Hello
i have the idea of creating my own CM4 Carrier board which will be somewhat similar to the official IO board and will probably hire a PCB Designer off of Fiverr
i already had the idea of modding the existing IO Board as spoken here: https://www.diyaudio.com/community/threads/modded-rpi4-board-for-better-sq.381877/
but i think a own carrier board is potentially more viable/better and im probably also end up selling a few units here if people are interested
but i need some assistence designing it, what to look out for etc, would be someone willing to help me?
for example
i want to replace the LDO`s on the CM4 itself, can i just remove the LDO`s on the CM4 and feed 3,3V and 1,8V through the GPIO header? so we can place LT3045 on the Carrier board itself?
would a GNDLayer/ Layer1 / GNDLayer / Layer2 / GNDLayer design be beneficial?
would be extensive decoupling/power"buffering" and other things beneficial?
what should i look out for beside those?
i should also note that this board is just to make use of the CM4 with the different variants (so we can keep wlan/bt out and make use of the emmc) while isolating noise as much as possible (i will further reduce noise in software with underclocking etc)
i also had in mind to use the pcie lanes for a usb 3.0 controller for periphery (ssd storage, wlan/bt stick etc) and the otg usb 2.0 lanes for the dac
there will be no audio circuits so we can use for example the ian canada hats, it should be just a somewhat basic carrier board
Best Regards
i have the idea of creating my own CM4 Carrier board which will be somewhat similar to the official IO board and will probably hire a PCB Designer off of Fiverr
i already had the idea of modding the existing IO Board as spoken here: https://www.diyaudio.com/community/threads/modded-rpi4-board-for-better-sq.381877/
but i think a own carrier board is potentially more viable/better and im probably also end up selling a few units here if people are interested
but i need some assistence designing it, what to look out for etc, would be someone willing to help me?
for example
i want to replace the LDO`s on the CM4 itself, can i just remove the LDO`s on the CM4 and feed 3,3V and 1,8V through the GPIO header? so we can place LT3045 on the Carrier board itself?
would a GNDLayer/ Layer1 / GNDLayer / Layer2 / GNDLayer design be beneficial?
would be extensive decoupling/power"buffering" and other things beneficial?
what should i look out for beside those?
i should also note that this board is just to make use of the CM4 with the different variants (so we can keep wlan/bt out and make use of the emmc) while isolating noise as much as possible (i will further reduce noise in software with underclocking etc)
i also had in mind to use the pcie lanes for a usb 3.0 controller for periphery (ssd storage, wlan/bt stick etc) and the otg usb 2.0 lanes for the dac
there will be no audio circuits so we can use for example the ian canada hats, it should be just a somewhat basic carrier board
Best Regards
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