Questions tagged [switch]

In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another

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1answer
79 views

Driving higher loads with PWM

My Arduino Pro Micro can source 500mA from 3.3V VCC, when it is USB powered. The chip itself, is rated for 200mA, though, and its output pins for 20mA recommended, 40mA max. I am looking to have 3 PWM ...
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0answers
59 views

Check if electrical switch is working and data log it [closed]

I have a small task at hand, During the testing of the working of a single way electrical switch, If supply is given to the switch and 1 ON and 1 OFF is treated as 1 cycle, Can i record each cycle. ...
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2answers
166 views

Digital Input using a button doesn't work properly when using it to control a relay

I'm trying to control a relay both via Bluetooth and using a switch. The problem is that, when the LED is off, I can turn it on with the switch but then if I turn off the switch the relay will stay on....
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1answer
47 views

Recommend an Arduino Uno shield to monitor the state of 5 DPDT electrical switches

I have a project where I need to monitor the state of 5 DPDT electrical switches with Arduino Uno. Also, the Arduino board will be measuring the output from 3 thermocouples on 3 of the analogue pins ...
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1answer
43 views

Is it possible to use a slide switch without a resistor?

I understand how pullup and pulldown resistors work with push buttons and I also understand that an analogous idea can be applied to slide switches. Furthermore, I know that some versions of Arduino ...
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2answers
999 views

I need a simple, low power, low cost wireless switch to transmit to Arduino

I'm looking for a very simple wireless, low-power, low-cost switch that can transmit a signal to an Arduino. Ideally, each transmitter would have a signature. For instance, let's say I had 4 different ...
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1answer
75 views

Float switch is not detected

Good day everyone, forgive me for the shabby drawing I am just panicking, why my float switches are suddenly undetected by my Arduino mega. I've tested all the float switches one by one to confirm if ...
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1answer
41 views

How do I write a program that turns on both on board LEDS ONLY when BOTH switches are ON [closed]

int btn1=0; int btn2=0; void setup() { // put your setup code here, to run once: pinMode(GREEN_LED,OUTPUT); digitalWrite(GREEN_LED,HIGH); pinMode(RED_LED,OUTPUT); digitalWrite(RED_LED,HIGH)...
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2answers
273 views

Write a condition to execute 2 switch-case functions?

I'm new to programming and using Arduino products, and was wondering if someone wouldn't mind assisting me with a project I'm trying to tackle? If you review my code below, I have 3 conditions within ...
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1answer
2k views

Arduino DC motor with 2 buttons

I have a problem with my Arduino project and I tried everything to fix it but nothing helps. I am trying to rotate my DC motor with two buttons: one button is to stop/start rotating on left side, ...
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1answer
604 views

Timer for Control Motor using Limit Switch

Im not good in arduino, but I have project that control motor using limit switch. The rule is: When switch OFF, motor ON When switch ON, motor OFF for 1 hour (i dont want use delay because cannot ...
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3answers
770 views

How to wire a three-pin on-off-on switch for reading input?

I would like to read the output of an on-off-on switch with my Leonardo board, but I have very little knowledge of electronics and don't know how to wire it up. This is the switch in question: E-...
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2answers
301 views

How to switch 12V with esp32?

Hello i want to switch electric door lock (12V, 170mA) with esp32(3.3V). If is it possible I want use tranzistor. I tried to use IRF520, but it only worked with 5V. My sugestion is use 2 tranzistors ...
3
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1answer
62 views

Water level switches / reed switches and Arduino Uno

How could I estimate the max number of switches that I could connect to an Arduino Uno? I am questioning if Arduino has enough power to simultaneously operate an X number of switches with no issues. I ...
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2answers
86 views

Stuck In While Loop

So I'm a beginner at Arduino and I have to light up an LED grid to show digits from 0-9. I wrote a bit of code (with the help of some people) and it's like 90% done but there's this ONE problem. I ...
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1answer
35 views

Connecting LEDs and push buttons 12 feet away from Arduino UNO

I have a PCB (let's call it remote PCB) on which I have 4 LEDs and 4 buttons mounted. The remote PCB is far away from my desk (about 12 feet away). The LEDs are used to indicate the status and the ...
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2answers
112 views

2 way switch with Arduino?

Hey I'm working on a home automation system where I can replace one of my 2 way switches to an Arduino Or node MCU controlled one but I want to avoid normal relays because as of what I know they can ...
4
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1answer
141 views

Turning off a LED

I am trying to make 2 alarms for 2 different times using 2 LED's which should turn on when the time corresponds to the set time and then if a pushbutton is pressed, the LED should turn off. For the ...
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1answer
39 views

Switching 4.2V circuit with 3.3V Arduino GPIO

I am trying to learn about MOSFETs and see this p channel MOSFET and this tutorial. I am trying to use a 3.3V arduino GPIO pin to control a load that is powered from a 4.2V battery in much the same ...
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1answer
53 views

Arduino UNO With On / Off Module Switch + Battery Advice

So I have the following connected and the programming works fine when connect by USB The Parts 1 Arduino UNO 1 Laser Module (KEYS) 1 Rocker Switch Module (Standard 3 PIN) 2 Variation Motors (KEYS) 1 ...
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2answers
2k views

Need Help in circuit diagram of 8*8 reed switch matrix

I am designing 8*8 reed switch matrix which will be connected to Arduino. I am using Arduino Duemilanove. I have completed the matrix portion but don't know how to connect and where to connect the ...
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0answers
55 views

Single LED controlled by two pushbuttons - one of which acts like a toggle switch

Trying to control this LED with those 2 pushbuttons - one button that starts a short flashing sequence, another pushbutton acts like a toggle switch, one press bulb is on, another press bulb is off. ...
2
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1answer
52 views

Arduino changing output based on wire voltage

I’m new to arduino and I want to build myself smart switch that can be turned of both manualy and via wifi, is there any way to change position of relay based on if another wire is live or not? Im ...
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0answers
26 views

how to control switch (proteus) using bluetooth card (HC-05) and arduino?

This is the first time I use the Internet with the Arduino in the proteus , What are the stages that I must follow in order to be able to control the switch via Bluetooth? If it was possible to ...
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2answers
36 views

Switching time of a multiple input switch

I basically have two switches Both switches will be pressed simultaneously in different order I want to know which switch was pressed first
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1answer
36 views

Switch loops with SPDT switch

I have made a drone/car quadruped robot thing and I need help with the code. I have found two codes to use to control each aspect of it but I need help to connect them. I have made a radio controller ...
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2answers
369 views

LCD screen won't stop printing the same characters twice

I'm hoping that someone might be able to help me figure out how to prevent my LCD from giving me double digits (i.e. 55, 66, 77 - instead of 5,6,7); I have 2 functions that are printing, so I'm ...
2
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1answer
70 views

status whether the switch is connected to arduino or not?

I made a small circuit in which a push-button is connected to Arduino via a pulldown resistor. So, whenever it is pressed it connects to 5V otherwise pulled down to the ground. this is working fine ...
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2answers
4k views

digitalRead not reading input pin of ESP8266-01

I am trying to use a on-off switch with the ESP8266 to change whether GPI02 is HIGH or LOW. I am using GPIO3 as input. My circuit looks like this: The red area to the right is a relay, I wasn't sure ...
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2answers
201 views

How to toggle LED and motor on button press?

we want to have a LED turn on with the press of a button, and become brigther and brighter as times go by (whithin a defined time frame), and when it reaches maximum brightness to turn off for a ...
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3answers
708 views

using a switch case with a 5-position switch and serial output

I'm trying to get started on developing a menu system for my LCD1602. I have a Parallax 5-position switch (up,down,left,right,center) and I would like to interface the two. I've been trying to get ...
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1answer
78 views

Trying to switch a 5v fan with a LiPo and can't figure our what's wrong at full duty cycle

I have a simple project where I want to turn a 5v fan on/off and both the MCU and fan will powered by a LiPo battery. I'm powering the ESP and fan directly from the battery in the attached circuit. ...
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3answers
7k views

How to use this 3-pin slide-switch?

I purchased these slide switches recently because I want to use them in my project: But I don't know what to connect up the three pins to and I can't find any information about them online. Nor can ...
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0answers
138 views

multiple button switch case how to add counter [duplicate]

I want to add counter in multiple-buttons-to-control-relays: int relay1 = 23; int relay2 = 25; int relay3 = 27; int relay4 = 29; int relay5 = 31; int relay6 = 33; int relay7 = 35; int relay8 = 37; ///...
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1answer
298 views

Switch Statement stuck in loop

I am writing a code for a user to enter a 4 digit pin, then use this pin later to unlock a box. The loop is stuck between the "ready to unlock box" and "enter pin" it just keeps flipping between ...
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1answer
58 views

How to use this Toggle Switch?

I purchased this toggle switch recently because I want to use it in my project: But I don't know what to connect up the three pins to and I can't find any information about it online. Nor can I find ...
0
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1answer
25 views

Correct position for buttonState in my FSM

I wrote a FSM with the help of some tutorials through out the world wide web and so far it does what I want to do with it. But one thing that is not the way I want to be, is to exit the state ...
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1answer
136 views

How to code an arduino to execute a particular code using a slide switch

I’m pretty new to arduino. I need help concerning a project I’m making. I’m using a SPDT slide switch to switch between what code(method) should be executed.i.e when I shift the switch to the left, ...
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1answer
54 views

How can I make my Arduino Esplora program start on the press of a button and then continue to run without me having to hold the button down? [closed]

I am trying to create a program where the main code starts on the press of a button. I am using an Arduino Esplora, and I want to have the built-in LED be blue when I plug in the power until I press ...
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1answer
84 views

Sketch starts and keeps counting on external power supply but not usb

Thank you for the add, total newbie here (electronics and arduino) on his first project. Trying to make a counter for a hay baler with two HAL effect sensors, (pin 5 & 6) and outputting to an I2C ...
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0answers
67 views

What is the best way to replace the buttons inside a car remote chip so that it can be controlled via Arduino?

I have a car remote that looks like the following I would like to replace the buttons with some sort of switch or relay that can be programmatically controlled via an arduino unit. Would a simple ...
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1answer
189 views

How to control RC power switch with Arduino-/Adafruit-Board?

I want to control (switch on/off) a solenoid valve via an RC power switch and an Adafruit M0 Feather Bluefruit LE. The RC power switch is this one, and this is the Adafruit Board Pinout. My ...
2
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1answer
10k views

Button with switch timer and reset time function + LED feedback. What am I doing wrong?

Beginner here. I´ve been trying to implement a button function timer working with millis() instead of delay as I want the button to be responsive while the timer is running. So far I´ve managed to ...
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1answer
90 views

Running in loop or once according to a slide switch position

I have a question. I made a system which includes a servo, a stepper and a wiper motor :) All these parts has one job to do and I can code it. But, I want to make 2 modes in this system Single ...
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0answers
42 views

default in switch doesn't appear to execute

I have a situation where the default case in my switch statement doesn't appear to execute as expected. I wonder if there is some subtlety I'm missing here? Given the following enum: enum ...
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0answers
32 views

ESP8266 connected to a HIGH pin and DPDT only works sometimes. Works everytime if connected to 3V3 pin

I have a Wemos D1 Mini hooked up to a DS2Y-S-DC3V DPDT switch. When I have the coil ends are hooked up to a pin (D2) and ground, it will click when I set the pin HIGH. It should click again when it ...
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1answer
44 views

Control 4 digital outputs with one switch

I want to control 4 digital outputs (d0, d1, d2, d3) with one switch. When the Arduino starts, they should all be in state LOW. Now, after pressing the button once, d0 should get HIGH. Another push ...
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0answers
135 views

Made a light controller for the holidays

I am a new the world of Arduino. I found on YouTube, how to build a light controller (https://www.youtube.com/watch?v=WvG9c84ApFA&t=39s). I follow every step but it doesn't work. Here are some ...
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0answers
1k views

Nested "switch" statements menu

I know that menus were discussed perhaps a thousand times here and everywhere. But using a ready solution is not something that I'm looking for because I know I won't learn the concept if I use them. ...
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1answer
1k views

Arduino Uno Motor control using 2 Relays, 2 Limit switches and Bluetooth. Forward Reverse Stop

Modified existing project from this link: Problem : Trigger limit switch to stop DC motor I modified this code to control two relays which are wired to motor poles for Forward or Reverse movements ...