Review on 🔴 Highly Effective 8 Channel 5V Relay Module with Optocoupler Isolation for High/Low Level Trigger Relay Support – Red Board by Ashley Stolen

A piece is missing in the blue box. It was a production IDGAF and not damaged in transit as the packaging was sealed and the missing part was not present. Hit one. The damage didn't expose the AC that easily, so I went ahead. Setup with a Raspberry Pi was straightforward (I isolated/shifted the 3.3V signals to 5V and used an external 5V power supply), and testing with the onboard LEDs showed expected behavior. Where we fly into the danger zone is with an absolutely crappy terminal. Blocks. It's a joke: screws from a metal pot, stripped blocks. They don't tighten properly and are totally out of spec. They use the same blocks for 3.3-5V data lines as 250VAC lines. Output terminal blocks rated at 250VAC/10A must accept 16 AWG wire. You barely have room for 24 AWG. To get the AC terminal blocks to work at all I had to crimp the spade connector and cut off a leg or solder directly to the pass-through pins on the underside of the board. It's a dangerously crappy fake with a decent design. Look elsewhere.