Questions tagged [button]

A button is a simple input component which responds to being pushed by a user.

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2answers
171 views

Arduino open door (outdoor) tonemelody

My problem lies in the fact that I can not stop the "void loop" function and more accurately "StatInDoor". I have to make sure that the "ButtonOpenDoor" works independently of "ButtonCall". If someone ...
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2answers
165 views

Hardware interrupts for buttons not directly assigned to pins

The Adafruit LCD shield offers an LCD and access to 4 button, using only a two wire connection with the Arduino. This is achieved with the MCP23017 I2C port expander IC. These buttons are not ...
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1answer
156 views

Button not working - Arduino Due project (MiniEngine v2)

I am building Arduino Due based project called MiniEngine v2 (an open-source motion control software for timelapse photography). The project is not very active anymore but there are still all the ...
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3answers
2k views

Button and switch to turn on and off LED and changing after time

I have system connected to an Arduino Uno where I want to read whether the switch is open or closed. Based on if the switch is open/closed, I want an LED light to turn on/off. When the switch is ...
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2answers
803 views

Loop code without manually pressing the button

In a piece off code I am modifying I have a button connected to start the code and then it resets its self afterwards. Is they a way to make the arduino loop that code without manually pressing the ...
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1answer
45 views

Help understanding circuit for button example

I´m working on the button example .Basically, i don't quite get the use of this connection. Also, the breadboard i'm using is not quite the ones i see on most tutorials. is there any 'mapping' i ...
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0answers
87 views

my button won't work, why?

I have been trying to get the button to work properly for over a day, but it just won't, can you help me. The lcd display is for another part of this project, not important at the moment, but I can't ...
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1answer
22 views

I want to make a counter but i don't know what i'm missing or am doing wrong

this is the code i made but it gives me an error about te } and also i need to know how to make delays with this int ledPin = 4; int buttonPin=2; int buttonState = 0; // variable for reading ...
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2answers
738 views

LEDs effects changing with a button

So I have a bunch of functions (methods) made and I want to make it so that if the button is clicked (single click) the effects to change... I thought something like: buttonState = digitalRead(...
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2answers
75 views

Button to not run script

I'm looking to have a button that, when pressed down, will mean that the script loaded on the Arduino doesn't run. So far I have: void setup() { pinMode(3, INPUT_PULLUP); if (digitalRead(3) == ...
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0answers
93 views

Arduino: wrong digitalRead results from a pullup pin

A button connects GND to PIN where PIN is any digital pin. I want to catch the moment the button is pressed, so I wrote the following code: void setup () { pinMode (PIN, INPUT_PULLUP); Serial....
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4answers
3k views

Write to serial only if the state of a light sensor changes

I need to know the times when an LED strip turns on and turns off. The LED switch is driven by light dependent resistor. When the sun goes down the LED strip turns on. This is all happening on a ...
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2answers
69 views

When a pushbutton and sensor are in a certain state, do something for a certain period of time (15 seconds)

I have a sketch that contains code for an analog input (FSR sensor), a pushbutton, and 6 blinking LEDs. Currently, the sketch is written to allow the LEDs to blink only when the button is pressed and ...
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2answers
124 views

i am unable to make a correct program using the pushbutton to toggle LED on/off?

I want to toggle the the LED on on my first complete click(i.e. pushing and even releasing the pushbutton) and i want to make my LED off at my second click. This is the program :- int led = 13; int ...
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1answer
64 views

Get when a button close the circuit

That seems to be a bit stupid to myself but I can't figure out to get to know when my button is pushed (closed) or released (open). You must know that this not just a simple push button. Actually it ...
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1answer
5k views

How to restart a counter in a program using a push button in a LDR Tripwire setup

So, trying to configure this code so that when I push the button, the person counter will go to zero and just as it goes, the counter will increase when the LDR will get tripped and again when the ...
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4answers
4k views

Button press with Arduino repeated many times

I have 5V -> button -> 10K resistor -> PIN2 setup with Arduino UNO. My code is very simple: int count = 0; void setup() { pinMode(2, INPUT); Serial.begin(9600); } void loop() { int state =...
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1answer
12k views

Control a motor with a button

Code: int motorPin = 9; // the pin the motor is connected to void setup() { pinMode(motorPin, OUTPUT); } void loop() { motorOnThenOff(); //motorAcceleration } void ...
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0answers
105 views

How can I call the variable **Servo::write** in Arduino for my 360 servo?

I'm trying to control a Servo with a push button and to help me watching if it is working I am using a LED but I'm not sure if I'm doing it well the Servo::write so I need you to tell me what am I ...
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1answer
3k views

Why is the piezo buzzer not making any sound?

My ciruit: My code: // Pin 13 has a LED connected on most Arduino boards. // give it a name: int led = 13; const int buttonPin = 2; // the setup routine runs once when you press reset: void setup() ...
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5answers
11k views

Stop Led's from blinking

My code: // Pin 13 has a LED connected on most Arduino boards. // give it a name: int led = 13; const int buttonPin = 2; // the setup routine runs once when you press reset: void setup() { // ...
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1answer
4k views

Led and button simulation of a blink

My circuit: My code: // Pin 13 has a LED connected on most Arduino boards. // give it a name: int led = 13; const int buttonPin = 2; // pushbutton connected to pin 2. // the setup routine runs once ...
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3answers
4k views

Toggle a led with a switch

My code: const int buttonPin = 2; // the number of the pushbutton pin const int ledPin = 13; // the number of the LED pin bool buttonState = 0; // variable for reading the ...
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1answer
66 views

Need help with my project

Can anyone give me the full code of my project because my code is not working? My aim is that when the Z axis of an accelerometer is below 370 and a pushbutton connected to a pin 2 becomes high, then ...
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2answers
14k views

Voltage changes but digitalRead always HIGH

I developed simple push button project I used wemos D1 mini I connected D3 pin to pull down 1K resistor. I used multimeter to measure D3 pin voltage. When i push the button, D3 pin voltage changes ...
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1answer
403 views

Stop time in Tkinter Stopwatch with a PushButton

So, my main goal is to make a stopwatch with Tkinter, in which time is stoppped with an external pushbutton My void loop function in Arduino Uno is void loop() { if(digitalRead(BUTTON) == HIGH){ ...
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1answer
2k views

Reading PushButton status with pyserial

I'm trying to read the status of a PushButton with python via pyserial. In the loop function of Arduino Uno I have this: void loop() { if(digitalRead(BUTTON) == HIGH){ Serial.print("E\n"); while(1){...
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1answer
106 views

Bot not activating after button press

This bot is supposed to begin moving forward when the button is pressed, and stop after counting 3 lines of tape on the ground. Currently it is set up to scan the color of the floor at the beginning ...
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1answer
81 views

Anything wrong with this code?

Sorry for any grammar mistakes. It's my second language. I had a little test with my Arduino Uno R3 I connected 2 buttons to power , GND using 10k resistors and pins 2 and 4. I connected piezo to ...
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2answers
158 views

Showing chronometer on PC controlling the begining and end of time by Arduino

I'm really new on this Arduino thing, so I don't know whether what I'm gona ask is feasible or not. I'd like to make a chronometer in the computer but the controlling button (beginning and end of ...
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2answers
4k views

Multiple buttons on single interrupt, how to debounce?

Buttons on separate interrupt pins work fine (triggered on FALLING), bouncing is handling by forcing a 80ms lockout period during which further presses are ignored. I like that solution for being ...
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2answers
780 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 ...
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1answer
480 views

How do I lock out a push button input with a selectable delay?

I have a program i am working on where a relay is turned on -> waits a delay -> then turns off after either one of two things happen: 1) A set timer is reached OR 2) someone pushes a push button to ...
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3answers
3k views

How can I setup a LED state change with push buttons?

I'm doing a project using Arduino Uno R3 and I'm trying to use two buttons to change LED state between HIGH and LOW. I have already a code but someting its not right because the LED should be starting ...
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1answer
645 views

matrix buttons 8x8

Hi I have 8 buttons on my Arduino uno and I want to create a matrix 8x8 and give each button a row and a column respectively it is not a keypad just 8 buttons each button have a row and a column ex: ...
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1answer
8k views

Connecting button as PC usb input via arduino

I have button with 2 leads (one red and one black). I would like to connect it to PC which allows a press of the button to register as a key press on the computer. I understand an interface board is ...
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1answer
76 views

Array variable name changes from readings1 to readings2

I've been using two MB1240 Ultrasonic Sensors with analogRead, and have found that after using bubble sort, the array is found in array readings2, and not readings1. This is important because I would ...
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5answers
7k views

How do I repurpose Arduino's reset button

Is there a way to repurpose the reset button for the code, like an on-board button? I don't need it to reset, but it would be useful to make it run through a list of RGB LED cycles.
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1answer
921 views

Arduino with two (or more) push buttons

I am trying modify this setup for two push buttons https://www.arduino.cc/en/Tutorial/Button. The code seems rather trivial int yellowButtonPin = 2; int blueButtonPin = 4; int yellowButtonState = 0;...
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2answers
5k views

How to I press a button once to display text and again to remove it?

My code is displaying voltage and I want to have a button that when pressed it displays a text and when I pressed it again it would turn off the text. I put the word "YES" just for a test float vPow =...
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1answer
100 views

Arduino Skill Stop Push button error

I made a skill stop game from Arduino Uno and a pushbutton.Here is the code: byte led_one=2; byte led_two=3; byte winner_led=4; byte led_four=5; byte led_five=6; byte pushbutton=12; byte score=0; int ...
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1answer
611 views

Servo Control using Pushbutton

I was trying to build a system that when the user pushes the button, the servo rotates 45 degrees and than returns back to zero. This system is going to be duplicated as there will be two servos and ...
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2answers
274 views

Hold a random number

I am trying to create a code that has at least 6 servos attached and two buttons for a two player game. I want to be able to roll a random number and have it hold that value then when it is that ...
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2answers
506 views

digispark - 2 pin push button to iterate through an hashmap

I'm trying to create a project with my digispark where i can iterate through an hashmap, when i press the push button the digispark writes via digikeyboard the values from an hashmap. Each time i ...
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3answers
788 views

use button to select variable

i have a need to use 3 buttons a a simple option/variable selector at sketch start up ... Pretty much at startup , script must wait for button press ( one of 3 ) , when button is pressed , use that ...
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3answers
224 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 ...
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2answers
4k views

Update variable using buttons

I made a part of code to change the temperature limit for alarm system. On warm days user have to change the temperature limit with buttons and OLED display. The question is: How can the variable ...
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1answer
59 views

OnKeyPress in a arduino

So, I have 3 buttons to a arduino. I want to detect the button press on the 3 of them. For that, i've created a function: int OnKeyPress (int port) { int LastState, BeginState, r; r = 0; ...
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1answer
3k views

Use transistor to press button on external device

I have a small device with a simple push button. I'd like my Arduino to be able to make the device register button pushes. It seems like the best way to do this is to use a transistor to close the ...
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2answers
3k views

How to count the number of button presses then play a sequence?

When I press the button once, sequence s1() plays. When I press the button twice, sequence s2() plays. When I press the button thrice, sequence s3() plays. When I press the button 4 times, sequence s4(...

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