8 Channel Relay Board is a simple and convenient way to interface 8 relays for switching application in your project. This project is a 2 Channel Relay Board. It can be used to control various appliances and equipment with large current. $6.99. The relays are controlled by USB capable Microchip PIC Microcontroller (PIC18F14K50) and come with built-in firmware that supports simple commands to control relays and read relay status. Maximum load:AC 250V/10A, DC30V/10A 2. 2 Channel 5V Optical Isolated Relay Module This is a LOW Level 5V 2-channel relay interface board, and each channel needs a 15-20mA driver current. 3V Relay, 12V Relay, 1-channel Relay module, 4-channel Relay Module. UL,CUL,TUV recognized. 2-Channel Relay Module; Two Small Incandescent Bulbs (for demonstration in the output) Connecting wires; Power Supply; Computer ; Circuit Design. There is no connection between the low voltage circuit operated by the microcontroller and the high power circuit. Compatible with NPN and PNP input signal, the relay board is powered with 24V DC and has 1NO+1NC or 2NO+2NC relay contact form. The circuit on the PCB is quite simple. The circuit diagram is pretty straight forward. 220-ohm Resistors. The relay module has 2, 4, 6, 8, 10, 12, 16, 20, 24, 32 channel for options. On that page it has a wiring diagram, The pins are hard to see in the pic The main block is GND, IN1, IN2, IN3, IN4, IN5, IN6, IN7, IN8, VCC The smaller block with the jumper is GND, VCC, JD-VCC; with the VCC and JD-VCC jumpered. Please make sure to use a freewheeling diode or snubber circuit if the load is inductive. Description. LDR Sensor. Input – 12 VDC @ 336 mA Output – eight SPDT relay Relay specification – 5 A @ 230 VAC Trigger level – 2 ~ 5 VDC Berg pins for connecting power and trigger voltage LED on each channel indicates . Features. The isolation relay module is an electrically operated switch that allows you to turn on or off a circuit using voltage and/or current much higher than a microcontroller could handle. Below given is Relay Driver Circuit to build your own Relay module: Circuit Diagram and Working: In this Arduino Relay Control Circuit we have used Arduino to control the relay via a BC547 transistor. Let us learn how to use one in our circuits based on the requirement of our project. Controlling 2 Channel Relay with Arduino Uno These are the variables that you declare at the beginning of the program. I have also connected the HC05 Bluetooth module, 1738 IR receiver to control the relays from Bluetooth and Infrared remote. Further, In the 2-Channel relay module, the low-voltage side has a set of four pins. NB: customers can use any software or firmware to control the module as long as the IN1 of which can input a voltage of 3V-5V.you can do further development with the development tool you like as well as test it in the way of testing firmware. The 12v adaptor is used for powering the circuit. The acknowledgement LED will light up momentarily every time when we press a button on the remote and only if the transmitted signal is received by the receiver and then the receiver send a feedback signal … Then connect the loads as shown in the circuit diagram. LEDs 1 and 2 are connected across the relay coils to give visual indication when the relays are on and can be omitted if not required. HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V 4.5 out of 5 stars 118. // Opto-isolated relay blink sketch Electrically by electromagnet very simple the lamp occasionally, so it is better to use one in our circuits on. 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