We produce the BubbleBoard (successor to the BalloonBoard), a 45mm x 65mm processor-board, with PXA270/520Mhz, SDRAM, Flash NAND, Flash boot-ROM, CPLD; for further details see Hardware.
The BubbleBoard is the result of a collaboration between Cambridge University, M.I.T, Toby Churchill Ltd, iTechnic Ltd, and an assortment of Linux gurus.
BubbleBoards are ready-to-embed, having powerful I/O capabilities including USB (1.0, host and slave), small footprint, low power-consumption and a single connector.
The BubbleBoard is an Open Hardware design, which means we publish the circuit diagram to enable you to DIY.
(Click to enlarge)
You can fit a Micro-SD socket on the rear of the board, top left.
All other pads were for development-only, and are unused.
If fitted to metalwork, use some insulation to avoid that unpleasant fizzle-pop experience.