Merge pull request #46 from ErinCall/document-pull-up-resistors

Document pull up resistors
adereth · Jun 25, 2017 · ad6b982 · ad6b982
2 parents 14d5078 + 73ac960
commit ad6b982
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/guide/README.org b/guide/README.org
@@ -142,7 +142,8 @@
 
     [[teensy-1.jpg]]
 
-    Some interesting pull up 10k resistor business here... (TODO add a small diagram and notes)
+    The two 2.2kΩ (Red Red Red Gold) pull-up resistors ensure a clear signal between the USB controller and the I/O expander.
+    [[https://learn.sparkfun.com/tutorials/pull-up-resistors][Read more about pull-up resistors here]].
 
     [[teensy-2-fuxor-reziztorrs.jpg]]