CM4 Carrier board TOFU

TOFU is a carrier printed circuit board for the Raspberry Pi Compute Module 4.  Inspired by our daily needs, it is intended for industrial applications, but may also be used by enthusiasts looking for a robust and complete solution on a compact footprint.

The size of the board is 9x9cm and its main features are :

• Compute Module 4 socket (CM4 not included)
• Standard Raspberry Pi 40 pin GPIO header
• Gigabit Ethernet port with PoE through the official Raspberry Pi PoE HAT
• M.2 2242/3042 socket (key B) socket with micro-SIM cardholder (M.2 has been successfully tested to interface NVMe SSDs and USB 3G/4G network cards)
• 3x USB-A ports
• Full-size HDMI port
• Camera and display ports (newer 22pin version, flexible adapter cables can be purchased separately)
• Two power inputs for industrial connectors (2.1mm barrel and standard 3.5mm terminal block). 
• Input voltage can be set between 7.5 and 28V and is also available on a 3x1 header for sharing to HATs requiring higher voltages (wall plug AC-DC power supply not included, recommended power rating: >24W).
• Micro SD card slot
• USB-C port to use as an OTG device and for programming purposes. It may also be used to power the CM4, but not the M.2 card.
• Circuit protections added for safety reasons (ESD, over-and reverse-current protections)
• Standard Raspberry Pi, CM4, and 4 additional M3 mounting holes for design flexibility