The Raspberry Pi is much more powerful than an Arduino but it has a few limitations of its own. Its I/O is much more limited, it can't use common Arduino shields, and it needs a regulated 5V power supply...
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The Arduino compatible MicroLink
If Arduino is your development platform of choice the tiny self-contained MicroLink board offers some interesting features. At just 50 x 32 mm it contains an ATmega328, an SIM800H quad band GSM module and on-board USB and battery charging capabilities...
Linux Foundation Launch Dronecode
At the Embedded Linux Conference Europe held in Dusseldorf in Germany the Linux Foundation have announced an initiative called Dronecode which will bring together existing open source drone projects and assets under a nonprofit structure governed by the Linux Foundation
The Arduino Gemma
In a presentation at the Maker Faire held in Rome this weekend Arduino co-founder Massimo Banzi gave a preview of the soon to be released Gemma wearable Arduino board. The 27 mm diameter board contains an ATtiny85 processor programmable from the Arduino IDE via Gemma’s micro USB connector.