4pcs DC 24V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level

I use it to control the plasma torch I mounted on a laser table.

I am very happy with these small devices. I only tried a few of them and they work great on my bench! Good price for 4 of them. Only negative thought is the screw terminals are not the best, they do work, but not very good. If the screw terminal does fail over time, I will just solder the wire in place and ignore the terminal.Update Mar 03, 2023:My only complaint is the mounting holes on the board. The board is too small and the holes are too close to the edge of the board, and too close to the terminals. Difficult mounting and using screws. They need to make the board "bigger" in size to allow more spacing for mounting.

EDIT: Seller made it right... 5* Also there is a few videos showing this being ran on a 50volt E-bike battery? Don't do it this will fry it.. Only rated for 12v. You may try a stepping down your battery, to 12v. or try connecting through the controller, if you can find a lower voltage out put..Ok so I went to connect a 12volt battery?.. Nope nothing.. So 2 of the 4 PCBs were bad.. Got them to work with one 12volt battery.. Works good in tandem with my horn, head light, turn signals, Made for a rear E-Bike brake lights.. Works great.. What's nice is it will run even if the e-bike battery is not on..

I updated my review after getting these to work. Originally, I could not get these to work with my ESP8266 which outputs 3.3VDC. They would not work using either the Hi Level or the Low Level input signals.Miraculously, it is working fine now at 3.3V input signal using the Low Level signal input.My only gripe is that they have a super bright green Power Input signal that is very annoying. No need to be so bright. Also, one of the diagrams shows the DC input to be 5VDC. The relay is clearly labeled 12VDC and that's what I'm using to power mine.

I use this device to provide a mute circuit in a bias T I made for a remote antenna pre-amplifier. A control line which goes to ground when my transmitter is activated, connected to the low input, triggers the relay. Works well.

I needed a 5 v logic relay, these do the job. decent ampacity for light loads too. It does also need a 5 volt supply to drive the relay coil. includes a driver and isolation ckt. great price for 4. I used it for my CNC router.

Es un módulo relé común pero el que tenga el convertidor de nivel te ahorra espacio y simplifica el cableado

My laser engraver sends out a low current 24v signal when it's running and I needed that to close a switch that starts up my exhaust fan. I purchased this just to turn on when 24v was applied and not when a low voltage signal is present. So I just added a 2.2k ohm resistor between DC+ and IN