The pullups go to the I/O expander, not switches!
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@ -142,7 +142,7 @@
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[[teensy-1.jpg]]
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The two 2.2kΩ (Red Red Red Gold) pull-up resistors ensure the switches give a clear reading when open.
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The two 2.2kΩ (Red Red Red Gold) pull-up resistors ensure a clear signal between the USB controller and the I/O expander.
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[[https://learn.sparkfun.com/tutorials/pull-up-resistors][Read more about pull-up resistors here]].
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[[teensy-2-fuxor-reziztorrs.jpg]]
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