Arduino EMF detector

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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 –
http://blog.makezine.com/archive/2009/05/making_the_arduino_emf_detector.html

audio/video by Collin Cunningham

Duration : 0:3:23


[youtube y1Bke3750WE]

25 thoughts on “Arduino EMF detector”

  3. Well,just like the …
    Well,just like the device in ‘Super Natural’ for detecting the devil….

  4. @jonjon50088 …
    @jonjon50088 actually u could trick the physics and move the “antenna” along the dc wire…so i will get an induction…anyway…its really not the point of it

  5. @station2station …
    @station2station But speakers use magnets, so they will cause interference.

  6. @jonjon50088
    But …
    @jonjon50088
    But you could still use it to detect wiring before drilling a hole in the wall.

  9. You should now add …
    You should now add a piezo speaker to output sounds similar to that on a PKE meter… heh you can walk around and pretend you are finding little voltage ghosts…

  12. @ezman700 Thank you …
    @ezman700 Thank you. i have been looking around and found a good deal with the Duemilanove as i only want to make some simple projects to start with. thank you for your advice 🙂

  13. @mattx12345678 The …
    @mattx12345678 The Uno has slightly more memory and it can also provide feedback to the computer, like if you were going to make a computer mouse. It’s a $5 difference between the two, so you might as well go with the Uno.

  16. What arduino board …
    What arduino board is best, The Arduino Duemilanove or The Arduino Uno? The website that i went to said that the Uno is a replacement for the Arduino Duemilanove. They both cost the same so which do you think i should get?

  18. If I’m not mistaken …
    If I’m not mistaken, I think this one detects electrostatic charge. You can probably achieve same results with a FET, an LED and a battery.

  20. once u uploaded the …
    once u uploaded the code on the Arduino, can u disconect it from the USB and still work ? what about a power supply ?

  21. I USE THIS EMF …
    I USE THIS EMF DETECTOR…WHY? BECAUSE ITS…

    UNBELIEVABLE….OHHHHHHHHHHHHHHHHH

  24. Good work. Just out …
    Good work. Just out of curiosity, how could one convert this to real-world values? (Perhaps Gauss units?)

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