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The Duemilanove Arduino was a popular microcontroller board with open source hardware and software for prototyping electronic devices. It had 32KB of memory and could be extended with shield boards. It was replaced by the faster and more uniform Uno, but older projects can still be adapted.
The Duemilanove Arduino® was a microcontroller board released in 2009. Like all other Arduino® boards, the Duemilanove had open source hardware, meaning it could be legally produced by any manufacturer without paying any licensing fees. The board was then paired with similarly licensed software to ensure compatibility with computer software and other microcontrollers. Arduino® is a microcontroller platform designed to enable professionals and hobbyists to rapidly prototype electronic devices.
As the main entry level board, the Duemilanove Arduino® was quite popular. It used a USB interface to connect to computers and could handle a variety of sensors and controllers. Additionally, the Duemilanove Arduino® had 32 kilobytes of onboard memory, double the capacity of the Diecimila, which it replaced. Like its predecessor, the Duemilanove could be extended through the use of shield boards, which added additional functionality such as wireless communications, GPS devices, or specialized connections such as Musical Instrument Device Interface (MIDI).
This card is more limited than the advanced models and its successors, but the developers have used it to create some very interesting projects. One of the most common uses of the Duemilanove was robotics. Even without a specialized shield, it could easily control motors and sensors that could allow a robot to perform simple tasks like following a light.
By early 2011, the Duemilanove Arduino® had largely been replaced by the Uno Arduino®. The Uno has many of the same features as the Duemilanove, but adds a significantly faster processor and an updated USB interface. Another significant change is the greater uniformity in production; the Duemilanove Arduino® had several interchangeable components, where a faster or slower component could be used. The Uno eliminated this variability, in order to make the card easier to create programs that would be guaranteed to run at the same speed on any Uno card.
Although it is now officially retired, many older Arduino® building projects still mention the Duemilanove Arduino®. In most cases, these plans can easily be adapted to work with the Uno instead. The only times the Uno wouldn’t easily replace the Duemilanove are the times a programmer has used the limitations of the Duemilanove’s processor to control the speed of execution. In these cases, the software must be artificially slowed down to work properly on the new platform. The open source nature of the Arduino® platform also means that while it has officially been superseded by the Uno, the board may still be available from manufacturers who choose to continue producing the cheaper Dueminanove board.
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