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
super cool
super cool
do not insert into …
do not insert into wall outlet!
Well,just like the …
Well,just like the device in ‘Super Natural’ for detecting the devil….
@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
@station2station …
@station2station But speakers use magnets, so they will cause interference.
@jonjon50088
But …
@jonjon50088
But you could still use it to detect wiring before drilling a hole in the wall.
Cool project and …
Cool project and awesome chops!
Bellissimo! how …
Bellissimo! how much?xD
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…
what kind of …
what kind of baterry are you using to power the arduino
you could also make …
you could also make this with an op amp.
@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 🙂
@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.
Sorry, but this is …
Sorry, but this is NOT a electroMAGNETIC field detector.
nerd
nerd
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?
I think I should …
I think I should get an arduino some time.
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.
Very cool project.
Very cool project.
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 ?
I USE THIS EMF …
I USE THIS EMF DETECTOR…WHY? BECAUSE ITS…
UNBELIEVABLE….OHHHHHHHHHHHHHHHHH
ultranerd get a life
ultranerd get a life
nerd
nerd
Good work. Just out …
Good work. Just out of curiosity, how could one convert this to real-world values? (Perhaps Gauss units?)
kipkay?
kipkay?