Open a relay when 3 ACS712 modules detect curent flow

Projects General Guidance
1

Hi folks,
I need some hints here. I try to make a system where a relay open when i put a 12v bulb in a socket at the end of my circuit. I can only use the red wire (+) to do it. So i thought i could use an arduino with an ACS712 module to do it. Is it possible?

Thanks

2

Can you post a simple diagram please?

3

What is the current or wattage of the 12V bulb?

4

Here is the schematic of my project.

20200618_082744.jpg
20200618_082744.jpg3024×4032 786 KB

5

What does the ACS712 read when the bulb is NOT plugged in? When it IS plugged in?

6

0.11 amp when connected and 0.0 if the bulb is not plugged.

7

Your title says 3 bulbs, do you want the relay to activate when 1 bulb is plugged or all 3 or? Do you have a relay module or stand alone relay? Post links to all components. When you say "open" do you mean turn the relay ON or OFF?