Arduino Nano technical notes

Arduino Nano Pin Out

Arduino Nano Technical Specifications

MicrocontrollerATmega328P – 8 bit AVR family microcontroller
Operating Voltage5v
Recommended Input Voltage for Vin pin7-12v
Analog Input Pins 6 (A0 – A5)
Digital I/O Pins14 (Out of which 6 provide PWM output)
DC Current on I/O Pins40 mA
DC Current on 3.3v Pin50 mA
Flash Memory32KB (2 KB is used for Boot loader)
SRAM2 KB
EEPROM1 KB
Frequency (Clock Speed)16 Mhz
CommunicationIIC, SPI, USART



Arduino Nano Pin Out

Arduino Nano Pin Configuration

Pin CategoryPin NameDetails
PowerVin, 3.3V, 5V, GNDVin: 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.

ResetResetResets the microcontroller
Analog PinsA0 – A7Used to measure analog voltage in the range of 0-5V
Input/Output PinsDigital Pins D0 – D13Can be used as input or output pins. 0V (low) and 5V (high)
SerialRx, TxUsed to receive and transmit TTL serial data
External Interrupts2, 3To trigger an interrupt
PWM3, 5, 6, 9, 11Provides 8-bit PWM output
SPI10 (SS), 11 (MOSI), 12 (MISO) and 13 (SCK)Used for SPI communication
Inbuilt LED13To turn on the inbuilt LED
IICA4 (SDA), A5 (SCA)Used for TWI communication
AREFAREFTo 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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NationalSemiconductorVoltageRegulatorHandbook1980

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.




RQA0009SXAQS

Download here

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