Based on my previous projects I needed a customized RPI4 carrier board with 2 cameras input. The initial idea was taken from this project: https://www.tindie.com/products/dronecz/minimal-carrier-board-for-compute-module-4/.

I made several changes such as 4-layer PCB, added second camera lanes, differential routing for both cameras and HDMI, added temperature sensor, and added I2C and UART connectors.

I have added also two jumpers that allow disabling wireless and Bluetooth. I have tested nearly every connection. SD card connector does not work if you are using RPI4CM with emmc, otherwise, it should(not the fault of this design but the RPI design decision that I was not aware of while making this board)

More details are on Github page.