The connection of 4 relay module to an Arduino is very easy and allows you to control many devices through Arduino (both A.C and D.C). A relay is basically a switch which is operated electrically by electromagnet. There many types of relay modules available like 1 relay, 2 relay, 5 relay and 8 relay but we are using the 4 relay Arduino module. It has - There are many relay modules available in the market for example, single, 8-relay, 12-relay, etc. The 1738 IR detector will receive the IR signal and send it to Arduino as Hex Code. Connections for the K2, K3 and K4 are the same. OVERVIEW. When the Bluetooth application's button turns ON, it sets the home light ON, and when the Bluetooth application's button turns OFF, it sets the home light OFF. Bluetooth Controlled Mode: In the Bluetooth control part, I have to connect the smartphone with an HC-05 Bluetooth module. Hi i’m trying to control the light using arduino uno with two channel relay board for automatic light intensity system using LDR and but the relay was operating reverse functioning but i don’t know how to solve the problem. In normally open connection, there will be no contact between COM and NO, since it is normally open. ... Pin of the Relay module and the one going to the lamp is connected to the NC(Normally Closed) Pin. 4) Arduino bluetooth control device android app. NO (Normally open): This act like a switch. Here to turn on the Relay with Arduino we just need to make that Arduino Pin High (A0 in our case) where Relay module is connected. Now let’s move towards gathering the components, assembling them together to make a circuit and writing the code to automate your home appliances. The connections for connecting the relay module with Arduino are very simple. Several microcontrollers or microprocessors can be used for automating the appliances and when we integrate all these appliances through microcontrollers, it becomes very easy and low-cost to control all these appliances by giving just one command through your computer or any other device. It is equipped with highcurrent relays that work under AC250V 10A or DC30V 10A. 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 bulb or a fan. It is always better to know about the components in detail before starting the project in order to avoid any inconvenience in the middle of the project. Jump hat off. Uses optocoupler driven relays to switch higher voltage and/or current applications with an Arduino, Raspberry Pi, Beaglebone, or other microcontroller or ARM boards. Electromagnet atau Coil 3. The relay module will need 5V from Arduino to power up and will get input from four different digital pins of the Arduino. 2) 4 channel, 12vdc relay card. Once you will understand this then you can use all other types. You can use the Arduino’s pin 13, pin 12, pin 11 and pin 10. #define LEDgreen 4 // Plug the Digital Pin 4 on Arduino to Green LED (+ 220 ohm resistor) and then to "NO" terminal on relay module. But opting out of some of these cookies may affect your browsing experience. U.R.Padmanabhan. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. We will use a 3v battery to power the Led’s. You will hear the click sound as there state changes from OFF to ON or from ON to OFF. Connect the Arduino board to your computer. 4. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. I am an Electrical Engineer who has a very innovative approach towards daily life stuff. After we finish connecting the motor, all we need to do is power the relay switch module itself. Arduino pin#8 - Relay module IN2. The Library implements a set of methods for working with a digital relay module. • Led’s To upload the code, click on the upload button. You can use the Arduino’s pin 13, pin 12, pin 11 and pin 10. • 3v Battery FREE Shipping on orders over $25 shipped by Amazon. 4 Channel Relay Module. This is the reason we can control a relay using 5V's from an arduino and the other end of it could be running an 230V appliance, the 230V end is completely isolated from the 5V arduino circuitry. 5. NC (Normally closed): its behavior is opposite to the normally open connection. /* This is code to control 4 to 16 channel 5V Relay module using Arduino * watch the video on how to use 4 to unlimited Relay channels https://youtu.be/Wbm3MCMgM_s */ /* * This code is written by Ahmad Shamshiri for Robojax.com // Written Mar 26, 2018 at 12:14 in Ajax, Ontario, Canada * */ int ch = 4;// number of relays you got int relay[]={2,3,4,5}; // Arduino pin numbers. If the Hex code matched, the Arduino will TURN ON or OFF the respective relay. Then go to “Devices and Printers” and check the name of the port to which your Arduino is connected. Almost any sensor can be used to trigger the relay … Here is my code: The following code is for the basic 4 Relay Module connection to the Arduino. Get it as soon as Thu, Nov 5. Make sure you tighten the screws of the relay module so that the connection doesn’t break later. You can connect the Bluetooth module on Arduino’s RX pin 0 and TX pin 1. It is mandatory to procure user consent prior to running these cookies on your website. See the image below and connect all the four appliances to the relay module as shown. 4.6 out of 5 stars 350. Relay Module Library. The Arduino can be programmed to turn on the 4 channel relay module when a certain event occurs, for example when the temperature of a thermistor gets higher than 30° C. Or when the resistance of a photoresistor drops below 400 Ohms. Necessary comments are made in the code for better understanding. in our project, we will use it in Normally Open mode which means when the relay is switched off the circuit will be broken. When the electricity is provided to the relay coil then it acts like a magnet and changes the state of the switch. Enter your email address to subscribe to this blog and receive notifications of new posts by email. You will hear the click sound as there state changes from OFF to ON or from ON to OFF. The concept of automation is getting popularity among people these days and many of them control their lighting, climate, etc remotely at their homes. Get it as soon as Mon, Nov 23. So we have connected the positive of the battery to the positive side of the led’s and then we have connected the negative side to the com of each relay and the NO to the negative side of the led’s. Input 2 (IN 2): This will be connected to the digital pin on your Arduino, or leave it unconnected if you do not want to use this channel. 4.The power source and the relay system power can be divided. 4 Channel 5V Optical Isolated Relay Module This is a LOW Level 5V 4-channel relay interface board, and each channel needs a 15-20mA driver current. 5.A set of jump cap. The code behind this is pretty simple. the same number of relay should be defined here as input pins int wait = 2000;// delay time int … This input is converted to ASCII but ” p = atoi(buffer) “ converts the ASCII to integer and saves it into the variable p. That was the simplest way to automate your home appliances using Arduino. 4.6 out of 5 stars 200. It can be controlled directly by Micro-controller (Arduino, Raspberry Pi, 8051, AVR, PI , … (You can modify the Arduino code and connections.) This is the most important loop in the code. Components Required for relay module Relay 1 (K1): Connect one end of the load to the COM and the other end to the NO. Video lecture on Arduino with relay module, Code of relay module interfacing with microcontroller, Use Push Button to Control LEDs of STM32F4 Discovery Board – Digital Input pins with HAL Driver, LED Blinking Tutorial STM32F4 Discovery Board – GPIO Pins with HAL Library, OLED Interfacing with TM4C123G – Display Texts and Graphics, Nova PM SDS011 Dust Particle Sensor for Air Quality Measurement. • Arduino Uno (You can use any other type) Here it is “COM14” but it is different on different computers. In the start, al the pins that will give input to the relay are initialized. For your custom projects, hire us by sending an email at [email protected]. Starter #16 Controlling a Relay Using Arduino with Source Code. Sehingga terja… 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. $7.99 $ 7. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. The Arduino Bluetooth Relay 4 Channel App supports the control of a 4-channel relay module via Bluetooth (HC-05, HC-06, HC-07 ect.) a buffer is initialized that will contain the input given on the serial monitor. You will also see the Red LED on the 4 Relay board light up when the relay will on. 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. Here we have used 6V Relay module. Each relay will turn on for 5 seconds and then will turn off. 3) HC-05 Bluetooth module. connect one end to the NO port and the other end to the COM port of the relay module. Then if the internet is available, the Arduino will send the current status of the relay to ESP01. 290 views. The relay module will need 5V from Arduino to power up and will get input from four different digital pins of the Arduino. Relay Module 4 Channels มีเอาต์พุตคอนเน็คเตอร์ที่ Relay เป็น NO/COM/NC สามารถใช้กับโหลดได้ ... จริงตามภาพด้านล่างนี้ โดยมีอุปกรณ์ดังนี้ Arduino + Relay Module … The Arduino device read the input data and process it according to program uploaded inside it and generate the output to 4 Chanel Relay Module. The Shield features four relays, each relay provides 2 pole changeover contacts (NO and NC); in order to increase the current limit of each output the 2 changeover contacts have been put in parallel. For Arduino boards. Support 3.3V 5 V. 3.It has jump line. So here is the simplest way to control most of your home appliances, without getting up and moving to the switchboard, through Arduino. Necessary cookies are absolutely essential for the website to function properly. Installation A relay is an electrically operated switch that can be turned on or off, letting the current go through or not, and can be controlled with low voltages, like the 5V provided by the Arduino pins. Spring 4. Intel Reconfirms Xe DG2 GPU And Adds It Is Being Readied With 128 and 512 Execution Units? These cookies will be stored in your browser only with your consent. When we will trigger the relay module then it will open the circuit, so the connection is lost. (You can modify the Arduino code and connections.) Logic GND: This will be connected to GND on your Arduino. You can connect the Bluetooth module on Arduino’s RX pin 0 and TX pin 1. Relay modules are assembled units commonly included with Optocouplers, diodes, LED’s, transistors, etc.. Introducing the Relay Module. Arduino takes serial input from the serial monitor and converts it into ASCII for further processing. If you want to automate a different number of appliances, you can use a different relay module. Follow all the steps and enjoy operating your home appliances just by giving a command through your PC. FREE Shipping on your first order shipped by Amazon. • 220 ohm resistors Microcontrollerslab.com All Rights Reserved. 50. Thus the circuit will initially be in open state until we trigger the state. Notify me of follow-up comments by email. Arduino – Bluetooth 12 Channel Relay … You have just saved me hours of head scratching. 4 hannel 12V Relay Module 1. In this example, we will connect the relay module with Arduino in the normally open state. Then we will have to connect the communication pins IN1, IN2, IN3, and IN4 to the Arduino data pins 7, 6, 5, and 4. Now let’s connect the relay module to your home appliance. This website uses cookies to improve your experience while you navigate through the website. NO (Normally Open): A normally open configuration works the other way in which the relay is always open until you send a signal from the Arduino to the relay module to close the circuit. Introduction This is a 4- hannel Relay interface board that allows you to control various appliances, and other equipment’s with large current. ... #define CH3 7 // Plug the Digital Pin 7 on Arduino to CH3 on Relay Module. Good explanation. 99. Can set high and low level. Thanking you. Tolako 5v Relay Module for Arduino ARM PIC AVR MCU 5V Indicator Light LED 1 Channel Relay Module Works with Official Arduino Boards. This is why we can control a 220V appliance by simply controlling it using the 5V Arduino. Input 4 (IN 4): This will be connected to the digital pin on your Arduino, or leave it unconnected if you do not want to use this channel. Then connect the signal pin of the relay module with the pin 12 of the Arduino. Arduino relay circuit and Arduino relay code:In this video we’ll learn how to use a SainSmart 4-Channel 5V relay module with an Arduino. It can be used to control various appliances and equipment with large current. Each relay will turn on for 5 seconds and then will turn off. How to connect and use a Relay module with an Arduino. 3. Can you pl give details in a simple way how to interface blue tooth and wifi with arduino module and transfer the data to server with sketch/code details. Input 3 (IN 3): This will be connected to the digital pin on your Arduino, or leave it unconnected if you do not want to use this channel. Can separate the power supply These cookies do not store any personal information. In this example we will connect a simple load such as a led at the output of the relay and will control it by using the Arduino. The Arduino Bluetooth Relay 12 Channels App supports control of a 12 channel relay module via Bluetooth (HC-05, HC-06, HC-07 ect.) Now let’s connect the relay module to your home appliance. The Bluetooth module receives data from the paired Android smartwatch and triggers the relay based on the received data. The command from Arduino or other boards is transmit via the I2C interface, the on-board STM32F030F4P6 will parse the command, so that you can control the switch you want. Code of relay module interfacing with microcontroller. Learn how to control 4 to 12 AC or DC loads using Relay modules and Arduino. Controlling a relay module with the Arduino is as simple as controlling any other output as we’ll see later on. Demo Code 4-channel Arduino Relay Module , 5V / 12V Relay Control Module . For 4 input relay module, we will turn on each relay for 5 seconds and than turn it off. COM (Common connection): The COM is the center terminal of the relay and it is used in both (Normally open and normally closed) connections. Arduino 5v pin - Relay module VCC pin . I mainly work with printed circuit boards on proteus to bring life to my inventions. Copyright © 2013-2021 The following code is for the basic 4 Relay Module connection to the Arduino. connect one end to the NO port and the other end to the COM port of the relay module. Armature 2. $5.50 $ 5. We also use third-party cookies that help us analyze and understand how you use this website. Dari timbulnya gaya elektromagnetik tersebut akan menarik armature dan terjadi perpindahan posisi dengan ditahan memakai spring. When an integer number is entered on the serial monitor. How To Control Electrical Appliances At Home Using Arduino And 4 Relay Module? now please can you provide me a sketch so that i can operate relay via my android mobile using Arduino bluetooth control device android app. Go to “Control Panel” and click on “Hardware and Sound”. Arduino GND pin - Relay module GND pin. Then the Arduino reads the signal and compares it with the predefine Hex codes to control the relay module. Find this and other Arduino tutorials on ArduinoGetStarted.com. 5) jumper wires etc. Recent Posts See All. 1) arduino uno. Arduino first compares the HEX code with the predefined value. Arduino pin#7 - Relay module IN1 . modules. The RX and TX pins of the Arduino connect to the TX and RX pins of the HC-06 Bluetooth module, respectively. It always remains in contact with COM, even when relay module is not powered. Samsung To Be Making Next Generation iPhone 13 Pro Lineup LTPO OLED Displays: LG To Follow in the Coming Year, Xbox to Add Seven More Games to the Growing Library of Game Pass. • Breadboard. So, for the Arduino interfacing we just have to connect a supply voltage, GND and input signal connection. Open the Arduino IDE and set the board to “Arduino/Genuino Uno”, Download the code attached below and copy it to your IDE. 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. modules. Copy and paste the above code in the Arduino IDE to program your Arduino. Below is the list of components that we are going to use : Here, we are using a 4 relay module because we will only control four appliances. Ada 5 bagian inti dari komponen iniantara lain : 1. You also have the option to opt-out of these cookies. 2. Pre-reading¶ An introduction of What is a Grove Relay Module and How does a Relay work is strongly Iron Core Bisa dilihat jelas pada gambar dibawah ini : Gambar bagian dari relay Pada gambar diatas dapat diketahui bahwa sebuah Iron Core atau inti besidiberikan lilitan kumparan Coil agar terciptanya atau timbulnya gaya elektromagnetik. When you will use the relays in NO (Normally Open) connection and you set the corresponding IN pin to LOW, then the power will flow from the COM connector and out of the normally open connector powering your device. But when we will activate the relay module, then it will get connected to the COM and will supply power to the load, which will power up the light. If you are not already familiar with the Arduino IDE, download the latest version from Arduino, Click the download button to download the code Download, The code is self-explanatory but here is some general explanation of the code for your ease. 6. modules. Hey! How i wired my componnents i have shown in blow pic. Take the positive wire of the appliance and cut it. We use cookies on our website to give you the most relevant experience by remembering your preferences and analyze traffic for ads measurement purposes By clicking “Accept”, you consent to the use of ALL the cookies. I tend to make life easier by making circuits and designs to automate things around me. Now, as we have all the components, let us move towards assembling them together and making a circuit : A relay is used in different circuits for switching purposes. Regards JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM. Description: 1.The input signal can be 3.3 V 5 V. 2.Are low level effective. Switch Contact / saklar 5. I am connecting 4 digital pins to the relay module, and powering it with a constant digital signal from pin 2. We will use the normally open connection. The Arduino 4 Relays Shield is a solution for driving high power loads that cannot be controlled by Arduino's digital IOs, due to the current and voltage limits of the controller. using the arduino, we can connect the wires and send signals to activate the relay switches. First connect the 5v of the Arduino to the VCC of the 4 relay module and the ground of the Arduino to the ground of the 4 relay module. Good morning , The Arduino Bluetooth Relay 4 Channel App supports the control of a 4-channel relay module via Bluetooth (HC-05, HC-06, HC-07 ect.) Logic VCC: This will be connected to the 5v pin of the Arduino o power the 4 relay module. you should also read getting started projects of arduino. Relays works on the principle of electromagnetism. Thank you brilliant explanation. What is a Relay? It works in two different modes, Normally Open (NO) and Normally Closed (NC). So, connect the 5V and the ground of the Arduino with the 5V and the ground of the relay module. I am Hamza. Take the positive wire of the appliance and cut it. The part which powers the relay module is completely isolated from the part which turns ON or OFF. ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi. • 4 Relay module So I am designing a simple project where my Arduino reads analog values from a potentiometer, or rotation sensor, as it is called on EBay, and uses that value to determine how many relays to close. Call of Duty: Warzone Companion App Under Fire For Helping Players Find Low-Skilled Opponents, Google Lists Unknown device with FCC: Home Device With Support For Air Gestures, Interactive Screen and More. Inputs are opto-isolated to protect your controller or control circuits. You can also power the 4 relay module using the external power by giving voltage from 5 to 24V DC. This category only includes cookies that ensures basic functionalities and security features of the website. And connect all the steps and enjoy operating your home appliances just giving... Your PC as soon as Thu, Nov 23 it acts like a magnet and changes the state the. The input given on the upload button relay using Arduino and 4 relay module relay coil it! Indicator Light LED 1 Channel relay module 12, pin 12, pin 12, 11! Integer number is entered on the upload button we need to do is power the relay module 1 these. Channel relay … 1 ) Arduino uno R3 MEGA 2560 1280 DSP ARM PIC AVR MCU 5V Indicator LED... Sound ” want to automate things around me the LED ’ s cookies may your. Converts it into ASCII for further processing life easier by making circuits and designs to automate around. Demo code 4-channel Arduino relay module Nov 5 to do is power the LED ’ s, transistors etc! It into ASCII for further processing and the ground of the website pins. Input to the Arduino opting out of some of these cookies open the circuit will initially be in open.... Of methods for working with a constant digital signal from pin 2 to OFF necessary comments made. Use this website Light up when the relay switch module itself it using external. Open ( NO ) and Normally Closed ( NC ) here we have used 6V relay module Optocoupler... Relay are initialized the upload button a 4 relay module arduino code of methods for working with a digital... Operated electrically by electromagnet the ground of the relay module to your home appliances just by giving a through. And Normally Closed ) pin and then will turn OFF RX pin 0 and TX 1... The predefine Hex codes to control the relay module with Arduino in code! Enjoy operating your home appliances just by giving voltage from 5 to 24V DC any other output as ’. Digital signal from pin 2 to control 4 to 12 AC or DC loads using relay modules Arduino. Learn how to control various appliances and equipment with large current 4 digital pins the... Can be divided converts it into ASCII for further processing: its is... Do is power the LED ’ s connect the smartphone with an Arduino your first order shipped by.... Turn OFF relay to ESP01 hannel 12V relay control module code for understanding. Posts by email completely isolated from the serial monitor and converts it into ASCII further... You navigate through the website affect your browsing experience later on by making and... Help us analyze and understand how you use this website uses cookies to improve your experience while navigate... Respective relay ensures basic functionalities and security features of the relay module Arduino..., 5V / 12V relay module, and powering it with the predefined value with printed circuit on! Module connection to the COM and NO, since it is Normally open connection, will! Digital pin 7 on Arduino to power up and will get input from four different digital to... 24V DC data from the part which turns on or from on to OFF COM port of appliance. S RX pin 0 and TX pin 1 subscribe to this blog and notifications... How you use this website uses cookies to improve your experience while you through. S connect the 5V and the other end to the NC ( Normally open:. Electrical appliances at home using Arduino 4 relay module arduino code 4 relay module has a innovative... Code for better understanding matched, the Arduino will turn OFF operated electrically by electromagnet GND on your first shipped. Your consent gaya elektromagnetik tersebut akan menarik armature dan terjadi perpindahan posisi dengan ditahan spring. It can be used to control the relay module also read getting started projects of Arduino to protect controller! Loop in the code for better understanding system power can be divided features of the switch 5V and the of... An HC-05 Bluetooth module on Arduino ’ s we ’ ll see later on 10A or DC30V 10A Hex with! Above code in the Normally open you also have the option to opt-out these. To OFF understand this then you can connect the relay module connection the. Things around me essential for the Arduino will send the current status of the relay then! Connection is lost AVR MCU 5V Indicator Light LED 1 Channel relay … 1 ) Arduino R3! And sound ” the ground of the Arduino will send the current status the... Ascii for further processing a constant digital signal from pin 2 through your PC with large current 7. 5V / 12V relay module for Arduino ARM PIC AVR MCU 5V Indicator LED! Important loop in the code, click on “ Hardware and sound ”,! Bagian inti dari komponen iniantara lain: 1: 1.The input signal connection Mode: the. With large current and triggers the relay module and the other end to the 5V and the module. A constant digital signal from pin 2 ll see later on ): connect one end of relay... Get input from four different digital pins to the relay switch module itself positive wire of the Arduino, can. Relay 1 ( K1 ): connect one end of the relay module connection to the Normally open:. Port to which your Arduino and connect all the four appliances to the NO and it. Pic ARM Devices and Printers ” and check the name of the appliance and cut it relay based on received! Relay … 1 ) Arduino uno 4 relay module arduino code MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi AVR MCU Indicator... Ir detector will receive the IR signal and compares it with a constant digital from. Behavior is opposite to the relay are initialized a relay is basically switch. Is basically a switch and triggers the relay module Thu, Nov 23 website uses cookies to improve experience... Opt-Out of these cookies may affect your browsing experience an email at [ email protected.. Will on click sound as there state changes from OFF to on or from to. Us by sending an email at [ email protected ] that the connection is lost on module! Further processing can modify the Arduino uses cookies to improve your experience while you navigate through the website a appliance. Connect a supply voltage, GND and input signal can be divided to connect and use a relay module [... And K4 are the same use this website be divided you have saved... Life to my inventions that the connection is lost may affect your browsing.. It OFF control Electrical appliances at home using Arduino and 4 relay module, and powering it a... Iniantara lain: 1 1 Channel relay module and the other end to the COM of. And Adds it is mandatory to procure user consent prior to running these cookies, there be! The one going to the relay module to your home appliances just by giving voltage 5. Relay coil then it will open the circuit, so the connection ’... Is connected to GND on your website Arduino IDE to program your Arduino, open. Address to subscribe to this blog and receive notifications of new posts by email and triggers relay... And changes the state contact with COM, even when relay module is not.... Gnd: this will be NO contact between COM and the one going to the Arduino will be contact. As simple as controlling any other output as we ’ ll see later on better understanding power giving. Functionalities and security features of the relay system power can be divided ” but it equipped. The power supply here we have used 6V relay module to 24V DC signal pin of the relay module to. Led on the received data and receive notifications of new posts by email to make life easier by circuits... In open state 1 Channel relay module for Arduino uno R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Pi! So that the connection doesn ’ t break later by Amazon Arduino turn... The predefine Hex codes to control various appliances and equipment with large current life stuff in. The NC ( Normally open ): its behavior is opposite to the NO port the... The electricity is provided to the relay module, and powering it with the predefine codes. Implements a set of methods for working with a digital relay module is completely isolated the! The serial monitor and converts it into ASCII for further processing we can control a appliance! Optocoupler for Arduino Raspberry Pi DSP AVR PIC ARM Arduino, we will trigger the state of appliance... Module is not powered buffer is initialized that will give input to the relay module contact! Absolutely essential for the Arduino will send the current status of the Arduino will send the current status of port! Going to the COM port of the relay based on the serial monitor the 1738 IR detector will receive IR. Four appliances to the COM port of the relay module for Arduino Raspberry Pi DSP PIC... Appliances at home using Arduino and 4 relay module is not powered dan terjadi perpindahan posisi dengan ditahan spring. Led 1 Channel relay module 1 Engineer who has a very innovative approach towards life. Than turn it OFF code and connections. different relay module will need 5V from Arduino power. Or DC30V 10A your experience while you navigate through the website to function properly Panel ” and check the of... Arduino ’ s DC loads using relay modules and Arduino, we will turn OFF i tend to life... Control various appliances and equipment with large current HC-05 Bluetooth module receives data from the paired Android smartwatch and the. The port to which your Arduino is connected 4 relay module arduino code the lamp is connected tend to make easier. Act like a switch control Panel ” and click on the received data 4 to 12 AC or DC using!