Pin 8 -----IN4. Pin Name. Let’s have a look at the pinout of one channel relay module. The following diagram shows its pinout diagram. GND is the ground connection. The circuit which powers the coil is completely isolated from the part which switches ON/OFF, This provides electrical isolation. Input ground reference. The two connectors (with three sockets each) on the left side of the relay module connect high voltage, and the pins on the right side (low-voltage) connect to the ESP8266 GPIOs. The 4-Channel Relay Module is a full-height module that provides four relay outputs. As shown one end of the load can be connected to the Common pin and the other end is either connected to NO or NC. This switch can be anything from a small transistor to a microcontroller or a microprocessor which can perform switching operating. Description. GND. VIEW MORE 2. iMatic RJ45 Ethernet/Wi-Fi Control Board with integrated 16-Ch DC 12V Relay. The following figure shows the relay module pinout. 4-channel 5V USB Relay Module. VCC pin supplies power to the module. Topic: Wiring 4 or 8 channel relay to wall switches (on/off) (Read 4369 times) previous topic - next topic. Input for directly powering the relay coils. The one you use will depend on whether you want the 5V signal to turn the switch on or turn the switch off. Two way Control, wifi button + physical switch for Single AC device Curious how to handle web pages in Arduino? So, connect the 5V and the ground of the Arduino with the 5V and the ground of the relay module. Before we proceed with the circuit to drive the relay we have to consider two important parameter of the relay. Input ground reference. Relays work on electromagnetism, When the Relay coil is energized it acts like a magnet and changes the position of a switch. Jr. Input 4: Connect to a digital output from your microcontroller, or leave unconnected if channel not used. For demonstration purposes, let’s take a look at the pinout of a 2-channel relay module. $46.99. The following information introduces KC868-H4 4 channel wifi relay module. It is fairly easy to turn that into a WiFi controlled 4 channel relay with an ESP8266. PI GPIO | Relay module. All rights reserved, STM32F2 Series High-Performance Microcontrollers, STM32F4 Series High-Performance Microcontrollers, STM32F7 Series Very High-Performance Microcontrollers, STM32F0 Entry-Level ARM® Cortex®-M0 Microcontrollers, STM32F1 Series Mainstream Microcontrollers, STM32F3 Series Mixed-Signal Microcontrollers, STM32WB5MMG - STM32 Wireless MCU Module for Increasing Design Productivity of BLE and IoT Devices, Digi-Key Becomes Official Raspberry Pi Authorized Distributor and Will Carry the Full Line of Raspberry Pi Products, Trigger Voltage (Voltage across coil) : 5V DC, Maximum AC load current: 10A @ 250/125V AC, Compact 5-pin configuration with plastic moulding, Operating time: 10msec Release time: 5msec, Maximum switching: 300 operating/minute (mechanically), For Home Automation projects to switch AC loads, To Control (On/Off) Heavy loads at a pre-determined time/condition, Used in safety circuits to disconnect the load from supply in event of failure. // These data pins link to 4 Relay board pins IN1, IN2, IN3, // Initialise the Arduino data pins for OUTPUT, digitalWrite(RELAY1,LOW);           // Turns ON Relays 1, delay(2000);                                      // Wait 2 seconds, digitalWrite(RELAY1,HIGH);          // Turns Relay Off, digitalWrite(RELAY2,LOW);           // Turns ON Relays 2, digitalWrite(RELAY2,HIGH);          // Turns Relay Off, digitalWrite(RELAY3,LOW);           // Turns ON Relays 3, digitalWrite(RELAY3,HIGH);          // Turns Relay Off, digitalWrite(RELAY4,LOW);           // Turns ON Relays 4, digitalWrite(RELAY4,HIGH);          // Turns Relay Off, Previous Step: Making LED lights dance to your music, Zircon - This is a contributing Drupal Theme, NetSensor: Monitor your sensors from anywhere in the world. A popular relay board that is available at the Chinese webstores is a 4 channel opto isolated relay module. Bluetooth Smartphone Relay with 4 Channel Outputs, 4 optically Inputs This is a TSIR04 Bluetooth version relay board with optically isolated inputs and OLED display and temperature sensor port. Then it’s a only a matter of just connecting the communication pins, labeled IN1, IN2, IN3 and IN4, two 4 data pinson the Arduino.In the example code below we used Arduino pins 7, 8 , 9, 10. 3V Relay, 12V Relay, 1-channel Relay module, 4-channel Relay Module. Pin 11 -----IN2. $13.99. Subscribe to stay updated with industry's latest Electronics components and news, STM32F2 MCUs use advanced 90 nm NVM process technology with an adaptive real-time memory accelerator, STM32F4 MCUs leverage NVM technology to reach the highest benchmark scores for Cortex®-M-based MCUs, STM32F7 devices deliver the maximum theoretical performance of the ARM® Cortex®-M7 Core, STM32 development boards implement the full range of device peripherals and features of STM32 MCUs, STM32F0 MCUs offer real-time performance and low-power operation for cost-sensitive applications, STM32F1 MCUs are ideal for an array of applications in the industrial, medical, and consumer markets, STM32F3 MCUs combine a 32-bit ARM® Cortex®-M4 core with a high number of integrated peripherals, The STM32Cube with graphical software configuration tool reduces development efforts, time, and cost, Components101 is a resource dedicated for electronics design engineers, covering product news, analysis and articles on latest electronics components.Â, Copyright 2020 © Components101. LOW signal will turn relay ON and HIGH signal will turn relay OFF. Input 3: Connect to a digital output from your microcontroller, or leave unconnected if channel not used. 57 x 55 x 25mm; Supplier Product Code. VIEW MORE 2. Our relay here has 5V trigger voltage, but you can also find relays of values 3V, 6V and even 12V so select one based on the available voltage in your project. It is an active low pin, meaning the relay will be activated when you pull the pin LOW and it will become inactive when you pull the pin HIGH. Let us learn how to use one in our circuits based on the requirement of our project. I have just added a 4 Channel Relay Module to my collection of bits. If connected to NO the load remains disconnected before trigger and if connected to NC the load remains connected before trigger. It is equipped with highcurrent relays that … This 8 Channel Relay module can adopt most common range of microcontrollers, such as Arduino, Raspberry Pi, AVR, PIC, ARM with digital outputs to control larger loads devices like AC or DC Motors, Electromagnets, Soleniod, Incandescent light bulbs, Actuators and any another devices that you want to drive with in the relay. Make sure the load you are using falls into this range. VIEW MORE iMatic RJ45 TCP/IP Remote Control Board with 8-Ch Relay. VIEW MORE 2-Channel 5V Solid State Relay. Control Pins: IN pin is used to control the relay. If leds start flashing from IN1 to IN4 and shutdown from IN4 to IN1 then everything is okey and the wiring is like currect .We can move to the next step . 2. Arduino kit to connect temp and humidity sensors to the internet, All you need is a browser and you can see the data anywhere in the world. Pin Number. 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. IN2. This is a 5V 4-channel relay interface board, and each channel needs a 15-20mA driver current. Since the relay has 5V trigger voltage we have used a +5V DC supply to one end of the coil and the other end to ground through a switch.