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Arduino UNO R3

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  • Regular price ₱650.00

Product Description 

        The Arduino Uno is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, 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 a AC-to-DC adapter or battery to get started. The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega16U2 (Atmega8U2 up to version R2) programmed as a USB-to-serial converter. Revision 2 of the Uno board has a resistor pulling the 8U2 HWB line to ground, making it easier to put into DFU mode. Revision 3 of the board has the following new features: 1.0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In the future, shields will be compatible both with the boards that use the AVR, (which operates @ 5V) and with the Arduino Due that operate @ 3.3V. The second one is a not connected pin, that is reserved for future purposes.

Compared to the old version, R3 version major changes:

1) Atmega 16U2 chip alternative 8U2. Means a higher transfer rate and memory.
2) without having to install the driver in the Mac and Linux systems. (In the windows system IDE drive)
3) increase the SDA and SCL interface.

       Arduino UNO R3 2012 a new easy-to-use open source controller, a copycat of Arduino UNO, the biggest difference is that the USB to serial circuit part, instead, is a ATMega16U2 microcontroller, thus the cost of increased software part before.
1.  pin of changes: next to the AREF pin both I2C-pin (SDA and SCL, just Analog 4 and 5 of the copy, not the additional I2C interface), plus the two next to the RESET pin, one IOREF allow expansion board voltage onboard, this pin expansion board just told the onboard voltage (such as UNO 5V, can be seen as the power pins copy, does not provide the level pull), the other is later Scratch placeholder pin.
2.   more stable RESET circuit. The RESET key position has changed, has been moved to the corner near the USB interface board, more convenient and press.
3.  ATmega16U2 instead 8U2, and this does not mean that the 16K flash of R3 to make your code run faster, this update is a service of the USB interface chip, theoretically It UNO can simulate USB the HID, such as MIDI / Joystick / Keyboard.


  • Microcontroller: ATmega328
  • Operating Voltage: 5V
  • Input Voltage (recommended): 7-12V
  • Input Voltage (limits): 6-20V
  • Digital I/O Pins: 14 (of which 6 provide PWM output)
  • Analog Input Pins: 6
  • DC Current per I/O Pin: 40 mA
  • DC Current for 3.3V Pin: 50 mA
  • Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader
  • SRAM: 2 KB (ATmega328)
  • EEPROM: 1 KB (ATmega328)
  • Clock Speed: 16MHz


  • Model:UNO R3
  • Color:Black + blue
  • Material:Heavy gold plate
  • Features:Using ATMega 16U2 microcontroller
  • Dimensions: (2.72 in x 2.09 in x 0.55 in)/(6.9 cm x 5.3 cm x 1.4 cm)/(Size: L x W x H)
  • Weight: 0.95 oz (27 g)


  • [K01] Arduino Uno R3 Microcontroller Development Board
  • USB Cable




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