The Arduino NANO pins, similar to the UNO, is divided into digital pins, analog pins and power pins. The NANO has two more analog pins, however. There are pins with secondary functions on the table below. These secondary pins are mostly communications pins such as I2C and SPI.
Last year I found some awesome Arduino pinout diagrams with full colour on the Arduino forums. They are all titled something like The Unofficial Arduino Pinout Diagram / The Definitive Arduino Pinout Diagram, etc. They disappeared from the Internet (pighixxx.com) in December 2013. With the help of the Internet Archive’s Wayback Machine I retrieved them. Fortunately they were distributed under a CC-BY-ND license, so here they are again in PDF’s for your download delectation.
Arduino - Rotary Potentiometer. Arduino's pin A0 to A5 can work as analog input. The analog input pin converts the voltage (between 0v and VCC) into integer values (between 0 and 1023), called ADC value or analog value. By connecting an output pin of the potentiometer to an analog input pin, we can read the analog value from the pin, and then converts it to a meaningful value. Title: nanoch340schematics rev1.jpg Author: marpi Created Date: 11:26:35 AM. Input and Output Each of the 14 digital pins on the Arduino Uno can be used as an input or output, using pinMode, digitalWrite, and digitalRead. The DHT11 uses just one signal wire to transmit data to the Arduino. Power comes from separate 5V and ground wires. A 10K Ohm pull-up resistor is needed between the signal line and 5V line to make sure the signal level stays high by default (see the datasheet for more info).
Elegoo Nano Pinout
Here’s an example bitmap version, but I recommend that you download, print and laminate the PDF version for your board.
Sorry, I couldn’t find any more PDF’s on the Internet Archive to host here.
Thanks, Alberto! Alberto’s writing a book, Arduino Basic Connections, but it hasn’t materialised yet, even though he’s raised quite a considerable amount of $$$. According to a tweet from him in May 2014, he’s been ill, so get well soon! It looks like it’s going to be awesomely handy, stuffed with all these pinout diagrams as well as ‘cookbook’ circuits with the same awesome graphic and detail quality and ring-bound. Fingers crossed…
Arduino Uno R3 Tutorial
Here are some other great books you might be interested in:
[amazon asin=1449313876&template=thumbnail] [amazon asin=0071784225&template=thumbnail] [amazon asin=0071771336&template=thumbnail]
Elegoo Nano Datasheet
Bootnote: Reader Nidal Ayari asked me to include a link to his Eagle files for Arduino Pro Mini. I haven’t even looked at them since I Don’t Do Windows (and so my PCB layout tool of choice is KiCad but I assume they’re good ;-).