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–The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x).
–The Arduino Nano can be powered via the Mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.
–The ATmega328 has 32 KB, (also with 2 KB used for the bootloader). The ATmega328 has 2 KB of SRAM and 1 KB of EEPROM.
Microcontroller：Atmel ATmega168 or ATmega328
Operating Voltage (logic level)：5 V
Input Voltage (recommended)：7-12 V
Input Voltage (limits)：6-20 V
Digital I/O Pins：14 (of which 6 provide PWM output)
Analog Input Pins： 8
DC Current per I/O Pin：40 mA
Flash Memory：16 KB (ATmega168) or 32 KB (ATmega328) of which 2 KB used by bootloader
SRAM： 1 KB (ATmega168) or 2 KB (ATmega328)
EEPROM：512 bytes (ATmega168) or 1 KB (ATmega328)
Clock Speed：16 MHz
Dimensions：0.73″ x 1.70″
Length： 45 mm
Width： 18 mm
Weigth： 5 g
The Mini USB Nano Board for Arduino Cannot Be Recognized by Computer.
Step 1. Connect the board with your computer, Right-click my computer –> manager
Step 2: Click the device manager – check the port if Ardunio Nano (COM)with yellow warm sign. It means that you need to install the diver on your computer.Then you could find
For Windows: CH340G.rar driver
For Mac:CH341SER_MAC.ZIP driver
If have install the driver successfully. You would see the Ardunio Nano (COM).Then the warm sign will disappearred.
Step 3. If you still can not find the nano board,You need to check if you board is on good condition.
Connect the board with your computer, right-click your computer -> manager -> device manager – >Universal Serial Bus controllers（USB）.If you see the prompt of Unknow USB Device (the device descriptor request failed) , it means the board is defective.
Related articles: How to burn bootloarder in arduino nano?
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