Duet 6HC / SBC daughterboard
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I'm a big fan of the Duet3 / SBC setup, but the physical interface to a raspberry pi has always bothered me (Different mount points, separate 5v power supply). I intend to develop a daughterboard(?) with the same footprint as the 6HC that will interface a Raspberry PI CM5, and include lots of raspberry pi IO, and some quality of life features for cleaner 6HC/SBC installs.
Features:
- most of the same IO as the CM5 IO board (ethernet, USB A, USB C, HDMI, DSI/CSI, microSD, m.2, fan connector)
- footprint and mounting holes identical to 6HC
- 26pin IO connector is in-line with 6HC such that an enterprising person could make a direct board-to-board connection (or more likely just use a very short ribbon cable)
- 40mm cooling fan for CM5, also cooling back side of 6HC (standard 4 pin connector)
- Accept 12v - 48v Vin similar to 6HC
- Some extra fused distribution of Vin
- 5v @ 5A switching power supply for raspberry pi
- 24v @ TBD A switching power supply (possibly 12/24v selectable?) for powering 1LC toolboards on systems with greater than 24v
*On the bubble: pcb or chip wifi antenna (I'll likely be sandwiching the CM5 between the two boards, considering adding a separate WIFI antenna for fun, but may just opt for an external antenna. )
I have a preliminary schematic and board layout, but was curious if others had ideas to consider before I order a prototype PCB. If I'm successful I'll of course share the design with the community, but I don't have any plans to produce any significant quantities.
