangely.
|PWM||0 to +5V analog output
Analog output by switching between 0V and +5V at high speed
PWM and serial communication are shared with digital I/O. You can specify which one to use in the program.
10-bit A/D converter(1step change every 4.8mV)
|TX||Serial data transmission|
|RX||Serial data reception|
|SDA||Serial data transmission/reception|
|SPI||SS||Select device to control|
|MOSI||Master ⇒ Slave data transfer|
|MISO||Slave ⇒ Master data transfer|
|Vin||The voltage of “②USB Port” is output,
Power can be supplied from “Vin” without using the USB Port.
|+5V||+5V voltage output|
|+3.3V||+3.3V voltage output|
|AREF||Analog input reference voltage (0 to +5V input),
Not normally used
(Same function as “③Reset Button”)
|ON||Lights up when the Arduino Nano is powered|
|TX||Blinks when sending via serial communication|
|RX||Blinks when receiving via serial communication|
|L||Connect to digital I/O No.13|
Arduino Nano has 4 LEDs(chip parts). The “L” of LED is connected to the 13th digital I/O, and can be lighted up by setting the 13th pin to HIGH (5V) in the program.
By connecting an ICSP-compatible writer(program writing device), you can write programs(sketches) directly to the “ATmega328P”, which is an Arduino Nano microcontroller(microcomputer).
However, since you can usually write programs(sketches) via the USB port, I think that it is rarely used for writing purposes.
In addition, it can also be used as an SPI terminal.
How to get technical data for Arduino Nano
Various technical materials of Arduino Nano can be obtained from the official Arduino website.
- EAGLE FILES
- SCHEMATICS: PDF Format
First, go to the Arduino official website from the link below.
Click each icon to download the “EAGLE FILES” and “SCHEMATICS”.