arduino uno price in bd
Arduino Uno R3
1,300.00৳  1,100.00৳  Add to cart

Arduino Uno R3



The ideal beginning to electronic and programming The Arduino Uno board is a perfect starter board for people who are just beginning to develop using Arduino. Arduino platform. Simple to use, you just connect it to a computer via the USB cable, and it’s prepared.

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Overview Arduino uno price in bd

Arduino Uno is a microcontroller board based on the ATmega328P (datasheet). We Will also discuss Arduino uno price in bd, It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and a reset button.

It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started… You can tinker with your Uno without worrying too much about doing something wrong, In a worst-case scenario you can replace the chip for a few dollars and start over again.

“Uno” means one in Italian and was chosen to mark the release of Arduino Software (IDE) 1.0. The Uno board and version 1.0 of Arduino Software (IDE) were the reference versions of Arduino, now evolved to newer releases.

The Arduino uno price in bd is the first in a series of USB Arduino boards, and the reference model for the Arduino platform; for an extensive list of current, past, or outdated boards see the Arduino index of boards. arduino uno price in bd We Will also discuss about this.

Getting started : Arduino uno price in bd

The Getting Started with Arduino Uno page contains all the information you need to configure your board, use the Arduino Software (IDE), and start tinkering with coding and electronics.

From the Tutorials section, you can find examples from libraries and built-in sketches as well other useful information to expand your knowledge of the Arduino hardware and software.

Find inspiration for your Uno projects from our tutorial platform Project Hub.

Technical specifications

DIGITAL I/O PINS14 (of which 6 provide PWM output)
FLASH MEMORY32 KB (ATmega328P) of which 0.5 KB used by bootloader
SRAM2 KB (ATmega328P)
EEPROM1 KB (ATmega328P)
LENGTH68.6 mm
WIDTH53.4 mm
arduino uno in bd2

Programming Arduino uno price in bd

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Arduino/Genuino Uno can be programmed with the Arduino/Genuino Uno can be programmed by using the ( Arduino Software (IDE)). (IDE)) “Arduino/Genuino Uno” from the Tools menu > Board (according to the microcontroller you have on the board). For more information refer to the reference and tutorials.

The ATmega328 in the Arduino/GenuinoUno comes pre-programmed with a bootloader that lets you add new code without the need for an external programmer. It communicates with its original STK500 protocol ( reference, header, and C documents).

You may also disable the bootloader to program the microcontroller using its ICSP (In-Circuit Serial Programming) header by using Arduino ISP and similar. Refer to the instructions for more information.

The ATmega16U2 (or 8U2 on the revision 1 and 2 board) The firmware code source is accessible on the Arduino repository. The ATmega16U2/8U2 is loaded using the DFU bootloader. It is activated by:

  • On Rev1 boards, connect the solder jumper to the side of the board (near the map of Italy) and then reconnect using the 8U2.
  • On boards with Rev2 or later On Rev2 or later boards, there is a resistor pulling the HWB line 8U2/16U2 to the ground, making it simpler to switch to DFU mode.

Then, you can make use of the FLIP program from Atmel (Windows) and its DFU programming tool (Mac OS X, and Linux) for loading an updated firmware. Also, you can utilize the ISP header to load an external programmer (overwriting your DFU bootloader). Read this tutorial contributed by users for more details.


It is the Arduino Uno price in bd that has a resettable polyfuse that shields computers’ USB ports from overcurrent and shorts. Although the majority of computers come with internally-protected USB ports, the fuse offers an additional layer of security. If more than 500mA is applied to the USB port the fuse will stop connections until overload or short is eliminated.

The differences from other boards

The Uno differs from previous boards by the fact that it does not utilize its FTDI USB-to serial driver chip. Instead, it uses the Atmega16U2 (Atmega8U2 until version R2) programmed as a USB to serial converter.


The Arduino Uno price in bd board is powered by a USB connection, or by an external power source. The power source is selected automatically.

External (non-USB) power sources can be via an AC-to DC adapter (wall-wart) or a battery. The adapter is connected to the board by plugging the 2.1mm center-positive plug into the power connector. Leads from a battery may be put into the GND and Vin pins of the power connector.

The board is able to operate with an external source of 6 to 20 Volts. If it is supplied with less than 7V the 5V pin could provide less than 5 voltages, and the board could be unstable. If the voltage is higher than 12V the voltage regulator could overheat, damaging the board. The suggested range is 7-12 volts.

The power pins function as the following:

  • Vin. The voltage used to power the Arduino/Genuino board if it’s connected to an external source of power (as opposed to 5 volts coming from a USB connection or another regulated energy source). You can supply voltage to this pin, or in the case of supplying voltage through the power connector, you can access the pin.
  • 5V.This pin is regulated to output 5V to the regulator that is in the board. The board can be powered by power from either the DC power connector (7 12V) or its USB connector (5V) or the VIN connector on the circuit board (7-12V). The 5V and 3.3V pins will bypass the regulator and could harm the board. We don’t advise it.
  • 3V3. 3V3. 3.3 Volt supply that is generated from the internal regulator. The maximum current draw is 50mA.
  • GND. Ground pins.
  • IOREF. Its pin located on Arduino/Genuino board is the voltage reference that the microcontroller works. When properly configured, the shield can detect the IOREF pin’s voltage and choose the proper power source, or allow voltage translators to be enabled at the outputs so that they can operate with five-volt or 3.3V.


The ATmega328 is 32 KB in size (with 0.5 of it being occupied by the bootloader). It also comes with 2 KB of SRAM, and 1 KB of EEPROM (which can be written and read using the Library of EEPROM ).

Input and Output

Find out the mapping between ATmega328P pins and Arduino ports. The mapping for ATmega8 and 328 ports are the same.

Every one of the digital inputs and outputs found on Uno are able to function as output or input, by through pinMode(), digitalWrite(), and digitalRead() functions. They function at 5 voltages. Each pin is able to provide or receive 20 milliamps as a recommended operating condition.

It also has an external pull-up resistor (disconnected in default) that is 20-50k Ohm. Maximum 40mA can be the limit that cannot exceed at any I/O pin in order to prevent permanent harm to the microcontroller.

Furthermore, some pins are specialized for:

  • Serial: 0 (RX) and 1 (TX). This pin is used for receiving (RX) as well as transmitting (TX) Serial data from TTL. These pins are connected to the same pins on the ATmega8U2 USB-to TTL Serial chip.
  • External Interrupts 2 and 3. These pins are able for an interruption to be triggered upon the low end of a value, rising or falling edge, or even a change in value. Refer to an attachInterrupt() procedure for more information.
  • PWM: 3, 5, 6, 9, 10, and 11. The output can be 8 bit PWM with an analogWrite() function.
  • SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK). These pins allow SPI communication with SPI. SPI library.
  • LED: 13. It has an LED built-in that is driven by the digital pin 13. If the pin is at a HIGH number, then the LED will be on. When the pin is low it’s off.
  • The TWI interface is A4 and SDA pin, and SCL pins A5. Allows TWI communication by using the Wire library. Wire library.

The Arduino Uno price in bd includes six analog inputs labeled A0 through A5, all of which have the resolution of 10 bits (i.e. 1024 different values). The default range is from the ground up to 5 volts However, it is possible to modify the upper limit of their range with the AREF pin as well as an analogReference() function.
There are a few different pins:

  • AREF. Reference voltage for analog inputs. Useful in conjunction with analogReference().
  • Reset. This line is brought LOW for the controller to be reset. This is usually utilized to add the reset button on shields that block the one that is on the board.

Communication Arduino uno price in bd

Arduino Uno price in bd has a number of communication options to a PC, an Arduino/Genuino board, or other microcontrollers. The ATmega328 can provide UART-TTL (5V) serial connectivity and is accessible on the digital pins 1 (RX) as well as 1 (TX). The ATmega16U2 board communicates with this serial communications via USB and is a COM port virtualized to software running on the computer. 

The 16U2 firmware is based on a USB COM driver that is standard and no additional driver is required. However, On Windows on Windows, Windows, a .inf file is required on Windows. . Arduino Software (IDE) Arduino Software (IDE) includes an interface for monitoring serial connections that allows simple textual information to be transferred through and to the board. 

Its RX as well as TX LEDs of the board flash when data is sent via the USB-to serial chip and USB connection to a PC (but they are not for serial communications on pins 0 and 1.).

SoftwareSerial is a SoftwareSerial library that permits serial communication on any of the digital pins on the Uno.

The ATmega328 is also compatible with I2C (TWI) along with SPI. Arduino Software (IDE) supports I2C and SPI communication. Arduino Software (IDE) includes the Wire library that simplifies the usage of the I2C bus. See the documentation for more details. To communicate with SPI, you must utilize this SPI library.

Automatic (Software) Reset

Instead of having to press the reset button prior to upload, this Arduino/Genuino Uno board has been constructed in a manner that it can be reset using software that is running on a computer. A hardware flow control line (DTR) that is part of the ATmega8U2/16U2 board is connected to the line for reset of ATmega328 through a hundred nanofarad cap. 

When this line is activated (taken at a low level) the reset line is lowered sufficiently to allow the chip to be reset. Arduino Software (IDE) Arduino Software (IDE) uses this ability to allow users to upload their code by hitting the upload icon on the toolbar of the interface.

 This implies that the bootloader will have a lower timeout since the reduction of DTR can be coordinated to the beginning of the process.

The setup also has other consequences. If it is connected to the Uno connects to the computer that runs Mac OS X or Linux It resets itself every time the connection is established to it by the software (via USB). In the next few seconds or so the bootloader runs within the Uno. 

Although it is programmed to block malformed data (i.e. anything that is not an upload of code) it will also intercept the initial few bytes of data that are sent to the board when the connection has been opened. If an application running on the board is receiving an initial configuration or other information at the time it starts it is important to ensure that the program that it is communicating with is waiting for a second following the opening of the connection prior to sending the data.

The Arduino Uno price in bd is equipped with a trace that can be cut in order to disable the auto-reset feature. The pads on each side of the trace could be joined to allow it. The trace is labeled “RESET-EN”. It is also possible to turn off the auto-reset feature by connecting a 110-ohm resistor between 5V and the reset line. Check out this thread on the forum for more information.

Revisions Arduino uno price in bd

The board’s revision 3 comes with the following new features:

  • 1.0 pinout Pinout 1.0: pinout 1.0: SDA and SCL ports close to the AREF pin, and two pins that are nearer to the RESET pin, which is the IOREF that allows shields to be able to adapt to the voltage that is supplied by the board. In the future, shields will be compatible with the board which uses the AVR that operates on 5V, and the Arduino Due, which operates at 3.3V. The other pin is a non-connected pin that is reserved for use in the future.
  • Stronger RESET circuit.
  • Atmega 16U2 replaces the 8U2.

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2 reviews for Arduino Uno R3

  1. saifur rahman

    best arduino uno r3

  2. Akash Kumer

    Arduino Uno affordable price but the best quality

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