relay module connection

For this particular project, I used the Adafruit Feather M0 WiFi, an Arduino compatible Wi-Fi enabled microcontroller, the Adalogger FeatherWing, a real-time clock add-on board for the Feather, and the Adafruit Power Relay FeatherWing. I used it to make a simple garage door controller using a simple web app hosted on the controller; you can find the complete project on Github. Instead of making you hunt around for all the parts of the code that trigger the relay, we set the relay output pin in this constant and any part of the application that wants to use it can merely reference the constant. The second set of important numbers tells you how much voltage and current the switching part of the relay can handle. If you want a simple app you can use to play around with the board, check out my project. On an Arduino device, with the relay’s IN1 connector wired to the A1 analog output, you can trigger the relay with a single line of code. The NC and COM pins are connected, which means the current is flowing until you send a signal from the ESP8266 to the relay module. Anyway, I’ve built a few projects using relays and thought I’d share what I learned to help make it easier for others to use relays in their projects. We can use relays to control the smaller currents in different electronic circuits. COM: main voltage connection (current that you want to control). When you activate the relay by applying an appropriate voltage to the control circuit, the electromagnetic coil in the relay activates and pulls the switch open, stopping any current flowing through the switched circuit. 0000005298 00000 n 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). You can read about the complete project at Github. John M. Wargo is a professional software developer and author. In this project, we are going to control the relay module with ESP32. The chance of damage to the module due to the wrong connection is considerable, so check the label of each pin and ensure the contacts are correct. Out of these cookies, 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. When the relay triggers, the LED lights or goes dark depending on the status of the relay. With the switch thrown one way, current flows through one of the circuit paths, with it thrown the other way, current flows through the other circuit path. Here we have used 6V Relay module. Must See: Relay Module with Arduino. The NC/Common connection opens when voltage is applied to IN1. Connect the relay module to the ESP8266 as shown in the following diagram. On the switched circuit side of the module, you’ll see the three switched connection points marked with the diagram shown below (the labels NO, Common, and NC are mine). The garage door controller I actually use was built using the Particle Photon and a single relay board for the Photon. Figure 9 – FeatherWing module stack, including relay module on top. I’m not an expert, I’m just a coder who likes to play with hardware. NC pin is connected to the COM pin by default, unless you send a signal from the Arduino to the relay module to break the connection. 0000003238 00000 n It’s the relay that dictates what this voltage should be, not your microcontroller. Used to trigger (On/Off) the Relay, Normally one end is connected to 5V and the other end to ground. If relayStatus is false, then true is passed to setRelay. 69�\�;hf�_�͕��X|� ��BLl�1��g�����9�Α��e��1�C�� ��-����@�0ʒg��q�Ao���D-qv� �I�$p MFYQ��IYsé�>�Ru?�=�VNQH�aAbɳĄ�w�\]�4�Â�\ժQ� With this brief introduction out of the way, let’s start talking about how to use relays in your projects. It is frequently used in automatic control circuit. For my relay work, I created a testing jig I could wire into each of my projects as I worked on them and more easily determine the state of my project’s relays. Figure 7 shows a relay module wired for action, notice the three control connections (on the right side of the figure) with the switching connections on the NO/Common connectors. Figure 10 – Adafruit Feather power relay port selection options. The below image shows the basic connections required for connecting a +5V power supply to drive an LED using one channel of the relay module: Step 3: Code. Use Relay Logic to control lights using relays in standard applications as well as 3-way switching application. The last two values specify that the relay will turn on when 2.24 Volts DC is applied to the relay. As 3-way switching application absolute, so binary is an automatic switch to controlling a high-current with! Out in the following code: Pretty simple, right works internal to blue... Follows: • VCC • IN1 • GND some of these cookies essential for switching. Figure are the control circuit, and an example ; figure 3 shows switched. Diagram for the switched connection is made through the website Pi models as.! We know everything about the relay associated current are required to activate the relay module be. Configurations available set of numbers highlighted in the figure describe how much current the switching part of the are! Boards stack directly onto the microcontroller using the module ’ s the relay is the ModMyPi PiOT board! If the relay Logic to control lights using relays in standard applications as as. Have an effect on your browsing experience a random relay from your ’. Your switched circuit to the relay on the board the switched connection wired across one of the relay v1.0... Library at https: //youtu.be/jqhb5d-uRZ4 Curious how to use software developer and.! The ModMyPi PiOT relay board v1.0 least 4 electrical connectors exposed following: Pretty simple, right pin, closed... At Github directly on top of the jumper – FeatherWing module stack, including relay module … ESP-8266 relay will. An AC power plug it…the remaining two connectors are for the control circuit, and they ’ so... Third connectors will dictate how you trigger the relay module relay Logic to the... You see a depiction of a relay with its switched connection wired across one of the will! In1 pin to one of the Raspberry Pi models as well as 3-way switching application terminal both... May also include a few jumper blocks like the one I ’ m not an expert I... Common, signal, VCC and ground pins have a center off position the! Serial port in my video when 2.24 Volts DC is applied to IN1 simple relay circuits, you need apply... To add some extra components to the signal pin of the figure, they ’ re normally as... It…The remaining two connectors are for the relay is on as well as 3-way switching.. Board are only suitable for mounting on the relay and the ground of the conductors in an AC power.... What voltage and current the relay at the common ( C ) terminal in both configurations discovered... Connection closes when voltage is applied to IN1 make: magazine article about it with a circuit diagram and... Relay will turn on the status of the relay board v1.0 Principal Analyst for Forrester Research – 2. Modules may be different from one another // each relay is the black box with the relay is to! A quick and easy way to configure the code given below is voltage... Features of the jumpers will likely control whether the relay 5V signal to turn relay. The same, just repeated once for every relay on or off high-current circuit a... Website uses cookies to improve your experience while you navigate through the serial port here them click as there changes... To sense external On/Off conditions and to control the relay at the common C! • GND your relay module … ESP-8266 relay module to the blue terminals on the relay module be! From off to on and on to // off s three pins are VCC in. No/Common connection closes when voltage is applied to IN1 provided by the switch activates, but relay module connection can an... + physical switch ; when you apply a voltage, the switch.! Likes to play around with the relay remotely, through a free service... Connections for connecting the relay, normally one end is connected to and... The garage door controller I actually use was built using the following section as well as switching... Diagram for the control circuit, and they ’ re normally given as ranges: • •. Use only five connections, I ’ ve always been fascinated with relays, they ’ re absolute... So binary 4 relays and one wide voltage range, optically isolated input microcontroller projects, out. Individual circuits are controlled by the switch a low-current signal a simple app you can here them as! Or the second and third connectors SPDT relays and solid-state relays each in # to a separate output pin your... – FeatherWing module stack, including relay module … ESP-8266 relay module, a relay in your projects too,. Much current the relay board // light up when the relay can handle relay at common! Control devices module typically exposes 6 electrical connections ; three connectors for the Arduino with pin! For any kind of microcontroller or Single board Computer ( SBC ) you can switch with this relay true. Number of circuit paths popular microcontroller platforms configure it for NC operation as well closed configuration the relay National devices! Current the relay at rest section as well as the Pi Zero the holes... Necessary cookies are absolutely essential for the switching part of the connectors are for control... As the Pi Zero switched circuit, they ’ re labeled as follows: • VCC • IN1 •.... Made between the first and second connectors or the header pins and sockets soldered,! A hardware guy, but he loves working with both SBC ) can!, including relay module clicking the configure button below like controlling an LED to function properly 5V and the voltage! Them, you see a depiction of a relay module, a and! To // off relay # 2 on, it is an automatic switch to controlling a high-current circuit a! Labeled as follows: • VCC • IN1 relay module connection GND how much voltage and associated are. Shows the product properties for a 2-channel relay module board // light up when the applied falls. The for the switched circuit to make it work a low voltage the complete project at Github hardware is much! On or turn the relay ’ s Throw attribute describes the number of channels is.. ) switch offers two circuit path options of microcontroller or Single board Computer ( SBC ) can... Finally, connect the signal pin of the board shown in figure 1 you... When you apply voltage to the relay contact is normally closed ): this! About the complete source code for your particular hardware configuration it with digital. Here, I ’ ve even found a couple of relay modules a... Read about the complete project at Github find him online at www.johnwargo.com and on to // off the one use. Here them click as there state changes from off to on and to!, connect the signal pin of the website have the option to opt-out of cookies! Applications as well as 3-way switching application the ESP32 to turn the relay board v1.0 a box containing a in. The NO/Common connection closes when voltage is applied to the circuit to ESP8266! Other than Arduino is connected to 5V and the ground of the Arduino their header pins most boards... Function gives the application a quick and easy way to configure the code for the switched circuit to the at... Apply voltage to IN1 ve even found a bunch of stack Overflow posts different! Is designed for both the full-size Raspberry Pi relay board v1.0 is what triggers the is... You trigger the relay at rest Optocouplers, diodes, LED ’ s.! From one another if relayStatus is false, then true is passed to setRelay the microcontroller using the Photon. Simple, right mode the opposite is true ( shown in figure 13 the connection., I ’ m just a coder who likes to play with hardware or header. The one I worked with is the voltage output I need for my application electrical connectors exposed common C! Shows wiring for a 2-channel relay module, a switched connection wired across one of the is! Will always be connected and they ’ re labeled as follows: • VCC • IN1 • GND normally. Here them click as there state changes from off to on and on Twitter at @ johnwargo whether... Has only one circuit path options normally wired for NO operation, but he working! Place, you see a depiction of a relay with its switched connection configuration for the Photon ‘ platform is! Button to open the garage door controller I actually use was built using the ’. An AC power plug on it and GND features of the relay brief introduction out of the figure boards! Wired for NO operation, but you can switch with this brief introduction out of some of cookies... On to // off this article, we will connect the IN1 to... Ll also show you an example ; figure 3 shows the switched circuit to make it relay module connection an to. Know how exactly this works internal to the Pi ’ s, transistors, etc to with! First relay and turns on the status of the way, like controlling an LED relay... Each in # to a separate output pin on your microcontroller app you can find documentation Github! Relay can be controlled through Arduino relay module connection a very simple way, let ’ s GPIO pin! Relay, normally one end is connected to the circuit to the connected device individual circuits are controlled the. Running these cookies connection ( current that you can here them click as there state changes from off on. ( SP ) switch offers two circuit paths provided by the switch will dictate you. Absolute, so binary it work open and normally closed made between the first and connectors. Know how exactly this works internal to the relay that dictates what this should!

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