--- product_id: 86609832 title: "ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi" brand: "visit the elegoo store" price: "£8.90" currency: GBP in_stock: true reviews_count: 8 url: https://www.desertcart.co.uk/products/86609832-elegoo-4-channel-dc-5v-relay-module-with-optocoupler-arduino store_origin: GB region: United Kingdom --- # ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi **Brand:** visit the elegoo store **Price:** £8.90 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi by visit the elegoo store - **How much does it cost?** £8.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/86609832-elegoo-4-channel-dc-5v-relay-module-with-optocoupler-arduino) ## Best For - visit the elegoo store enthusiasts ## Why This Product - Trusted visit the elegoo store brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Full description not available ## Features - This relay module is 5V active low. Relay output maximum contact is AC250V 10A and DC30V 10A. - Standard interface can be directly connected with microcontrollers. - Working status indicator lights are conducive to the safe use - 4-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 equipments with large current. - Widely used for all MCU control, industrial sector, PLC control, smart home control. For a complete data sheet for this relay board, please download it from: http://dwz.win/UhW ## Images ![ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi - Image 1](https://images-na.ssl-images-amazon.com/images/I/71-LmPoCd9L.jpg) ![ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi - Image 2](https://images-na.ssl-images-amazon.com/images/I/71HROTPwpsL.jpg) ![ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi - Image 3](https://images-na.ssl-images-amazon.com/images/I/61NJRikxWTL.jpg) ![ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi - Image 4](https://images-na.ssl-images-amazon.com/images/I/71epJNdFMQL.jpg) ![ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi - Image 5](https://images-na.ssl-images-amazon.com/images/I/71BnyZ61IdL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Elegoo 8 Channel Relay Module using Raspberry Pi 3 *by K***E on Reviewed in the United States on April 15, 2017* I have just finished using this for a Raspberry PI project to control my living room and bedroom ceiling fans. This module works very well when connected properly to the RPi. There is a lot of misinformation on this product and the look-alikes. I measured the actual current usage based on my project and here are the facts:The current draw on a single 3.3V GPIO port to turn on a relay is 0.47mA only, not 16-20mA as given in the specs. The max current draw for a RPi GPIO port is rated at 16mA, so there is plenty of power to drive these relays. The relays are being driven by the 5V source, and the GPIO is only switching on the relay driver current.The increase on the main 5V power supply when a single GPIO port is activated is 53 mA. I did not measure this for 2 relays at the same time. The 53mA to turn on a relay is coming completely from the 5V power source, in my case a 2.5A wall wart connected to the microUSB connector, so this current does not strain the RPi at all, only the wall wart.To connect the RPi to this module, connect a 5V pin from the RPi to the JD-VCC connector on the module, and a RPi GND pin to the GND pin on the module just to the left of the JD-VCC pin. Leave the middle VCC pin unused.Connect a 3.3V pin from the RPi to the VCC pin on the 10-pin connector on the module. I also connected another RPi GND pin to the GND pin on this connector. Finally connect your GPIO pins to each of the 8 inputs on this 10-pin connector. ### ⭐⭐⭐⭐⭐ 5 Stars in my Book. *by M***. on Reviewed in the United States on June 29, 2018* Great relay boards, I just have to get my dog to stop opening up any amazon package first. I think she get so excited she forgets to smell it first to see if it is a package of treats or toys for her. Once she gets the envelope or box torn open and takes out what is inside then she seems to stop and smell it then and if it is not her treats or toys she stops... .... so long story short both of my 8 channel relay board worked just fine. I tested them all 8 channels worked as expected. Just remember before you write up any negative reviews about these relay board are LOW active triggered not HIGH as you may be normally expecting. In fact all of these style relay board are ALL LOW ACTIVELY TRIGGERED no matter if it is a single channel or 16 channel relay board. Also so I have seen some negitive reviews about the contacts failing at less than 10 amp and less than 30 volts DC. You have to protect the contacts if the load you are switch is inductive and not just resistive. you can use a 1/2 watt 100 ohm resistor in series with a 0.1ufd , non polarized capactor rated at 1000 volts across your relay contact to help bleed off and suppress any arcing across these contact to protect them from welding closed. Hope this is helpful for you. if you are not well versed in electronics please read as much as you can so you can have more fun and less disappointments. ### ⭐⭐⭐⭐⭐ Great little board I am using as a lighting controller ... *by A***N on Reviewed in the United States on June 30, 2018* Great little board I am using as a lighting controller with an arduino + pc serial remote controlArduinoIDE codeconst int r1 = 10; //d-io 0-1 are tx/rxconst int r2 = 2;const int r3 = 3;const int r4 = 4;const int r5 = 5;const int r6 = 6;const int r7 = 7;const int r8 = 8;const int sr1 = 0;const int sr2 = 0;const int sr3 = 0;const int sr4 = 0;const int sr5 = 0;const int sr6 = 0;const int sr7 = 0;const int sr8 = 0;int incomingByte = 0;void setup(){ Serial.begin(9600);pinMode (r1, OUTPUT);pinMode (r2, OUTPUT);pinMode (r3, OUTPUT);pinMode (r4, OUTPUT);pinMode (r5, OUTPUT);pinMode (r6, OUTPUT);pinMode (r7, OUTPUT);pinMode (r8, OUTPUT); digitalWrite(r1, HIGH); //default all relays off digitalWrite(r2, HIGH); digitalWrite(r3, HIGH); digitalWrite(r4, HIGH); digitalWrite(r5, HIGH); digitalWrite(r6, HIGH); digitalWrite(r7, HIGH); digitalWrite(r8, HIGH);}void loop(){ int state; if (Serial.available() > 0) { // read the incoming byte: incomingByte = Serial.read(); } if (incomingByte >= 49) { if (incomingByte <= 56) { state = incomingByte - 48; if (state == 1) { digitalWrite(r1, HIGH); } else if (state == 2) { digitalWrite(r2, HIGH); } else if (state == 3) { digitalWrite(r3, HIGH); } else if (state == 4) { digitalWrite(r4, HIGH); } else if (state == 5) { digitalWrite(r5, HIGH); } else if (state == 6) { digitalWrite(r6, HIGH); } else if (state == 7) { digitalWrite(r7, HIGH); } else if (state == 8) { digitalWrite(r8, HIGH); } //delay(2000); Serial.print("I received: "); Serial.println(state); //delay(6000); incomingByte = 0; } } if (incomingByte == 43) // + as turn on all pins { digitalWrite(r1, LOW); digitalWrite(r2, LOW); digitalWrite(r3, LOW); digitalWrite(r4, LOW); digitalWrite(r5, LOW); digitalWrite(r6, LOW); digitalWrite(r7, LOW); digitalWrite(r8, LOW); } if (incomingByte == 45 // - as turn off all pins { digitalWrite(r1, HIGH); digitalWrite(r2, HIGH); digitalWrite(r3, HIGH); digitalWrite(r4, HIGH); digitalWrite(r5, HIGH); digitalWrite(r6, HIGH); digitalWrite(r7, HIGH); digitalWrite(r8, HIGH); } if (incomingByte == 97) // a = on { digitalWrite(r1, LOW); } if (incomingByte == 98) // b = on { digitalWrite(r2, LOW); } if (incomingByte == 99) // c = on { digitalWrite(r3, LOW); } if (incomingByte == 100) // d = on { digitalWrite(r4, LOW); } if (incomingByte == 101) // e = on { digitalWrite(r5, LOW); } if (incomingByte == 102) // f = on { digitalWrite(r6, LOW); } if (incomingByte == 103) // g = on { digitalWrite(r7, LOW); } if (incomingByte == 104) // h = on { digitalWrite(r8, LOW); } if (incomingByte <= 104) { if (incomingByte >= 97) { Serial.print("I received: "); Serial.println(incomingByte); incomingByte = 0; } } //delay(100);} --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/86609832-elegoo-4-channel-dc-5v-relay-module-with-optocoupler-arduino](https://www.desertcart.co.uk/products/86609832-elegoo-4-channel-dc-5v-relay-module-with-optocoupler-arduino) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-16*