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.
*Note: This is not an original Arduino brand product, it is manufactured with the same components and functionality by a different manufacturer.
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
1 x Arduino Uno R3 Microcontroller board
1 x USB cable
Well not much to say about this board it is Fantastic had just a bit of trouble to get it to run at first but that was do to me needing to up-date the IDE for Arduino I have the Nano, Mega and they are just as awesome I since have read a bit about how to tell a clone from the original the first two boards if you looked close at a Ardunio then at the clone you could spot a few different mainly the values that are used in the component's (16v Adruino clone has 25v ele caps)BUT this board looking at a original and then the clone I CAN NOT spot one different between the two!! Totally blown away ALL the same component's printing silk screen same part numbers If I didn't know better I would say the messed up and sent a ORIGINAL !!! lol Very Pleased to say the least works just as good a original! to bad they are all gone again GREAT JOB HK !!!!Excelente calidad en la fabricacion lo recomiendo ampliamentenot the orginal Arduino but bootloader is preinstalled and all works fine.Arduino... novos desafios, vamos l!Good quality, tried some programs and works really fine, with good response time to load sketchs. Sensor shields v5 fits fine.works great, just like the genuine version.
the PCB, soldering and the overal build quality are good alsoI just received 4 of these arduino boards from Hobby King. The 3.3V output on all of them is a fail. It ranges from 1.7V to 3.2V. Not usable if you plan on using 3.3V as a reference or to power sensors.
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