hi...im working on my project today...im don't know what to do...
I try to control the coin hopper hopper using relay module..every time it starts in gives extra pulse....
i try search about it and i think is a EMI...
i try read about this topic and tips..but sad to say...i don't understand...pls help me.
We don't understand either, since you have told us absolutely nothing about what you are trying to do. 
Maybe go and read the forum instructions?
ok..ty..i will my circuit diagram.. 
And a link to the data sheet of this hopper please.
OP has a new thread started (Mar 2019) -
SAME QUESTIONS, I’m thinking he doesn’t understand.