Anyone have much experience with the Chinese 5v relay boards? I’ve just ordered one online and when it’s come it seems to work on 3.3v, when I give its digital input 3.3v from a Photon pin, the “energised” LED lights up and I can hear a flutter, but there’s no continuity across the relay’s pins which should now be connected.
Have I just got a duff relay or is this symptomatic of not enough power? I have used these self same relays before on other projects with 3.3v and they’ve worked fine.
Thanks