1pcs DC 12V Relay Module 1 Channel Relay with Optocoupler High or Low Level Trigger Expansion Board

Just what I needed. I needed a very quick repair for a project I was working on, and these arrived the next morning. They were perfect for repairing a faulty relay and worked a treat. Fast delivery and did exactly what I needed them to do.

Really surprised how easy it was to use these in my project. Seem well built & reliable so far

This little 5V relay has been great for a few Arduino projects. It worked right away, and there have been no issues with relays sticking. The build quality feels perfectly solid, although they were obivously hand soldered, and a little scuffed, but they all worked fine, so couldnt fault them, It wasn't used for anything with a massive load, but it was a nice solid click no weak coils.

As described, does whatever need

Quality

*Be aware that the relay component on the items doesn't match the spec of the one's on the listing though (blue vs black, for one), but the differences are marginal - just be aware is my advice.** The main thing I'd mention first is that this particular relay has is configurable between high/low trigger, I had to swap the jumper for my first project to 'high' as it was default to a signal low trigger - I assumed the board was working fine because the (helpful) indicator led's were all fired up - so as soon I figured I needed to swap it to signal low trigger it worked swimmingly. I'm using it in my 3d printer to use the onboard 0.3a current-limited JST header (that normally powers the rubbish stock LEDs) as a 5v signal to trigger a higher capacity 5v feed for additional lighting - so I can control it using the stock on/off options. It was quick to get it all working as planned with this relay, and the output seems to work fine with DC instead of AC too.

Like,The small size. Dislike no wiring diagram. I wired this unit with extra low voltage float switches which then triggers the control circuit of my pumps.

I m happy with this

Excellent produit. Expédition rapide. Produit conforme à la description.

Ok

Function was as expected for a fair price

100%goed

Ottimo modulo relè ben costruito, affidabile e facile da usare. L’optocoupler garantisce isolamento e stabilità. Rapporto qualità-prezzo davvero eccellente.