I was messing around with my Arduino board and figured out how to make a cheap portable electromagnetic field (EMF) detector. It only requires a led, 3300000 Ohm resistor, and wire. As I approach an EMF the led gets brighter, so I can locate the source. Messing around with the code and resistor values I can change the sensitivity of the device; when I first made the EMF detector I could only find one place to stand in my apt where it didnt go off. I am working on getting a commercial EMF detector that spits out quantitative values so I can calibrate my version and have it do the same on a LCD. *UPDATE you can decrease the sensitivity of the device by making a loop with the antenna. Also the code can be found on my website, aaronalai.com
I suppose you could do that 🙂 I buy the 500-Piece 1/4-Watt Carbon-Film Resistor Assortment Pack from RadioShack. The pack will have 5 3.3 MEG resistors in it.
My website has a photo which should contain enough information to build the project.
I would have to disagree, although I can see why you might think that. You should try building one to test different sources of EMFs. It’s a simple and fun project that is a great way to get into microcontrollers.
Please send for me Schematic!
Thank U very much!
3 300 000 ohm?
holy shit.
3300 K?
are you serious? where do you get resistors that high?
oh, my multimeter goes upto 2 000 000 ohm, and in my bin of resistors i found one that maxed it out. ill try it.
Any electronics website mouser, digikey ect…
3,300,300 ohms is only a 3.3 mega ohm resistor nothing really special just a high resistance. Radioshack has them in the 500 pack if you don’t wana buy online!
I built this and it works pretty good, I didn’t get very good reception though but it did detect EMF fields at close range.
yea i found one in my bin of resistors (its higher than 2 mega ohm anyway, because it maxed out my multimeter)
and i built this and it worked. it detected my tv easily.
I was able to make this without using a resistor by just making some changes in the code, it works great.
hello, i am from mexico, i really like it your work, i try to do my own detector but didnt work well, could you please let me see your work? i hope that you have a really good week and thankyou for your attention and kindness. :d
do you know how to build one (if possible ) on a board of education with a basic stamp 2 from parallax?
Damn. That’s a lot simpler than I would have imagined and it works great! 😛
“she’s quite staticky” :) 🙂
Hola me podrías ayudar a construir uno como este ??? es para la escuela me están pidiendo uno y no encuentro diagramas o algo parecido.
saludos
Oh Yeah !!! You pat your pussycat, make to electirc static
Hey which is the best material to be used as the antenna? thkns!
hello biltoddthesciencegod.. can this circuit detect unintentional radiation that emit from ict devices? can i have your schematic circuit?? if u are feel free, please email me at:
citra_malaya@yahoo.com
thx so much.
LOL! “She’s a bit staticy”
great video!
LOL! “She’s quite staticy”
Great video
Hello, could you please put on an explanation for how it works? It would be great. Thank you.
@Milegolasss
check this out, this video takes inspiration from this one 🙂
cheers
/watch?v=y1Bke3750WE
I built this using the Arduino Nano v3.0, and you don’t need the resistor.
This thing is Ultra Sensitive!!!!
Just rubbing my big toe on my chair mat, it’s one of those plastic see thru ones, the detector picks that up!
I’m experimenting with a few cool things on this, and I would have to say, this is not only easy, it’s awesome!
Thanks for the upload!!!
Next i’m going to try the LCD version.
I couldn’t find anything closer lying around, so I actually had to string 3 1M’s and 3 100k’s together to have this work.
I have the same arduino and laptop lol
Would this be possible with a Parallax Quickstart Board. Ive found its somewhat similar to the Arduino. But the code is in proppelor and spin. One benifit is the board does have 8 LEDs on it already and can be individually programmed.