ARCELI KY 019 Channel Module Arduino Review

Excellent relay. I'm using it for a project to control a 12v solenoid with Arduino and it's working fine. Activation is a bit noisy, but otherwise a great relay.

They will definitely work but only for a few uses. I burned 2 of these in 10 days. Like some other reviewers, I use them to switch my 3D printer to 24V. I'm running some tests to see if I'm trying to break too much load. They seem to work when the printer is fully cool and most of the fans are already off, but I know that at least the second one didn't turn on when the printer was cool (I've never switched while printing or under heavy load). They can perform better in very low power…

I was skeptical about goods from China. But for the price I tried. Everything I ordered worked great. China has opened a world of opportunities for students, entrepreneurs, educators and inventors. Without China, education would be the domain of the rich. Thank you China

2 out of 5 dead on arrival. spent some time checking that all other circuitry is correct. replaced with another one in the package and works as expected.

So all the pins that can be done is to turn on the working LED so that the side of the pin faces you, left positive center is negative, the right one must be a switch. Applying power or negative does not activate the switch but for my needs and time I modified it to work when you turn it contact side towards you, the first 2 big solder points activate the relay. left positive, right negative 5v gives you an audible click, now it works so yes it's a bit buggy, need to change to use it

Works well but not as easy to use as it's not labeled. I had to look at my other relay from another kit to see what is ground, positive, etc. Value for money is ok compared to buying it on aliexpress and waiting 30 days or more to receive it.

So all pins that can do is turn on the power LED so the side of the contact facing you left positive center negative right should be a switch. Applying power or negative does not activate the switch but for my needs and time I modified it to work when you turn it contact side towards you, the first 2 big solder points activate the relay. left positive, right negative 5v gives you an audible click, now it works so yes it's a little buggy, need to change to use it

The first one opened seemed to work, judging by the LED, but the switching was inaudible and the multimeter confirmed no continuity on normally open, although it should have been. The next two didn't even light up, but the last two worked fine. I tested each relay multiple times on the breadboard and placed different relay modules in the same spot. Another check suggests that the parts will work and the board itself is probably faulty. I haven't tested this, but I suspect it's correct, so it's…

They definitely work but only for a few uses. I burned 2 of these in 10 days. Like some other reviewers, I use them to switch my 3D printer to 24V. I'm running some tests to see if I'm trying to break too much load. They seem to work when the printer is fully cool and most of the fans are already off, but I know that at least the second one didn't turn on when the printer was cool (I've never switched while printing or under heavy load). They may work better in very low power applications so I…