Review on 🔌 Huayao 2pcs 4 Channel 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi by Josh Elkins

Name: 🔌 Huayao 2pcs 4 Channel 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi
Item: 🔌 Huayao 2pcs 4 Channel 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi
Rating: 3

November 12, 2022

It works. It may have an additional ground contact.

Relay is working properly. Solder joints are smooth and clean. I would like to see a ground pin next to VCC for the output side of the optocoupler. I'm not sure if the ground is isolated or not as you need to use the ground on the signal input side.

Pros

Rugged finish

Cons

Not all will fit

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