4pcs 12V 1 Channel Relay Module Board with Optocoupler Isolation, High and Low Level Trigger, 10A Relay Control for Arduino, MCU, and DIY Automation

Used the 12vdc relays for my 12vdc charging project. One for the charging and other to cutoff the load during charging. In a different 12vdc project used a lm358 circuit to triggering the relay in a over voltage cutoff which would cutoff it main 12vdc supply so it could not restart.

Got them right on time, it does the job perfectly well.

I purchased these relays and tested the NC contact pair. Almost all of the relays turned out to be very sensitive to mechanical vibration. I honestly cannot imagine what kind of current rating can be claimed for switching in these conditions. I am not satisfied with this product.

Le niveau bas est vraiment très bas , nickel

Works great.

come da descrizione, funziona molto bene, specie se si passa dalla modalità H alla modalità L

It works but unfortunately one of them was faulty