Circuit Playground Express
A1 is located on the right side of the board. There are
multiple ground and 3V pads (pins).
Your board has 7 analog pins that can be used for this
purpose. For the full list, see the pinout
page (https://adafru.it/AM9) on the main guide.
Trinket M0
A1 is labeled as 2! It's located between "1~" and "3V" on
the same side of the board as the little red LED. Ground
is located on the opposite side of the board. 3V is
located next to 2, on the same end of the board as the
reset button.
You have 5 analog pins you can use. For the full list, see
the pinouts page (https://adafru.it/AMd) on the main
guide.
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