[youtube=”http://www.youtube.com/watch?v=y1Bke3750WE&feature=youtube_gdata”]

Use an Arduino microcontroller to sense invisible electromagnetic fields using wire, a resistor, and an LED.

Aaron ALAI’s EMF detector project is awesomely simple to make and fun to use. An upgraded version can be built using an LED bargraph for more ‘meter-like’ functionality.

original project can be found here –
http://www.aaronalai.com/emf-detector

additional info, and Arduino sketch –

Making the Arduino EMF detector

audio/video by Collin Cunningham

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