The different flavors of a Raspberry Pi

The Raspberry Pi Foundation has released four major models of the Raspberry Pi computer. They the are Model A, Model B, Model B+, and Model A+. The Raspberry Pi's CPU is the Broadcom BCM2835 chip. It contains an ARM processor running at 700 MHz and a powerful graphics chip. The board features HDMI and Composite (RCA) video outputs, USB ports, two expansion slots, a Micro USB port for power, and an array of GPIO (General-purpose input/output) pins to interact with the outside world.

Since all models share the same basic hardware platform, all the examples in this book are applicable to all the versions.

	Model A	Model A+	Model B	Model B+
USB	1	1	2	4
Ethernet	0	0	1	1
Video outputs	HDMI/Composite	HDMI/Composite via 3.5 mm jack	HDMI/Composite	HDMI/Composite via 3.5 mm jack
Memory	256 MB	256 MB	512 MB	512 MB
Storage	SD card	MicroSD card	SD card	MicroSD card
Power usage	300 mA	300 mA	700 mA	600 mA
Price	$25	$20	$35	$35
Differences	Low cost solution. Does not have built in Ethernet and it has only one 1 USB port.	Newest board. Low power, low cost, and much smaller form factor.	Original board. Balances features and price.	New revision to the B board. Has a new layout, 4 USB ports, and more GPIO pins.