EMF Detector

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From an old Make magazine article. I designed the PCB in Eagle and powered it with 4xAA batteries. Webpage: https://sites.google.com/site/vectrasoft/projects/emf-detector You can purchase on my Tindie page: https://tindie.com/shops/vectrasoft/emf-detector/

Please let me know in the comments what you think about this device and its price - open to all comments!