Preparing release v0.9.0

Author: twystd

m5-stack/NOTES.md

@@ -17,6 +17,13 @@
 13. https://www.rtl-sdr.com/pi-pico-rx-a-breadboard-software-defined-radio-based-on-the-rp2040-raspberry-pi-pico
 14. https://101-things.readthedocs.io/en/latest/breadboard_radio.html
 15. https://blog.porucha.net/2024/pico-sdr
+16. https://en.wikipedia.org/wiki/Singulation
+17. https://electronics.stackexchange.com/questions/9255/rfid-antenna-array
+18. https://www.microchip.com/en-us/application-notes/an710
+19. https://electronics.stackexchange.com/questions/27357/diy-130khz-rfid-antenna-design-for-reading-tags-in-large-area
+20. https://electronics.stackexchange.com/questions/414681/how-to-design-125khz-antenna-for-1-meter-rfid-reader
+21. https://electronics.stackexchange.com/questions/490243/how-to-transmit-a-125khz-signal
 
 ## R&D
 1. [Lean](https://kuruczgy.com/blog/2024/07/31/lean-esp32)
+

m5-stack/Rev.0/TODO.md

@@ -14,6 +14,8 @@
 ## USB
 - [x] RaspberryPi
 - [ ] MacOS
+- https://github.com/piersfinlayson/tinyusb-vendor-example
+- https://github.com/piersfinlayson/picoboot
 
 
 ## [ ] Enclosure

m5-stack/Rev.1/NOTES.md

@@ -71,6 +71,8 @@
 29. Slot in enclosure for USB cable
 30. WS2812 level translation
     - https://electronics.stackexchange.com/questions/756253/ws2811-strip-kinda-works-with-diode-level-shifter-but-not-mosfet
+31. Maybe put ESD diodes on back?
+    - https://hackaday.com/2025/12/09/pcb-design-review-tinysparrow-a-module-for-can-hacking-v2/
 
 - https://hackaday.com/2025/09/09/freecad-foray-from-brick-to-shell/
 - (?) https://www.ti.com/product/MSPM0C1104