The FlatSat is a testing apparatus we will use to have easy access to all of our boards, since in their final configuration the boards will be assembled in a stack. The main purpose of the FlatSat is to ‘break out’ the PC104 header and connect it to the adjacent boards.

Our current plan for the FlatSat is to design a large board in this style: https://github.com/JonisK/FlatSat.

Here is the Altium project: https://americas-uworbital-university-of-waterloo.365.altium.com/designs/F66DE31F-4BB9-439F-A662-96B539A874DC?variant=[No+Variations]&activeView=PCB&activeDocumentId=Flatsat.PcbDoc#design

Maximum current on power traces would be 1.5A, these traces should be routed at 0.508mm. For signal traces a width of 0.254mm is acceptable.

• Termination resistors for SPI?

• jumpers in series with power outputs from EPS so we can measure current draw independently of current-sense system

• Need to determine how solar panels will connect to the flatsat

• Boards to be mounted in flatsat should have actual PC104 connector soldered on. Not clear from the Altium what the connector part number is supposed to be but here’s a good one

  • Since these connectors are decently expensive and we’ll need a lot of them, we should only be putting the connectors on once we have already bench tested the board separately (ie. flatsat should only have known working boards on it)

• We will also need a bottom mounting plate to mount the PCBs onto - should be pretty simple, just a couple appropriately sized screws and plastic standoffs - coordinate with the mech team