I am trying to use the code in the tutorial at http://www.arduino.cc/en/Tutorial/TwoSwitchesOnePin.
It does not seem to work. When no switches are pressed it reports that switch 1 is pressed. Pressing switch 2 does report properly.
I have tried removing everything except the resistor from pin 2 to ground and it still reports switch 1 is pressed. Does the tutorial code work as advertised? Anyone see and problems with with the code?
Thanks for the help.
Does the tutorial code work as advertised?
Well it is not a solid engineering solution that's for sure.
What value do you have for the digital input to ground resistor? Try making it lower.
I tried 200K and 1M but I will go lower and see what happens. Thanks for the suggestion.
artart:
I tried 200K and 1M but I will go lower and see what happens. Thanks for the suggestion.
Generally your pullup/down resistor is 10k or so..
The tutorial says use a 10K pull up resistor on one switch and a 200K to 1M resistor from the pin to ground. I tried going all the way down to 50k and no joy. Strange.
Use 10k ohm resistor for a better result......
No I think you are missing the point please read the tutorial.
I tried going all the way down to 50k and no joy.
Then I think you have wired it up wrong.