Hello all!
I'm very new to Arduino and running into a probably stupid question...
I'm trying to read the button input simply as in the attached image, but when the button is pressed, there isn't any signal... However, when I change line 5 from "INPUT" to "INPUT_PULLUP", the signal shows even if it is reversed 1 and 0. I fail to understand why...
Your image suggests a floating input
Plz Add a Pullup 5-10 K resistor between the button.
1 Vcc--------R------button------Pinout 10
/
\GND
Hello xyli21
Take a view to gain the knowledge how to adapt a button.
hth
Have a nice day and enjoy coding in C++.
Are you try it on real Arduino and button or on emulator?
I'm using a 2-pin push button on a real Arduino, but it didn't work, so I try to replicate it in the emulator. My goal is to get a signal 0 when the button is not pressed and a 1 when it is pressed...
According your schematic you should get inverse signal - 0 when button is pressed and 1 otherwise
Actually, I'm not getting anything but 0 with the schematic I showed... But when I have INPUT_PULLUP instead of the INPUT, I have the reversed as you said...
Ah, I got it now. I needed a resistor and to connect the pin with the ground instead of with 5v... Thank you everyone!
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