Timeline for How do I provide a negative current?
Current License: CC BY-SA 4.0
5 events
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| Feb 27, 2019 at 23:15 | comment | added | Arseni Mourzenko |
Interesting. I found that they have each a resistor by testing the board with a multimeter, but given my low experience with electricity, I may have made a mistake. I was also under impression that if I don't use a resistor, I'll burn the board if I set pinMode to INPUT instead of INPUT_PULLUP. I'm happy this impression is wrong (since the board is still alive).
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| Feb 27, 2019 at 22:16 | comment | added | Roberto Lo Giacco | Then the part in the question where you state all those components are "connected to ground with their own resistor" was wrong: there are no resistors in series with the buttons. | |
| Feb 27, 2019 at 21:38 | comment | added | Arseni Mourzenko |
@RobertoLoGiacco: because digitalRead always returns 1, independently of whether the button is pressed or not.
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| Feb 26, 2019 at 23:46 | comment | added | Roberto Lo Giacco | Why using analogRead instead of digitalRead?!? Please consider analog sampling is a lot slower than reading a digital value... You said there are resistors connected to the buttons: those resistors should act as pull-down, forcing the non-pressed buttons to GND so that when you press the button the voltage jumps to 5V while the resistor limits the current flowing. | |
| Feb 26, 2019 at 20:05 | history | answered | Arseni Mourzenko | CC BY-SA 4.0 |