Hi, thanks for help guys.
I know, it says 3v to 32v, LED get lit at 3v but no switching, same at 5v.
I'll try with a npn transistor. Tried with some transistors I had at hand, but without luck. I think some of them were pnp or probably faulty. (scavenged parts)
I already checked the internet for info, but not finding anything useful.
That's why I came here for help.
@OldSteve
Does it look right ?
btw, mine looks exactly like this. cheap chinese. the reseller couldn't tell if it's random or not.
@Runaway Pancake
read about it, i hope mine is not random switching.
Thanks again dudes !