Richard J. Prinz

Walkeras quadcopter brains RX2635H for the Hoten-X and RX2634H for the QR-Ladybird feature an Altera XMEGA32*A4U (which has quite some peripherals and memory) and sensors like gyros and even a wireless USB transmitter. You can get such a board either from an old crashed quadcopter or relatively cheap from the internet like ebay.

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Sometimes you need a component for a project or some tests and there is no or at least no free implementation available. This happens to me when I wanted to translate a geographically position (lat/lon) into a corresponding service URN. RFC 5222 provides more information on that. After reading the RFC which looked not that complicated I decided to implement such a server myself. The goal was also that it should be lightweigt, easy to develop and to deploy into the cloud. So it was obvious to me that node.js and mongodb will be used.
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