To control the metric buttload of individual segments I decided to use the Pi PICO as it seamed to have the grunt needed to get the job done.  There is an FPGA between the PICO and the display matrix. The FPGA performs the mapping between a 2 dimensional array and the 7 segment digits.  More to come on the FPGA internals.

Major components in the design:

• MAX10 FPGA
• Pi PICO
• MCP7940 Real Time Clock
• TMP75 Temp sensor (just because I had some in my box of parts)
• RFM69HCW RF module
• Footprint for two HUB75 display chains or 8 SPI data out chains buffered to 5V.

Pretty proud of how the layout turned out.  Love working with FPGAs as the the pinout is almost infinitely adjustable.