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Arduino Uno Rev 3
A classic open-source physical computing board for learning, prototyping and building stand-alone interactive projects. It can also connect to software runni...
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A classic open-source physical computing board for learning, prototyping and building stand-alone interactive projects. It can also connect to software running on your computer, including environments such as Flash, Processing and MaxMSP.
This Rev3 board uses an ATmega16U2 USB interface instead of the earlier 8U2 or FTDI solutions, allowing faster transfer rates and more memory. Linux and Mac do not need drivers, while Windows uses an INF file included with the Arduino IDE.
The Rev3 layout adds SDA and SCL pins next to AREF, plus IOREF and a reserved not-connected pin near RESET. It works with existing shields and can adapt to newer shields that use these additional pins.
The open-source Arduino IDE is available for Mac OS X, Windows and Linux. On some computers, the board requires the Arduino 1.0 drivers folder for first-time installation; one Arduino Uno R3 board is included.
Specifications:
- Microcontroller: ATmega328 microcontroller
- Input voltage: 7-12V
- Digital I/O pins: 14 Digital I/O Pins (6 PWM outputs)
- Analog inputs: 6 Analog Inputs
- Flash memory: 32k Flash Memory
- Clock speed: 16Mhz Clock Speed
Jargon buster
Plain-language definitions for the technical terms used above.
- Flash memory
- Flash memory is non-volatile memory that retains stored data even when power is removed, and can be erased and rewritten in blocks. It lets data such as firmware, settings or saved records persist across power cycles.
- IDE
- Short for Integrated Development Environment, a program used to write, run and manage code. It matters because some learners prefer a traditional coding workspace instead of a guided notebook-style lesson.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- SCL
- The clock line used by the I2C bus to keep data transfers timed between a controller and connected devices. When wiring I2C, SCL must be connected to the SCL pin on every device sharing the bus.
- SDA
- The data line used by the I2C bus to carry information between a controller and connected devices. When wiring I2C, SDA must be connected to the SDA pin on every device sharing the bus.
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Arduino Uno Rev3 Schematic
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