Raspberry Pi Model B+ 512MB RAM with 700 MHz CPU

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Compared to the Model B, Model B+ has:

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 behavior.
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.

The Model B+ is perfectly suitable for use in schools: it offers more flexibility for learners than the leaner Model A or A+, which are more useful for embedded projects and projects which require very low power, and has more USB ports than the Model B.

Released in July 2014, the Model B+ is an updated revision of the Model B. It increases the number of USB ports to 4 and the number of pins on the GPIO header to 40. In addition, it has improved power circuitry which allows higher powered USB devices to be attached and now hot-plugged. The full size composite video connector has been removed and the functionality moved to the 3.5mm audio/video jack. The full size SD card slot has also been replaced with a much more robust microSD slot.

The following list details some of the improvements over the Model B.

Current monitors on the USB ports mean the B+ now supports hot-plugging
Current limiter on the 5V for HDMI means HDMI cable-powered VGA converters will now all work
14 more GPIO pins
EEPROM readout support for the new HAT expansion boards
Higher drive capacity for analog audio out, from a separate regulator, which means a better audio DAC quality
No more backpowering problems, due to the USB current limiters which also inhibit back flow, together with the "ideal power diode"
Composite output moved to 3.5mm jack
Connectors now moved to two sides of the board rather than the four of the original device
Ethernet LEDs moved to the ethernet connector
4 squarely-positioned mounting holes for more rigid attachment to cases etc.

The power circuit changes also means a reduction in power requirements of between 0.5W and 1W.

Schematics for Raspberry Pi B+ Board:

Revision 1.2

Processor: The Broadcom chip used in the Raspberry Pi Model B+

Please refer to following for more details:

Mechanical drawings of the Raspberry Pi Model B+

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Type: Single Board Computer