Arduino with Atmega chip have taken hobbyist, students and professionals to a new level where they can easily integrate and can make projects easily. But chip has limitations like less I/O, running at lower 16 MHz frequency, low Ram, no Debugging. These all things can be easily upgraded with ARM Powered Microcontroller like ARM Cortex M3, M4. here are some of the small cheap development boards which can boost up your requirement for extra horse power
