What is Arduino UNO? Features and Application

What is Arduino UNO?

When you step into this space of Arduino by hearing or seeing from somewhere, you will hear various cards and shields related to Arduino. Most projects will use Arduino UNO when you do not need a high input and output element in the first steps or afterward. From this point of view, we entered this area and explained Arduino UNO which is the most used card for our friend who is reading this article.

Arduino UNO is one of the most widely used Arduino cards in the field, which uses the ATmega328 microcontroller for people’s use. This platform operates between 7-12V and has 14 digital input-output pins. You can also use 6 of them for PWM. That is to say, Arduino UNO has 14 pines. You can see the properties as tabs at the bottom;

SEE ALSO: What is Alternating (AC) Current?

Arduino UNO General Features

• Microcontroller: ATmega328

• Supply Voltage: 7-12V

• Working Voltage: 5V (How many Volts does Arduino UNO work?)

• Number of Input-Output Pin: There are 14 digital pins. Six of them can be used as PWM. 8 bits of analog signal output can be obtained from 6 pins.

• Current at Pin: 40mA (5V), 50mA (3.3V)

• FLASH: 32 KB

• SRAM: 1 KB


• Working Clock Speed: 16MHz

• Communication can also be provided via USB.

• It has both 3.3V and 5V output on it.

• It has both a USB port and a DC adapter input for communication and power.

• FTDI integrated is not used as a USB-serial communication converter, but the ATmega8U2 does the conversion. This allows faster transmission. In other words, when the converter integrated is used, it is perceived as any USB-connected device, while the work of this converter has been done with software, making it perceive by the attached computer as a solid USB plug-and-play device. For Linux and Max, it is not necessary to install drivers, for Windows, an inf file is required. Another feature of the FTDI chip not being used is that Arduino Uno is added to the system with keyboard, mouse, joystick, etc. and the ease of using it in the system in this way. Since it is very popular, project examples made with Arduino Uno can be found a lot.

Arduino Pin Properties

You can see Arduino pin properties from the picture below. It is also available in detailed explanations under the picture;

Arduino Pin Properties

• Vin; Arduino is normally powered by USB. You can also supply 7-12V via this pin.

• 5V; The regulator gives 5V. This way you can supply 5V from this output pin.

• 3.3V; With this output pin giving the regulated 3.3V in the same way, you can supply 3.3V to your car.

• GND; Ground shortening. So Earth is the pin. The minus (-) of the elements in your dynamite will come here.

• IOREF; Arduino provides supply voltage selection for card inserts.

• RX-TX; Serial communication pins. You can send data with TX, you can also receive data with RX.

• 2 and 3 Pins; These pins are a featured cylinder. With these pins, you can make an external interruption.

• PWM; These pins are 3, 5, 6, 9, 10, 11, so the pins you see on the ~ symbol are PWM pins. With the analogWrite () command, you can get 8-bit analog signal output.

• SPI; 10,11,12,13. Using the Pinlerle SPI library, you can communicate with SPI.

• TWI or I2C; With the A4 and A5 pins you can communicate using the protocol known as TWI or I2C.

• AREF; It is used as a reference voltage in analog inputs.

• Reset Button; The microcontroller provides you with a reset.

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