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Arduino relay not working

Relay module not working. Ask Question Asked 1 year, 11 months ago. Active 1 year, 11 months ago. Viewed 187 times 1. I used 2 relay modules. One single channel 5 volt and another 2 channel 5 volt. On connecting 5v of arduino uno the relay modules arent getting on(led on modules not on). 2 channel once worked with 9volt dc adapter supplying to arduino board.By work i mean the led on relay. 5v relay module not working with dc adapter [closed] Ask Question Asked 1 year, 5 months ago. Are you using the charger to run the Arduino or not? Please edit your post to make this more clear. A schematic would be helpful too. \$\endgroup\$ - mike65535 Jun 20 '19 at 13:36 \$\begingroup\$ @mike65535 read now. \$\endgroup\$ - Ashja Jun 20 '19 at 13:39. add a comment | 2 Answers Active. Learn how to use relay with Arduino, how relay works, how to connect relay to Arduino, how to code for relay, how to program Arduino step by step. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. Find this and other Arduino tutorials on ArduinoGetStarted.com Fixing not working Arduino / nodemcu 5V relay module - funny and unexpected - Duration: 5:59. Electronic Noob Blog 8,279 views. 5:59 #18 Add a Relay Module to your Arduino project - Hints, Tips. I said that today the physical dimension, as you can see it here, we have three connections here that can be connected to Arduino for control and power purpose. We have three terminals here, this one, the middle one is positive. The other side is negative. If you can see it here, they [

arduino uno - Relay module not working - Arduino Stack

That means the relay electromagnet is directly powered from the Arduino's power pin, so the relay module and the Arduino circuits are not physically isolated from each other (this is the configuration we'll use). Without the jumper cap, you need to provide an independent power source to power up the relay's electromagnet through the JD-VCC pin. That configuration physically isolates the. A simple project, in which Arduino UNO controls a 5V relay is explained here. The working of the project is based on the functioning of the Relay and the ability of Arduino to control the relay. Let us discuss the working of the project. As mentioned earlier, by interfacing Arduino with 5V relay module, we intend to operate an AC load like lamp. Instead of using it directly, we designed a. - A relay is not the same thing as the Relay module you are using here. I came to this page looking how to hook up the relay (just the component, so this post doesn't help me much). No relay (as a component) has a signal pin on the coil side, just two pins (which then need additional circuitry for load and spikes regulation). This is a big disinformation - try to change this NO pin is normally open pin and device attached to this pin will not work if the relay is not energized. COM is a common pin i.e. ground pin. NC is normally closed pin and device attached to this pin will start working even if the relay is not energized. 7. 2 Relay Module Compatibility. 2 relay module is compatible with different micro-controllers

arduino - 5v relay module not working with dc adapter

  1. Relay is clicking but 5V DC motor not working unless directly connected to arduino. I have tried using both normally open and closed with the common on the 4 way relay module I have. I have two (will be four when done) 5V DC water pumps that will power sufficiently when connected directly to the vcc and ground of the arduino
  2. Working is simple, we need to make the RELAY Pin (PIN A0) high to make the Relay module ON and make the RELAY pin low to turn off the Relay Module.The AC light will also turn on and off according to Relay. We just programmed the Arduino to make the Relay Pin (A0) High and Low with a delay of 1 second
  3. The working of a relay can be better understood by explaining the following diagram given below. There are 5 parts in every relay: 1. Electromagnet - It consists of an iron core wounded by coil of wires. When electricity is passed through, it becomes magnetic. Therefore, it is called electromagnet. 2. Armature - The movable magnetic strip is known as armature. When current flows through.
  4. The Arduino is actually powered on via the FT232 adapter then via USB on a 1A power supply. I've seen that, if I remove the JD-VCC the relays are not working as expected, but the leds on the relay board, that are showing if the relay is on/off are working correctly. I mean, if I dont give power to the JD-VCC the board is working well without.
  5. Fixing not working Arduino / nodemcu 5V relay module - funny and unexpected - Duration: 5:59. Electronic Noob Blog 7,461 views. 5:59. ESP8266 and Relays - Unsolved Mystery - Duration: 17:48.
  6. Controlling DC Devices using Arduino Relay Module. In the first part, we will control a led using the relay and in the second part we will control a high voltage device using the relay. Controlling a DC device is easy as compared to the AC device. For controlling the DC device, you do not require an external supply until you are controlling a small voltage device like LED which runs on up to.
  7. Watch the latest video for this 5V relay: https://youtu.be/g6k8sPJyif8 This video shows you how to use 5V relay module for Arduino. First the 5V 1 channel re..

Controlling AC Light Using Arduino With Relay Module: Hello friends! I'm Ostin,I ll demonstrate how to control a AC light with Arduino using relay module.It is a simple project and also very dangerous as we are going to deal with high voltage 220v . Do not attempt if you are a amateur in dealing wit Circuit Diagram and Working: In this Arduino Relay Control Circuit we have used Arduino to control the relay via a BC547 transistor. We have connected transistor base to Arduino pin A0 through a 1k resistor. An AC bulb is used for demonstration. The 12v adaptor is used for powering the circuit. Working is simple, we need to make the RELAY Pin (PIN A0) high to make the Relay module ON and make. Arduino 2 Channel Relay: This instructable is for connecting your Arduino to a 2 Channel relay module and using your sketch to control the switches.I bought the 2 Relay Module on eBay (for $9.50) to drive a couple of 240V parts (a vacuum cleaner and a rotary engraving tool

This video shows you How to use 2 channel relay to control AC and DC loads in Arduino. The best thank you for me is to not skip ads and Subscribe 🔔 to my cha.. Arduino relay - Blinking of a lamp. Here is the list of the elements we will be using in this project. 1 x Arduino Uno board; 1 x Relay board; Cable with socket and plug; Jumper wires; 230V lamp; The relay is a small device that can control up to 230V devices. Inside of it, there are electromagnets with a contact that closes the circuit when you apply voltage to it. I have a 2 channel relay.

Arduino and Android Bluetooth Relay Control (Tutorial

Video: Arduino - Relay Arduino Tutoria

WORKING PRINCIPLE OF RELAY: It works on the principle of an electromagnetic attraction. When the circuit of the relay senses the fault current, it energises the electromagnetic field which produces the temporary magnetic field.This magnetic field moves the relay armature for opening or closing the connections. The small power relay has only one contacts, and the high power relay has two. So I've wired up a relatively simple circuit where an Arduino controls a solid state relay that is connected to a 12V 30A power supply which runs a solenoid valve. I'm using the an Arduino Mega 2560 a Gem Sensors solenoid valve and a Broadcom Limited ASSR-1511-001E solid state relay. On the input side I have

Relay not working. I'm attempting to hookup a 5v relay to turn on and off an led strip. Arduino is wired up correctly to the relay and I am able to confirm that I am sending on/off signals to the relay. I've also confirm that the LED strip can be powered directly by the 12v wall wart. I've hookup up a 12v power source to the relay, hot to the center pin and ground to the LED stripe. Neither. Arduino water pump with relay not working [closed] Ask Question Asked 3 years, 5 months ago. Active 3 years, 5 months ago. Viewed 4k times 0. 1 \$\begingroup\$ Closed. This question needs details or clarity. It is not currently accepting answers.. Arduino self shutdown using relay not working. Ask Question Asked 3 years, 8 months ago. Active 3 years, 8 months ago. Viewed 1k times 1. I'm working on a project that need to shutdown arduino main power (not sleep) to save battery. Follow this tutorial: zola lab. Here is Zola scheme (i choose the relay option): And here what i have done:. Arduino not working for a 5v relay. Hi guys! I'm using an arduino uno to work a 12v motor, it seems it's not enough voltage or amperage to work the bridge on the 5v relay, any ideas on how to pump it up a notch? 7 comments. share. save hide report. 57% Upvoted. This thread is archived. New comments cannot be posted and votes cannot be cast . Sort by. best. best top new controversial old q&a. Also you do not tell us what happens if you make the output pin high. e.g. is it working inverted. \$\endgroup\$ - Oldfart Jun 2 '18 at 10:33. 1 \$\begingroup\$ 1) I think you have the wireing wrong. The relay has a coil with 2 pins that you connect to the arduino and 2 or 3 pins for the switch depending on model. So you would connect either the 5V or the GND but never both. 2) The relay.

If you drove the relay directly from the Arduino pin and simply added resistors to limit the current down to 20mA, you would likely not have reliable operation (or no operation) of the relay. We use the transistor as a switch to switch the 12V supply to the relay coil with as much current as needed (limited by the relay coil resistance) Arduino 5v pin - Relay module VCC pin . Arduino GND pin - Relay module GND pin. Arduino pin#7 - Relay module IN1 . Arduino pin#8 - Relay module IN2. After we finish connecting the motor, all we need to do is power the relay switch module itself. using the arduino, we can connect the wires and send signals to activate the relay switches

I'm working on a project where I use midi notes to switch 8 old lamps using the Arduino Uno. I've built a case with 8 wall sockets that are linked up to a relay board for the Arduino. I am using the Hairless midi serial bridge to send midi notes via USB to the Arduino. This all works until I put power on the sockets with my Uno. After about 5. One of the most useful things you can do with an Arduino is control higher voltage (120-240V) devices like fans, lights, heaters, and other household appliances. Since the Arduino operates at 5V it can't control these higher voltage devices directly, but you can use a 5V relay to switch the 120-240V current and use the Arduino to control the relay 4) Separate multi-relay 5V modules high triggered and low triggered 5) Separate multi-relay 12V modules high triggered and low triggered 6) Modifications for Driving a 5V relay module from a 3.3V Arduino board 7) High/Low Triggered Relays for Use with 3.3V boards, e.g. ESP8266-01 8) FET Sheilds 9) Solid State Relays Finally there small section on Help My Relay Stopped Working (RC Snubbers After that i started thinking that maybe i deleted preloader code which was on esp-01 originally when i received it and replaced it with first code i used for 1ch relay. Please for your help and steps what to do. type of relay Onboard ESP-01 WiFi modules and high performance microprocessor STM8S103

Arduino relay module problem - YouTub

Instead I was thinking to the problem of the relay working at 12 VCC In this case you can use - I think you have - a separate VCC voltage to drive the relays, i.e. ULM2003 with obviously the common GND with the board. So when you enable the darlington with the low VCC the external 12VCC closes the circuit and click the relay. It's a bit complicated as you add one more component but you save. To connect the 4 Relay board to an Arduino is very easy and allows you to turn on and off an wide range of devices, both AC and DC. The first to connections are the ground and power pins, You need to connect the Arduino +5v to the 4 Relay board VCC pin and the Arduino ground to the 4 Relay board GND pin. Then it's a only a matter of just. Arduino sketch to handle relays, primarily lights. Contribute to lkankowski/arduino-multi-relay development by creating an account on GitHub

This video shows you How to use 2 channel relay to control AC and DC loads in Arduino. The best thank you for me is to not skip ads and Subscribe 🔔 to my cha.. Arduino can control the pump via the relay. If you do not know about relay (pinout, how it works, how to program), learn about relay in the Arduino - Relay tutorial . Wiring Diagram. Image is developed using Fritzing. Click to enlarge image. Arduino Code. The below code repeatedly turns the pump ON in five seconds and OFF in five seconds, /* * Created by ArduinoGetStarted.com * * This. By using this Arduino Variable timer relay we can control high voltage electrical appliances or electronic devices. To indicate the time duration and status 16×2 LCD display is included in this design, once the program uploaded to the Arduino then it can work independent with some external battery power source. Connection Diagram. Construction and Working In this project arduino uno board is. Relay Module Library. For Arduino boards. The Library implements a set of methods for working with a digital relay module. Relay modules are assembled units commonly included with Optocouplers, diodes, LED's, transistors, etc.. So, for the Arduino interfacing we just have to connect a supply voltage, GND and input signal connection. Installatio Working. When current flows through the coil of the relay, a magnetic field is created that causes a ferrous armature to move, either making or breaking an electrical connection. When the electromagnet is energized, the NO pin is the one which is on and NC pin is the one which is off. When the coil is de-energized the electromagnetic force disappears and the armature moves back to the original.

arduino 5v relay not working

ESP32/ESP8266 Relay Module Web Server using Arduino IDE (1, 2, 4, 8, 16 Channels) This tutorial is a step-by-step guide that covers how to build a standalone ESP32 or ESP8266 NodeMCU Web Server that controls any relay module. We'll create an ESP32/ESP8266 Web Server that is mobile responsive and it can be accessed with any device with a browser in your local network. Introducing Relays. A. Working with the digital relay to control high voltage can be hard to understand. There are no instructions on how to make this perform with an ARDUINO. I created this so people will be able to use the relay with a standard 110 volt house outlet in either NO - NORMALLY OPEN or NC - NORMALLY CLOSED modes. As always working with high voltage is dangerous so be careful. If you do not understand.

I used a pre-assembled arduino relay module for this task. Input of arduino relay board is connected with arduino uno and out put to fan. I hope you people know how to make relay connections. If no just see the below arduino circuit diagram. Arduino Ethernet shield web controlled fan. Arduino Ethernet shield web controlled fan - Project code . Lets start the project code. First i included. 1 Channel 5V Arduino Relay Module for Arduino PIC AVR DSP ARM. Single-channel relay, a wide range of microcontrollers such as Arduino, AVR, PIC, ARM and so on can control it.The 5V relay module circuit, each one needs 15mA-20mA driver current and equipped with high current relay: DC 30V / 10A, AC 250V / 10A.This one channel module has a standard interface that can be compatible with a. They are often used to interface an electronic circuit (working at a low voltage) to an electrical circuit which works at very high voltage. For example, a relay can make a 5V DC battery circuit to switch a 230V AC mains circuit. A relay switch can be divided into two parts: input and output. The input section has a coil which generates magnetic field when a small voltage from an electronic. r/arduino: A place for all things Arduino! Press J to jump to the feed. Press question mark to learn the rest of the keyboard shortcuts . r/arduino. log in sign up. User account menu. 2. Code not working. Close. 2. Posted by. u/StrBr. 5 months ago. Code not working. I will write this simple because i am on my phone in bed ready to pass out. I was making simple relay timer...push a button relay.

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Guide for Relay Module with Arduino Random Nerd Tutorial

Fully Working Home Automation With Arduino UNO 4 Channel Relay & Bluetooth (No Programming Needed) Rated 4.80 out of 5 based on 15 customer ratings (17 customer reviews) Rs. 1,999.00 Rs. 1,349.00. Fully Programmed Arduino Uno; Just make the connections and operate; Circuit Diagram and Extra Jumper Wires also INCLUDED! Superfast DELIVERY in 1-4 Day s ; 24Ă—7 Support by HARSH SHARMA (owner) over. In this article, we are going to see how to work with a Bluetooth module with a relay and Arduino to produce a wireless mobile controlled light. This will make our life simple and efficient. The Bluetooth module is paired with a mobile's Bluetooth and using a specified app we are going to control the lights and fan. This project will be very useful for ill patients and will be a stepping stone. Arduino UNO: As mentioned in the project introduction, a microcontroller is used to drive the relay. Hence, Arduino UNO, which is an ATmega 328P microcontroller based prototyping board, is used in the project. Relay: A relay is a type of switch that provides connection between a low power circuit and a high power circuit. Electromechanical relays are the most commonly used relays and consists. Check the relay is turning ON and OFF in 1 second intervals (also the LED of relay module will turn ON and OFF) If it is not working, suddenly turn OFF the Arduino. Then check for any misplaced connection. Once resolved, re-power the Arduino. Wow! It works. Now we need to make the circuit on a general purpose PCB or custom PCB

How to use 5V Relay on Arduino - Electronics Hu

The LORA receiver circuit will receive the signal from the LORA transmitter circuit and accordingly control the Relay module. Working Principle. Transmitter circuit: In the transmitter circuit, the RX pin of the Arduino is connected with the TX pin of the LORA module through a voltage divider. As the Arduino sends the signal at 5V logic level but the RYLR896 Lora module can receive the signal. Relay interfacing with microcontroller . Microcontroller do not have considerable amount of current to operate relay. Relay coil needs minimum 10mA current to energize. But microcontroller output pint can provide maximum current up to 1-2mA. To resolve this problem relay driver circuits are used between microcontroller and relay. Solid state relay When installing the relay above a Arduino Uno, If you are not sure how to connect an electrical appliance working on 120 - 220V network to the relay, or if you have doubts and questions about how it is done, STOP. This voltage level can easily start a fire or end your life. Please make sure that you have a full understanding of the principles behind the relay and the dangers that are. Search for jobs related to Arduino 5v relay not working or hire on the world's largest freelancing marketplace with 18m+ jobs. It's free to sign up and bid on jobs Relay vcc to arduino vcc! Relay gnd to arduino gnd! Relay IP to arduino 7! Output LOW to 7 and delay(5000) and output HIGH to 8 and delay(5000) in loop. Red light in module glows at high - abdul rahuman Nov 16 '15 at 14:4

This opto isolation does not complete if the JD-VCC and the VCC are joined by a Jumper, as is the default case when you receive your 2 Channel Relay. This jumper can be used to test the working of the relay and to test if it is working and functional, if you just connect its VCC and GND (of the right hand side of the image) to 5V, and Gnd on the Arduino, and then just connect another port of. Arduino Relay not working. Arduino Relay not working. Saved by Sultan Morbiwala | Robotics & Mechatronics Engineer. People also love these ideas. The relay module has a TTL interface - VCC, GND and one signal per relay to switch it on/off. These you should connect to the coresponding pins on your arduino(as you probably did). Each of the relays have three screw terminals. When you switch the relay ON, two of those terminals will be connected through the relay NO-CO Include the complete, presently not working, arduino code. Like Reply. Thread Starter. Gary Clarke. Joined Sep 11, 2019 18. Sep 17, 2019 #28 AlbertHall said: How are you driving the relay coil from the arduino pin? Which arduino pin are you using for the relay? Include the complete, presently not working, arduino code. Click to expand... Solved, turns out that the sensor gives a different. IR remote receiver not working while relay is HIGH. Ask Question Asked 4 years, 7 months ago. Active 4 years, 7 months ago. Viewed 364 times 0. I'm newbie with Arduino, I have just one week of research. I brought I starter kit and done the example projects. Now I'm trying to create one on my own. But I'm having troubles: I could manage to make a example of controlling a LED using IR remote.

Delays are not working the way I want them to. Hi Everyone! A few days ago I posted a project that I'm working on for 3 phase motor switching. I have my code working properly for everything but I do have one minor hiccup. I'm trying to write code that when the forward relay is latched and the reverse button is pressed the following should happen. fwd relay latched reverse button pressed fwd. Working Explanation. A relay is basically an electrical switch that is operated by an electromagnetic switch. It can be turned on or off allowing the current through the circuit. Arduino pins provide a low voltage which is only 5V to the relay module to control it. The relay module has three low voltage terminals i.e VCC, GND and Signal. Working and concept of Relay; Switching by relay. Relay and Arduino; Motor control by Relay on Arduino; 1.2 Switching by NPN Transistor. make the following circuit. When you give High signal on Input it connects the LED to GND. Here we are taking HIGH input by push button switch. 1.3 Relay: Following Video of Robo India explains working and.

How to Set Up a 5V Relay on the Arduino - Circuit Basic

Thus the switch plays an important role in the relay working. As it is a part of the load circuit, it is used to control an electrical circuit that is connected to it. Thus, when the electrical relay in energized the current flow will be through the pins 2 and 4. Energized Relay (ON) De - Energized Relay (OFF How to control several roller shutters with inexpensive relay boards (not ruining them) with physical buttons and remotely simultaneously. Blinds (Or Any AC Power Motor) Control. Project tutorial by gomecin. 31,871 views; 41 comments; 97 respects; Controlling a car using a Pebble watch, an Android phone and an Arduino. Smartwatch car remote. Project tutorial by Mika Wee. 21,934 views; 20. This relay module is 5V active low. It is an 8-channel relay interface board, which can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, PLC, etc. It is also able to control various appliances and other equipment with large current. Relay output maximum contact is AC250V 10A and DC30V 10A Control a Relay with Arduino and Hall Effect Sensor. The circuit diagram for controlling a 5V Relay Module with Hall Effect Sensor and Arduino is shown below. Code. Working. The working of this circuit is very simple. Whenever the Hall Effect Sensor is subjected to a magnetic field, it toggles the Relay (as per the code). Applications of Hall. Relay module for Arduino is one of the most powerful application for Arduino as it can be used to control both A.C and D.C devices by simply controlling the relay by giving 5V. A relay is basically a switch which is operated electrically by electromagnet. A relay can be used to control high voltage electronic devices such as motors and as well as low voltage electronic devices such as a light.

There's a separate version of the same demo for each library. Bounce1/Bounce2 are not required for the library, just for the demo program. Note that Bounce1 needs to have WProgram.h changed to Arduino.h in Bounce.cpp if compiling under Arduino 1.0+ IDE. Bounce2 is 1.0+ Compatible as is Electromagnet: An Electromagnet plays a major role in the working of a relay. It is a metal which doesn't have magnetic property but it can be converted into a magnet with the help of an electrical signal. We know that when current passes through the conductor it acquires the properties of a magnet. So, when a metal winded with a copper wire and driven by the sufficient power supply, that. Arduino Relay; Table of content. Relay in Arduino; Relay in Arduino . Relay is an electrical switch component that is used to control load which requires more power and also the devices which can not be directly run by the power provided by digital or analog circuit boards. Add image here.. Basically a relay is made to work as a switching component when a very small voltage is triggered into. Controlling a Relay Module with the ESP32 - Arduino Sketch. The code to control a relay with the ESP32 is as simple as controlling an LED or any other output. In this example, as we're using a normally open configuration, we need to send a LOW signal to let the current flow, and a HIGH signal to stop the current flow. The following code will light up your lamp for 10 seconds and turn it. Here is How To Troubleshoot Servo Not Working With Arduino. The tools needed to check a servo is not easy to reach by a common hobbyist. Not all the hobbyists has huge knowledge around PCB inside the servo. Except genuine Arduino board, nothing purchased which are Made in China or Taiwan has warranty. Troubleshoot Servo Not Working With Arduino

2 Relay Module Interfacing with Arduino - The Engineering

Relay is clicking but 5V DC motor not working unless

If ESP8266 board is not installed in your Arduino IDE follow this step. If you are at all uncomfortable or inexperienced working on these projects (especially but not limited to electronics and mechanical), please reconsider doing the job yourself. It is very possible on this project to damage your cottage, void your property insurance, create a hazardous condition, or harm or even kill. The relay module is an electrically operated switch that can be turned on or off deciding to let current flow through or not. They are designed to be controlled with low voltages like 3.3V like the ESP32, ESP8266, etc, or 5V like your Arduino. On top of relay modules, you will see channels which are the black cube as seen above Even though the Relay Coil needs a small current in order to get energized, driving it directly from Raspberry Pi (for that matter, any Microcontroller like 8051 or Arduino) is not a good idea. A simple way is to drive the Relay Coil through a Transistor. The following image shows the connections required with respect to a Relay Arduino Bluetooth Relay 4CH App is android application which is used to control 4 channel relay module via Bluetooth with Bluetooth serial communication module support HC-05, HC-06, or HC-07, Using Arduino or AVR i am test with arduino UNO and serial commnunication library to connected RX pin 10 and TX pin 11. you can use arduino uno or arduino leonardo etc.. Working Principle of Arduino and Using it as a Tool for Study and Research. July 2018; DOI: 10.5121/ijcacs.2016.1203. Conference: International Journal of Control, Automation, Communication and.

NOTES: If you want complete optical isolation, connect Vcc to Arduino +5 volts but do NOT connect Arduino Ground. Remove the Vcc to JD-Vcc jumper. Connect a separate +5 supply to JD-Vcc and board Gnd. This will supply power to the transistor drivers and relay coils. If relay isolation is enough for your application, connect Arduino +5 and Gnd, and leave Vcc to JD-Vcc jumper in place. 3 www. If you are interested in finding out more about the Relay, you can check our Arduino Tutorial on How to Control High Voltage Devices with Relay Modules and Types of Relay - Which one should use? Please exercise great care when working with mains voltages - if in doubt contact a professional such as a licensed electrician for help. For all Grove users (especially beginners), we provide you. Connecting the Relay to the Arduino . A relay is an electromechanical switch. It can be used to turn an appliance ON/OFF working on AC/DC. When the Arduino supplies HIGH voltage (5V) to the relay, it turns it on (the switch is ON), otherwise, it remains off. In this project, we used a 5V SPDT (single pole double throw) relay. One terminal of the relay coil is connected to the Arduino's digital.

Arduino Relay Control Tutorial with Code and Circuit Diagra

Arduino lesson - 1-Channel Relay Module « osoyoo

Arduino controlling a fan - YouTube2Temperature Sensor with LEDs Buzzer and Relay Arduino
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