The Arduino Uno R3 is an excellent basic board that utilizes the ATmega16U2 microcontroller for basic to intermediate projects.
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The Arduino Uno R3 is the third revision of the original Arduino Uno, and is the result of years of refinement from multiple manufacturers and involved suppliers. It has many minor differences, as well as a few major differences, such as the upgrade of the microcontroller from an ATmega8U2 to the ATmega16U2, as well as an IOREF pin to allow shields to adapt the voltage from the board.
Some of the minor differences between the R3 and the original UNO include solder pads connecting to pins PB4 up to PB7 of the USB, header pins for the ICSP header rather than solder pads, a 10 pin connector which includes the AD4/SDA and AD5/SCL for I2C, as well as some extra pull-up resistors and other small components. These changes have made the board more both more powerful and accessible, making it a good successor to the standard version of the Arduino Uno.
The Uno R3 runs at a clock speed of 16 MHz, and has a total of 14 digital I/O pins. It has 6 analog input channels and 6 PWM channels, with a flash memory of 32 KB, which is ample space for many small to medium scope projects.
|Input Voltage (recommended)||– 7-12V|
|Input Voltage (limits)||– 6-20V|
|Digital I/O Pins||– 14|
|PWM Channels||– 6|
|Analog Input Channels||– 6|
|DC Current per I/O Pin||– 40 mA|
|DC Current for 3.3V Pin||– 50 mA|
|Flash Memory||– 32 KB of which 0.5 KB is reserved by bootloader|
|SRAM||– 2 KB|
|EEPROM||– 1 KB|
|Clock Speed||– 16 MHz|
|Dimensions||– 2.7” x 2.1” / 68.6mm x 53.4mm|
|Weight||– 25 g|
The Arduino Uno R3 is part of the Arduino range, which is open-source hardware designed to make experimentation more accessible. This means that there is a plethora of coding, software and other resources available on the net that beginner and advanced makers alike can utilize – in order to experiment with or practice creating interactive stand-alone objects or software-based automations.
Some basic – but certainly not boring – projects involving the Arduino Uno R3 include:
Some makers, however, just can’t help but take their projects further, and some of the more advanced projects include:
As you can see, the open-source nature of Arduino allows inventors, makers and tinkerers to truly explore the possibilities of simple and easy-to-use microcontrollers. And with the Arduino Uno R3 being the third revision, you can be sure that this board is not only easy to use, but also powerful enough to cater to most basic to intermediate projects.
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