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clean up old notes

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jacqueline 2024-12-12 14:07:47 +11:00
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18
tangara-mainboard/notes-from-r1.txt
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- double check footprints for small caps
- amp 2.2uF (is this in the bom?)
- USB IC xtal
- battery voltage divider cap
- usb IC power (didnt the app notes call for smaller sizes?)
- fix amp footprint/package discrepancy
- gpio connector needs NPTH
- esp32 xtal footprint is too small
- usb power mosfet has incorrect pinning
- uart rx/tx swapped
- add button to EN pin(?)
- pull IO0 down during boot to flash
- use IO2 for SDA instead, then add a BOOT button?
- need p channel mosfets for most switches :(
- tie 3v3 reg mode to a gpio
- replace analog ldo with filtering caps for high noise
- ESP32 only support to set GPIO0/GPIO1/GPIO3 as mclk signal
- add real pullups to everything i reckon