Preservation Edition] Circuit Diagram Summary of Major Microcomputer Boards

Hello, this is Bono.

We often need to know the circuit diagram of a microcontroller board, so we have compiled a circuit diagram of a microcontroller board that is often used.
It would be useful to bookmark this page or otherwise keep it readily available.

Click here for a pin distribution summary.

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Arduino Series
RaspberryPi Series
M5Stack
- BASIC
- CORE2
Microbit
obniz

Arduino Series

RaspberryPi Series

Basically, it is summarized here -> https://www.raspberrypi.com/documentation/computers/raspberry-pi.html

Caution! The following circuit diagram is a simplified version that only describes the circuit around connectors and power supply. Please note that "not all components are listed.

Raspberry Pi Model B+

https://datasheets.raspberrypi.com/rpi/raspberry-pi-b-plus-reduced-schematics.pdf

Rapsberry Pi 2 Model B

https://datasheets.raspberrypi.com/rpi2/raspberry-pi-2-b-reduced-schematics.pdf

Rapsberry Pi 3 Model B

https://datasheets.raspberrypi.com/rpi3/raspberry-pi-3-b-reduced-schematics.pdf

Rapsberry Pi 4 Model B

https://datasheets.raspberrypi.com/rpi4/raspberry-pi-4-reduced-schematics.pdf

Raspberry Pi Zero W

I couldn't find Zero WH, so I had no choice but to post Zero W.

https://datasheets.raspberrypi.com/rpizero/raspberry-pi-zero-w-reduced-schematics.pdf

Raspberry Pi Pico

https://datasheets.raspberrypi.com/pico/pico-datasheet.pdf

Raspberry Pi (complete schematic)

I have received information from a follower that the full schematic, not the simplified version, is available here (thank you, Mopurun).

Maybe Model B

Maybe ModelB+.

It doesn't specify which type of Raspberry Pi it is, but since it doesn't say 2 or 3 and it is dated April 2012, it is natural to assume that it is probably the first generation schematic.
Personally, one thing that puzzles me is the difference that in the schematic here, the 5V to 3.3V is made with a linear regulator called NCP1117, while in the excerpted version described above, it is made with a switching method.

I think the complete version is the correct schematic because the board at hand had NCP1117 mounted on it, but I wonder if there is also a switching system...?
If anyone knows, please let me know.