AEDIKO 4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level

Good price ands easy to use. These work well with the MedeaWiz Hydra controller for the Sprite video player.

Works really well, good quality

Seems to work with 3v logic level. Had some trouble with the inverse logic jumper. Looks like it floats and you need to use a pull-down resistor. When I did that 3v triggering stopped working though, so maybe the 5v rating refers to inverse logic mode?

Works fine for dev purposes. The terminal blocks are poor, and don't accommodate larger gauge wires. Max is probably 16ga. stranded, since the 14 ga. stranded doesn't fit each strand very well. I also don't like the Phillips screw heads, as most other terminal blocks have slotted. That means more tools on the workbench, which is annoying.

Product works as expected . I have to used it to control solenoid using float value for aquarium. Connect the 12v DC power directly to +/- terminals of relay.. Connect one float wire to signal interface and other wire to positive terminal. Now you can use this relay to make it NC/NO based on your requirement

Outstanding quality. Very excellent design.

This product works but it has one kind of stupid design flaw. More complete documentation could resolve the issue but as documented, the opto-isolator is useless! In order to actually isolate the relay power, you have to use the center pin of the 3-pin jumper. If the IN input is active low, the jumper pin is connected to +5V of the isolated device. If you want active high input, connect the input to the center pin and connect IN to ground of the isolated device. If you want more information, I would suggest contacting the seller since they provided such useless documentation. By the way, there are many copies of this circuit on Amazon and they are all equally dumb.

Working after correctly configured the the relay