ItsyBitsy M0 Express and ItsyBitsy M4 Express
A1 is located in the middle of the board, near the "A" in
"Adafruit". Ground is labled "G" and is located next to
"BAT", near the USB Micro port. 3V is found on the
opposite side of the USB port from Ground, next to RST.
You have 6 analog pins you can use. For a full list, see
the pinouts page (https://adafru.it/BMg) on the main
guide.
Metro M0 Express and Metro M4 Express
A1 is located on the same side of the board as the barrel
jack. There are multiple ground pins available. 3V is
labeled "3.3" and is located in the center of the board
on the same side as the barrel jack (and as A1).
Your Metro M0 Express board has 6 analog pins you
can use. For the full list, see the pinouts
page (https://adafru.it/AMb) on the main guide.
Your Metro M4 Express board has 6 analog pins you
can use. For the full list, see the pinouts
page (https://adafru.it/B1O) on the main guide.
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