Hello, I am new here, I followed google and he point me to this forum for a problem I have. I am discussing this problem in another forum already, so im referring to the guys there in my video explanations.
I built this composite circuit that have a sensing circuit in it which is disturbed by the mains 50Hz in the wall, over the normal switch light location. Here is the circuit diagram: https://www.deviantart.com/q12a/art/Q20201219-SCAN-Image-864540519
Here is the latest video I made, explaining and showing the problem. Its a short 5minute movie. https://www.youtube.com/watch?v=feGfhEhiCsI
When I test it on my table (which is made from mild steel and also grounded) the entire circuit behaves ok. But here on the wall, it's disturbed. I already tried shielding with a piece of metal sheet grounded. It helped but like 5%, which is not good enough.
Thank you and I hope you can give me a solution to my problem.
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