Raspberry Pi 官方公布 Mode B的相关原理图表，共5张。
分别是：
Raspberry Pi POWER INPUT & OSC
Raspberry Pi HDMI SD Card,composite & Audio
Raspberry Pi Ethernet & USB
Raspberry Pi USER I/O
Raspberry Pi Build Options/PCB layout instructions.
原文如下：
Now that there are Raspberry Pi boards in the wild, we thought it would be a good time to share our schematics with the world. In addition to giving you an idea of how the device works internally, these should also provide the information you need to build add-on boards which attach to the GPIO expansion connector and (in due course) the display and camera connectors.
