W. GrachtOpencircuit 5V Relay module 8 channelsWorks well, with 8 channels there are quite a few options to control devices. The optocouplers keep the signal safely isolated.
FloOpencircuit Relay module 5VWorks perfectly. I use it to trigger a plasma cutter from a Creality Falcon 10w engraver. Requires adding a 5V power supply ( USB in my case) to avoid IO collapse