Arduino Nano technical notes

Arduino Nano Pin Out

Arduino Nano Technical Specifications

Microcontroller ATmega328P – 8 bit AVR family microcontroller
Operating Voltage 5v
Recommended Input Voltage for Vin pin 7-12v
Analog Input Pins 6 (A0 – A5)
Digital I/O Pins 14 (Out of which 6 provide PWM output)
DC Current on I/O Pins 40 mA
DC Current on 3.3v Pin 50 mA
Flash Memory 32KB (2 KB is used for Boot loader)
Frequency (Clock Speed) 16 Mhz
Communication IIC, SPI, USART

Arduino Nano Pin Out

Arduino Nano Pin Configuration

Pin Category Pin Name Details
Power Vin, 3.3V, 5V, GND Vin: Input voltage to Arduino when using an external power source (6-12V).

5V: Regulated power supply used to power microcontroller and other components on the board.

3.3V: 3.3V supply generated by on-board voltage regulator. Maximum current draw is 50mA.

GND: Ground pins.

Reset Reset Resets the microcontroller
Analog Pins A0 – A7 Used to measure analog voltage in the range of 0-5V
Input/Output Pins Digital Pins D0 – D13 Can be used as input or output pins. 0V (low) and 5V (high)
Serial Rx, Tx Used to receive and transmit TTL serial data
External Interrupts 2, 3 To trigger an interrupt
PWM 3, 5, 6, 9, 11 Provides 8-bit PWM output
SPI 10 (SS), 11 (MOSI), 12 (MISO) and 13 (SCK) Used for SPI communication
Inbuilt LED 13 To turn on the inbuilt LED
IIC A4 (SDA), A5 (SCA) Used for TWI communication
AREF AREF To provide reference voltage for input voltage

National Semiconductor Voltage Regulator Handbook 1980

National Semiconductors Voltage Regulator Handbook

The National Semiconductor Voltage Regulator Handbook is an indispensable tool for power supply circuit design and trouble shooting tool. Reading the book will help you quickly trouble shoot power supply related problems as the designs are integrated on most power supplies circuit available on the market. Whether you are trouble shooting or designing a new project the handbook will quickly point you to the application circuit by searching for the regulator IC number used on the existing power supply for quick trouble shooting, or you can design your own by using the application circuit for reference. A must have for trouble shooters and Amateur Radio enthusiast.

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Download the PDF Document here

Baofeng UV5R RF Finals (RQA0009SXAQS)

Another RF Finals for Baofeng UV5R (RQA0009SXAQS) this is the original RF finals appearing on schematics diagram of Baofeng radio’s. However on my UV5R (two units) the RF finals is (AFT05MS004NT1) both are N-Channel Mosfet, with almost similar specification.


Download here

Please leave a message to confirm that there are different RF Finals variant attached to Baofeng radio’s.