However, when I touch the metal part (aluminum?) of the microscope to adjust focus, I feel slightly unpleasant "pinches" on my wrist, where the ESD wrist strap is. So I thought: I can attach the body of the microscope to a flexible arm outside of the mat, so that it stays 15cm above the mat (and ICs.) I know the microscope is not ESD-safe, but I don't know other solutions than maybe buying a professional microscope for 1000-2000USD.
The microscope is powered by a USB charger from the wall plug, so it is not connected to the same grounding point of the mat and wrist strap (because the charger has only 2 pins on the plug, not 3 like mine Earth bonding point.) I use the microscope for soldering and inspection at home for hobby projects. I have an ESD mat, ESD wrist strap and a Chinese USB (power only) digital microscope(Andonstar ADSM201.)
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