I was trying to recreate a project from instructables that had used an lcd screen. I was able to see that the calculations were being done with the serial monitor up but the commands sending it to print to the lcd either didn't work or it was connected incorrectly. The link is below, thanks for any help in advance.
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Hi,
There is an error in this project.
In the code, the button pin has the internal pull-up resistor
switched on. " pinMode(buttonPin, INPUT_PULLUP);"
And it is tested if it has been tightened to start the reaction measurement process.
" //user indicated ready and now timer starts
if (digitalRead(buttonPin) == LOW "
But in the pin assembly there is a pulldown resistor.
This confirms what friend @PaulRB said about the site Instructables ,
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Remove red link going from tactile switch to positive and replace with black link going to negative but most importantly, remove the 220ohm resistor from the tactile switch to ground.
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