tangara-hw/notes-from-r3.txt

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2023-04-18 05:08:14 +00:00
io expander mpn and footprint disagree (warning: mouser product images are reversed)
should SEL be tied to samd?
sd card holder needs to be inset
trs esd protection footprint is wrong
should esp en be a pulldown? then it's off unless the samd turns it on
do we need inrush current limiting after the 3v3 reg?
2023-04-24 01:02:49 +00:00
bump up sd card cp to 47uF, add ferrite after sd mosfet. something like:
- TDK NLCV32T-1R0M-PF
- EMTEK LCD0805-R82K-T