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LilyPad ProtoSnap Plus Hookup Guide - learn.sparkfun.com
https://learn.sparkfun.com/tutorials/lilypad-protosnap-plus-hookup-guide?_ga=2.234157401.659504291.1516640116-204410570.1509632255
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If you’re using an external component or sensor on expansion port A9, move the slide switch to the OFF position to
keep the switch from interfering with your input or output signal.
Below is an image of the LilyPad temperature sensor attached to the LilyPad ProtoSnap Plus expansion ports for
testing.
For more information about about expansion port A9 in the
section.
Setting Up Arduino