I am trying to wire up several momentary switches - but these only have two poles:
I have one pole going to the PIN5 (digital input) on the arduino, and the other going to the +5V line.
Where do I wire ground to with the 10K pulldown resistor? I was able to make this work with a tactile push button but that had 4 legs, so I am unsure what to do here. I am not an electrical engineer by any stretch of the imagination - so pardon my ignorance.
Thanks!
Wire it to ground and use the internal pull-up resistor.
pinMode(5, INPUT_PULLUP);
The internal pullup was giving me unpredictable results, is there a way to do it with the pulldown?
On that tactile switch, that is effectively still a two pole switch right? It just has two pins for each pole
That is probably because of bouncing. Have you tried to use a button library?
I am pretty new to the arduino stuff - i am not using a button library that i know of
Adapted from the link in post #4:
#include "Arduino.h"
// 1. Include the library
#include "EButton.h"
// 2. Instantiate the object and attach it to PIN 5
EButton button(5);
// 3. Handler method for a single-click
void singleClick(EButton &btn) {
Serial.println("We have a single-click!");
}
void setup() {
Serial.begin(115200);
// 4. Attach the handler
button.attachSingleClick(singleClick);
Serial.println("\nClick or double-click!");
}
void loop() {
// 5. Tick the object in a loop
button.tick();
}
I think this will answer most of your questions about connecting buttons of all kinds:
To be clear, it applies to what you have, not just the tactile buttons I've used to illustrate things.
Can you explain more about what you were experiencing with INPUT_PULLUP? What code were you running?
Maybe those switches do not make good contact a very low current flow, not dry circuit type, but are designed for switching higher currents.
Thank you, this clarifies things a lot
If using INPUT_PULLUP, then use this wiring configuration:
pinMode(5, INPUT_PULLUP); in the setup() function.If not, use this wiring configuration:
To the same pole as arduino PIN5.
In the picture your button has screw terminals so you can easily connect two wires to one pole