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==== Sound detector ==== | ==== Sound detector ==== | ||
'''''Construction manuals''''' | |||
"Homemade EMF Detector For $10!" Listen & Record Electro-Magnetic Fields! [https://www.youtube.com/watch?v=qRasrZLdeEU] | |||
==== Nonstandard photography ==== | ==== Nonstandard photography ==== | ||