Momentary push button wiring

[jakeepoo]

THis momentary buttion is on when pressed and have to be held and when released it turns off.

what are the 3 middle pins for? im guessing the 2 outside are for + and -

[cattledog]

Best to check with multimeter, but my guess is that the center is common and the outer terminals are Normally Open and Normally Closed.
The two other pins are probably +/- for a led light in the switch.

[gilshultz]

If you have it you can look it up on the web with the model number and make.

[shagreobe]

If you look closely, there are letters on the switch... the 2 outer are for a light, and the middle ones, as positioned in the picture are top=NC, middle=NO, bottom is Common

[jakeepoo]

ahh yea that makes sence

alr thx

[jakeepoo]

So, I have 2 buttons (the 2 red buttons) and when I press the button all the way down I want the button to type 1 letter(a) no matter how long I hold it (stays in the on position) and will turn off as so as I let go writing only one letter.

So far I have this, this is written for a toggle switch and when flipped up stays in the up/on position till I flip it back to the off position and writes a single letter(for the on or off position). This code cant work with the momentary button. I would like to add this momentary code to this but i keep getting stuck and need Some guidance on how to code this and how to add the code to what i have. ( in advance thanks for the advice(could be what topics I could focus on to learn to code this, and such) I also have it all wired correctly for this

ps: using a arduino Leonardo and nano for this

#include "Keyboard.h"

boolean states[] = {false, false, false, false, false, false, false, false, false, false, false, false, false, false};
char hotkeysOn[] = {'g', 'c', 'q', 'a', 'b', 'w', 'd', 'l', 's', 'j', 'k', 'm', 'x', 'z'};
char hotkeysOff[] = {'g', 'c', 'q', 'a', 'b', 'w', 'd', 'l', 's', 'j', 'k', 'm', 'x', 'z'};

void setup() {
  for (int i = 0; i <= 13; i++) {
    pinMode(i, INPUT);
  }
  Keyboard.begin();
  Serial.begin(9600);
}

void loop() {
  for (int i = 0; i <= 13; i++) {
    if (digitalRead(i) == HIGH && !states[i]) {
      states[i] = !states[i];
      Keyboard.write(hotkeysOn[i]);
      
      if(i==12){
        Keyboard.write(hotkeysOn[i]);
        Keyboard.write(hotkeysOn[i]);
      }

    }
    else if (digitalRead(i) == LOW && states[i]) {
      states[i] = !states[i];
      Keyboard.write(hotkeysOff[i]);
    }
  }
  delay(10);
}

[J-M-L]

Simple solution : You could use a button library like Button in easyRun or OneButton or Toggle

[jakeepoo]

@Delta_G I honestly have no idea, i tryed writing with this idea in mind but wond work idk why

i wired it too the two outside( + and -) maybe i wired it wrong? but i dont think

[jakeepoo]

so the code is correct, its a mechanical problem? @Delta_G

[gcjr]

look this over
recognizes button presses (going from off to on)

// check multiple buttons and toggle LEDs

enum { Off = HIGH, On = LOW };

byte pinsLed [] = { 10, 11, 12 };
byte pinsBut [] = { A1, A2, A3 };
#define N_BUT   sizeof(pinsBut)

byte butState [N_BUT];

// -----------------------------------------------------------------------------
int
chkButtons ()
{
    for (unsigned n = 0; n < sizeof(pinsBut); n++)  {
        byte but = digitalRead (pinsBut [n]);

        if (butState [n] != but)  {
            butState [n] = but;

            delay (10);     // debounce

            if (On == but)
                return n;
        }
    }
    return -1;
}

// -----------------------------------------------------------------------------
void
loop ()
{
    switch (chkButtons ())  {
    case 2:
        digitalWrite (pinsLed [2], ! digitalRead (pinsLed [2]));
        break;

    case 1:
        digitalWrite (pinsLed [1], ! digitalRead (pinsLed [1]));
        break;

    case 0:
        digitalWrite (pinsLed [0], ! digitalRead (pinsLed [0]));
        break;
    }
}

// -----------------------------------------------------------------------------
void
setup ()
{
    Serial.begin (9600);

    for (unsigned n = 0; n < sizeof(pinsBut); n++)  {
        pinMode (pinsBut [n], INPUT_PULLUP);
        butState [n] = digitalRead (pinsBut [n]);
    }

    for (unsigned n = 0; n < sizeof(pinsLed); n++)  {
        digitalWrite (pinsLed [n], Off);
        pinMode      (pinsLed [n], OUTPUT);
    }
}

[jakeepoo]

@gcjr @Delta_G so i got it to work the pins on the outside are LED and inside are NO,NC,C(normaly closed etc)

[gcjr]

buttons are typically connected between the pin and ground, the pin configured as INPUT_PULLUP to use the internal pullup resistor which pulls the pin HIGH and when pressed, the button pulls the pin LOW.

connect button using NO and Common

[anon57585045]

duplicate thread
https://forum.arduino.cc/t/momentary-push-button-wiring/1146286/2

[Coding_Badly]

Threads merged.