Sorry, but I don't see any difference in the Ebay ckt to mine. The only thing that I see is that I have a LED and a resistor for the LED on the relay.
Also I don't see (nor have I ever seen) pull-up resisitors on the Inputs.
Not trying negative but I would like to understand.
I attached the opto I am using.
4N37S (Opto).pdf (269 KB)