@laptop2d beats me! then again, I don't have a fancy standby switch on my bench supply, either

@Marla The culprit is of course the capacitive coupling insulation of the transformer power supply, Can I put 4700u cap in parallel in the dc jack to filter it? Seems a bit redundant as there are already tons of caps in the laptop itself.

@laptop2d the noise is 50hz, I don't think ferrites may help

@Marla Also, I mean, having fun in a sarcastic ways.. lol

@All Does anybody here happen to have experience engineering a 3 watt green 532 nanometer L.A.S.E.R?

I will guess the short answer to my question is no.

@NickAlexeev I heard about that biomedical engineer Scott Seidman. I would like to ask Scott Seidman a couple questions about the instruments, metals and electrical components inside a pacemaker. How do I contact Scott Seidman?