Specifications
?More GPIO pins. The GPIO header has grown to 40 pins, while retaining the same pinout for the first 26 pins as the Model A and B.
?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.
?Smaller neater form factor. We�ve aligned the USB connector with the board edge, moved composite video onto the 3.5mm jack, and added four squarely-placed mounting holes. Model A+ is approximately 2cm shorter than the Model A.