Review on 🌐 MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi by Jenna Morocho

Name: 🌐 MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi
Item: 🌐 MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi
Rating: 3

October 22, 2022

Two out of three worked out of the box.

Two of the three relay boards worked as expected immediately after installation. Other reviewers had similar issues. I checked the signal paths with an oscilloscope and noticed that two pins are shorted due to a solder jumper on the bottom of the board. After I scraped off the solder jumper with a small screwdriver, the board worked as it should. I would have given 5 stars if it wasn't for the post production quality control. I would buy again.

Pros

Easy to use

Cons

Protection

New products

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