doc update

reinzor · Mar 22, 2018 · 6af8b2a · 6af8b2a
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diff --git a/README.md b/README.md
@@ -15,7 +15,7 @@ Connect raspberry PI camera module to board
 
 We use BCM pin 3 (index 5) since it has an internal pull-up resistor. This means that the digital value will get pulled-up 
 to 1 if it is floating (no connection to the ground or a 3v or 5v output). Pin 3 is floating when our switch is open, so since 
-we have a pull-up resistor, the digital value will be 1 when the swich (push button) is open (not pressed). If the push button
+we have a pull-up resistor, the digital value will be 1 when the switch (push button) is open (not pressed). If the push button
 is pressed, we would like the value to go from 1 to 0 and raise a falling event. Therefore, the other wire needs to be 
 attached to the ground (index 9). We use a pull-up vs a pull-down since it is less sensitive for interference.  
 

diff --git a/illustration.png b/illustration.png