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A compact six-layer carrier board for the Raspberry Pi Compute Module 4, Compute Module 5 and compatible modules. Rev2 retains the 120 mm × 40 mm form factor while improving CM4 compatibility and adding an I²S connector and two underside expansion-board interfaces.
On the previous revision, the M.2 interface was limited to CM5, while CM4 and compatible modules could not use the socket. PWM fan control was also unavailable with those modules, causing the fan to run continuously at full speed. Rev2 corrects both limitations.
Rev2 introduces two 50-pin board-to-board connectors on the underside. These expose signals for a planned expansion board featuring:
The board can be powered through either:
The active power source is selected using the onboard jumper connector.
This repository contains the KiCad project files, custom symbol library, footprint library and associated 3D models for the carrier board.
The main carrier board design is complete. The companion HDMI and CSI expansion board is planned separately.
This hardware design is licensed under the Apache License 2.0.
Designed by Asad Imran.
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