My
hobby is electronic design. I just took a short video (1:44 long) of my latest, which I call an Omni-Detector. It detects a wide variety of things. I here demonstrate detection of the human body's electric field.
OBSERVATION: I should take out the word "easily" here. I have done 2 metres' range myself, and have read of 7 metres. This particular circuit reliably detects the human body at ¼ metre plus.
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