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Usually used to be connected with switches to use as reset button.Arduino ( / ɑː r ˈ d w iː n oʊ/) is an open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices. Reset pins in Arduino are active LOW pins which means if we make this pin value as LOW i.e., 0v, it will reset the controller. AREF Pin 18Īs mentioned already the AREF- Analog Reference pin is used as a reference voltage for analog input for the ADC conversion. For using this I2C feature we need to import a library called Wire library. One for clock (SCL) and another for data (SDA). I2C supports multi master and multi slave with only two wires. For long distance communication we use the I2C protocol. Since SPI communication also has its disadvantages such as 4 essential pins and limited within a device. Similar to digital pins in Nano, analog pins also got some other functions as well. If you want the reference voltage to be 0V to 3.3V, we can give 3.3V to AREF pin (18 th Pin) by using the analogReference () function. By default, the pins are measured from ground to 5V. Each of these analog pins has a inbuilt ADC of resolution of 1024 bits (so it will give 1024 values). This means you can connect *8 channel analog sensor inputs for processing. Arduino Nano Analog Pins Pins - 18, 19, 20, 21, 22, 23, 24, 25, and 26Īs mentioned earlier UNO got 6 analog input pins but Arduino Nano has 8 analog inputs (19 to 26), marked A0 through A7. The pin 16 is being connected to the blinking LED on the board.
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If you remember your first Arduino code, blinking LED, then you’ll definitely came across this Pin16. So you have to include a library called SPI Library for using this feature. Even though the hardware has this feature, the Arduino software doesn’t have this by default.
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These pins support synchronous communication with SCK as the synchronizing clock.
#ARDUINO NANO PINOUT LED SERIAL#
When you don’t want the data to be transmitted asynchronously you can use these Serial Peripheral Interface pins. These pins can be used to trigger three types of interrupts such as interrupt on a low value, a rising or falling edge interrupt and a change in value interrupt. These pins can be used to enable interrupts INT0 and INT1 respectively by using the attachInterrupt () function. When we need to provide an external interrupt to other processor or controller we can make use of these pins. The PWM signal can be generated using analogWrite () function. PWM Pins Pins - 6, 8, 9, 12, 13, and 14Įach of these digital pins provide a Pulse Width Modulation signal of 8-bit resolution. The pins RX and TX are connected to the corresponding pins of the USB-to-TTL Serial chip. These two pins RX- receive and TX- transmit are used for TTL serial data communication. Serial Communication Pins Pins - 1, 2 1 - RX and 2 - TX Other than the digital input and output functions, the digital pins have some additional functionality as well. Each of the 14 digital pins on the Nano pinout can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. Each pin can provide or receive a current of 40mA, and has a pull-up resistance of about 20-50k ohms. The pins work with 5V voltage as maximum, i.e., digital high is 5V and digital low is 0V. The fascinating feature in Nano is that it will choose the strongest power source with its potential difference, and the power source selecting jumper is invalid.Īrduino Nano Pin Description Arduino Nan0 – Pin DescriptionĪrduino Nano Digital Pins Pins - 1, 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16Īs mentioned earlier, Arduino Nano has 14 digital I/O pins that can be used either as digital input or output. This port is used for both programming and serial monitoring. The Nano board doesn’t have a DC power jack as other Arduino boards, but instead has a mini-USB port. The extra 2 pins of Arduino Nano serve for the ADC functionalities, while UNO has 6 ADC ports but Nano has 8 ADC ports. The main difference between them is that the UNO board is presented in PDIP (Plastic Dual-In-line Package) form with 30 pins and Nano is available in TQFP (plastic quad flat pack) with 32 pins. The Nano is inbuilt with the ATmega328P microcontroller, same as the Arduino UNO. This article discusses about the technical specs most importantly the pinout and functions of each and every pin in the Arduino Nano board.Īrduino Nano has similar functionalities as Arduino Duemilanove but with a different package. The Nano board weighs around 7 grams with dimensions of 4.5 cms to 1.8 cms (L to B). The Arduino Nano, as the name suggests is a compact, complete and bread-board friendly microcontroller board.