I've seen a few people talking about an "Advent" calendar of making.

I wonder if it's feasible to design a new PCB each day for a month…

My biggest concern is if I even have 31 PCB ideas… 😬😅

— Greg (@GregDavill) December 1, 2020

The talented Greg Davill took on the challenge of designing an average of 1 circuit board design and layout per day for 31 days in December.

Advent Calendar of Circuits 2020

1. gdpi SYZYGY pod featuring 2x digital video ports
2. resonance Addon board for card10 to add video output
3. meiji-led-ring Illuminator to fit around the front of a microscope
4. pcie_x4 SYZYGY pod creating a PCIe x4 add-in card
5. icebreaker++ icebreaker FPGA board, upgraded with an ECP5
6. pcie_x1 SYZYGY pod creating a compact PCIe x1 add-in card
7. arm-watch New ARM based controller for the Casio CA-53W watch
8. syzygy-sgmii Gigabit ethernet using an SGMII based PHY
9. hdmi-si HDMI breakout board
10. quad-7segment PMOD with a quad 7segment
11. syzygy-breakout Breakout board for a standard SYZYGY connector
12. icebreaker++-ram icebreaker FPGA board, upgraded with an ECP5 (+extra RAM)
13. sd-dummy Dummy SD card to connect to a host system via SDIO
14. gpdi-serdes GPDI using the serdes
15. rpi-hq-camera Connector for the Raspberry Pi HQ camera
16. syzygy-pmod SYZYGY to PMOD adapter
17. pmod-gnss GNSS PMOD, GPS + Glonass
18. led-panel Breakout for some White LEDs
19. syzygy-txr-breakout SYZYGY TXR4 to SMA connectors
20. syzygy-dual-atto320 SYZYGY to dual Atto320 LWIR sensors
21. syzygy-rgb888-lcd SYZYGY 5″ 800×480 LCD panel
22. memory-lcd-wing minimal wing for OrangeCrab
23. syzygy-flir-tau2 SYZYGY tau2 LWIR core
24. syzygy-flir-boson SYZYGY boson LWIR core
25. SCD30-3d-model 3d model for the SCD30 CO2 Sensor
26. esp32s2-co2-monitor ESP32s2 + Sharp memory LCD + CO2 Monitor
27. jtag-programmer FT232H based JTAG programmer
28. ECPBreaker ECP5 based icebreaker update, FX2 HS USB + SYZYGY
29. esp32s2-lepton Small ESP32 based thermal camera
30. esp32s2-breakout ESP32S2 + Sharp memory LCD
31. syzygy-epc901 SYZYGY breakout with an EPC901 CCD + 50MSps ADC

Day 28: ECPBreaker?
I'm still not sure about the name.

Another variant of the icebreaker, but with an ECP5, this time it uses an FX2 USB controller, and includes HyperRAM and a SYZYGY connector with adjustable VCCIO.https://t.co/oDLDTol9OL pic.twitter.com/I23INgpPXd

— Greg (@GregDavill) December 28, 2020

Day 5: icebreaker++, the icebreaker fpga design upgraded with an ECP5.https://t.co/KHi8CAm621 pic.twitter.com/7pB2vewsmk

— Greg (@GregDavill) December 5, 2020