Questions tagged [debounce]
Contact bounce (also called chatter) is a common problem with mechanical switches and relays. Debounce or debouncing is an a hardware or software technique to eliminate this effect.
51 questions
2
votes
2
answers
378
views
Simple debounce coding
am a complete beginner at coding with Arduino, although I have used them for a few years by copying other peoples code. I only understand a tiny fraction of the layout of a sketch and would really ...
- 23
-1
votes
1
answer
164
views
Problems with reacting to joystick button press
I am trying to use a joystick in a project for device control. Pressing a joystick button should cause incrementing a variable. INPUT_PULLUP mode is used for internal button.
As I understand it, when ...
- 23
0
votes
3
answers
3k
views
Interrupt on button press + debouncing
I want to have an interrupt function executed whenever a button is pressed.
The button is connected to pin 2 and the GND. Therefore, the pin is turned to LOW whenever the button is pressed. In ...
- 1,435
1
vote
1
answer
406
views
Push button unexpected increment/decrement. I'm using attachInterrupt
I'm new to Arduino and need assistance from knowledgeable people.
I'm having a problem with my code, which allows the user to increase or decrease the number by pressing buttons. From time to time, ...
- 13
0
votes
1
answer
589
views
Basic hardware debouncing
I was watching Jeremy Blum's Arduino tutorial series, and he explained the need for debouncing in a simple circuit involving a pushbutton. Pressing the button once should mean the led stays on, and ...
- 169
2
votes
0
answers
192
views
Please help with my tinkercad code. Debouncing stopwatch with lcd
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int ssPin = 8;
int resetPin = 9;
bool cntrRunning = false;
int sec = 0;
int min = 0;
double currentMillis;
void setup()
{
...
- 21
2
votes
1
answer
124
views
Problems with detecting button digital state
I am trying to start an event after pressing and holding the FLASH built-in Nodemcu button for a specific time, I wrote two functions, one for debouncing and detecting the state, the other is to ...
- 33
0
votes
1
answer
142
views
How to add indicator lights to button sketch
I would like to add leds to each button switch in the first code, The first code sends midi messages to a DAW I would like it to also turn on a led as an indicator light. The switch needs to turn the ...
- 39
1
vote
1
answer
320
views
Measure revolutions per second with reed switch
I'm trying to measure speed of a fly wheel with a reed switch with one magnet (1 pulse per full rotation). I have an 100nf cap connected to switch to help with debounce.
#include <Arduino.h>
...
- 113
3
votes
1
answer
543
views
Code test the duration press of the button
I wrote code that tracks the duration of a button click. It has bounce protection and frequent clicks. (Freeze)
My code:
bool freeze_time, btn_read, debounce;
unsigned int freeze_timer, btn_timer;
#...
- 263
-1
votes
2
answers
2k
views
Reading a rotary encoder using digital pins of Mega 2560 directly using port registers?
I'm trying to write an interrupt service routine for an Arduino Mega 2560 to decode a quadrature rotary encoder. I've got an ISR (Interrupt Service Routine) that responds to the falling edge of ...
- 5,752
0
votes
1
answer
86
views
Custom Debounce Code Not Working
It's my custom debounce code
It keeps the led on by flipping the required threshold value when triggered after the led has turned on to keep the led in a high state and vice verse triggered again, ...
4
votes
2
answers
942
views
Interrupts: use of the "volatile" keyword with a structure pointer for button debounce
I've written a small sketch targeted at the Arduino Uno (ATmega328P) to debounce a mechanical pushbutton using the summing/integration technique:
#include <IntegratingDebounce.h>
#define ...
- 143
0
votes
3
answers
3k
views
Debouncing Multiple Buttons
I'm creating a binary calculator with my Arduino. This will take two different binary numbers and add them together. I am focusing right now on the Byte One Input screen. For this, I can use two ...
- 43
1
vote
2
answers
590
views
State Machine Logic problem with added states monitoring safety switches
I have been working on getting a state machine to work correctly but am having trouble with adding in the last bit of logic. What it needs to do is several things:
Read two button inputs.
Make sure ...
- 109
0
votes
1
answer
3k
views
Soft debouncing from an interrupt during stand-by
My current setup has the arduino in 'stand-by' power saving mode, therefore i am unable to use any means of a traditional soft debouncer, such as Bounce2, as far as I know.
I went ahead and attached ...
- 35
2
votes
4
answers
614
views
Debouncing, or problem with my code?
I'm using a simple microswitch on pin 2, to activate an external interrupt.
void pause()
{
Serial.print("\n\nPause\n\n");
delay(1000);
}
void setup()
{
pinMode(2, INPUT_PULLUP);
...
- 110
1
vote
2
answers
903
views
How can I make this button toggle the position of a servo?
I am trying to make something so when I press the button it sets the position of the servo to 50 and then when I press it again, it sets it to 150. The button is momentary not a toggle switch. This is ...
- 35
1
vote
3
answers
284
views
Help Improving Debouncing
In short, I am attempting to debounce several buttons using something like a while loop instead of delays.
This code runs in a box with a series of buttons on it, if the correct sequence of buttons ...
- 81
1
vote
1
answer
2k
views
Rotary Encoder problem with LCD Display
Program reads rotary encoder correctly without bouncing in this code:
int val = 0;
byte clkPin = 3;
byte dtPin = 2;
bool lastClk;
bool lastDt;
void setup() {
pinMode(clkPin,INPUT);
pinMode(dtPin,...
- 25
2
votes
4
answers
1k
views
Why doesn't this debounce function work?
Edit 2
I made a function that works, but I'm still confused about just one thing...
I'm very confused about how variables work in C++.
In this program...
boolean debounce(void)
{
static ...
- 23
1
vote
2
answers
1k
views
Instead of 1 and 0, make display say On or Off
So for my project, I am making a button that turns on and off an LED, but also display the state of the led on an LCD and by Serial. But my issue is, I don't want it to just show a 0 or a 1, I want ...
1
vote
2
answers
4k
views
How to simulate delay() to debounce mechanical button using millis()?
Im trying to use the millis() function as a replacement for the delay() function in order to debounce a mechanical button. This is for an electric drum kit I am building. Im using a teensy Arduino to ...
- 13
1
vote
1
answer
278
views
Help with button library, hold>2s doA else doB
I'm using JChristensen's Button Library to debounce my buttons and provide extra functionality. I'm trying to use his press & hold function to do something if the button is pressed and held for ...
- 33
8
votes
7
answers
19k
views
Good button debouncing/stateChange library
I need debouncing/stateChange for a push button configuration. Is there a good library for debouncing/stateChange buttons in Arduino (without delay)?
- 181