RASPBERRY PI MODEL B+
The Raspberry Pi is a series of credit card-sized single-board computers The original Raspberry Pi is based on the Broadcom BCM2835 system on a chip (SoC), which includes anARM1176JZF-S 700 MHz processor, VideoCore IV GPU.
Compared to Raspberry Pi B, the Raspberry Pi B+ has the following:
More GPIO. The GPIO header has grown to 40 pins, while retaining the same pinout for the first 26 pins as the Model A and B.
More USB. We now have 4 USB 2.0 ports, compared to 2 on the Model B, and better hotplug and overcurrent behaviour.
Micro SD. The old friction-fit SD card socket has been replaced with a much nicer push-push micro SD version.
Lower power consumption. By replacing linear regulators with switching ones we’ve reduced power consumption by between 0.5W and 1W.
Better audio. The audio circuit incorporates a dedicated low-noise power supply.
Neater form factor. We’ve aligned the USB connectors with the board edge, moved composite video onto the 3.5mm jack, and added four squarely-placed mounting holes.
See the documentation for technical details.