Tag Archives: Uno

Arduino Leonardo

The new board from Arduino, the Leonardo, is pretty much an Uno except that it doesn’t have a dedicated chip for USB communication. The serial port runs in the same chip that runs your sketches (the ATmega32U4). This means that if you reset the board you also reset the USB connection. However, because the serial port is virtual it means that the board can run as a (HID) keyboard or mouse.

Arduino Leonardo

Freetronics LeoStick

The simpler physical wiring means that the Leonardo is cheaper ($20), but it also means that there’s less flash memory and some of the pins have changed, so Uno shields might not work with the Leonardo.

If the Uno footprint is just too big there’s the LeoStick from freetronics ($30).

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DIY Totally Open Source Arduino GSM Cell Phone by Zach Wick

Cell phones (like this and this) are turning out to be a reasonably popular open source project. It makes sense when someone points it out. They are pretty much the Swiss Army knife of the digital world. More importantly, they are useful and versatile but they don’t require any real hardware hacking. That’s important since most of the people doing open source work are comfortable with code and soldering irons…not wrenches.

Here’s an outline of the open source hardware necessary to physically assemble your own touchscreen phone. Zach Wick grabbed all of this stuff off-the-shelf (his or someone else’s).

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