Tuesday, June 26, 2012

Electromagnetic field detector

Circuit diagram
Description:
This lovely circuit is a real gem! Easy to assemble and more sensitive than many commercial devices available. It's based around an LF351 low-noise operational amplifier and a 1mF choke acting as the sensor. Unlike most other simple EMF detectors, this one has a meter output for accurate reading, but alternatively, you can also roughly estimate the frequency of the field by plugging in headphones. It can detect any field from 50Hz to 100kHz, making it highly versatile and a worthwhile addition to any hobbyist's workbench.
Problems:
I just couldn't find any.
Possible uses:
Find out how far electromagnetic fields extend in your room, house, office...
Are you a ghost hunter? Then this is the circuit that you've been waiting for! Since it has been observed that appearance of a ghost tends to disturb the EMF, you can now detect any such changes with this little detector.

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2 comments:

  1. Coral rock may be an alternative in many PICs, although use of calciumcarbonate or sodium hydroxide is preferred. The ups backup batterycoral rock to be used shouldbe dead coral, preferably washed ashore which can be crushed finely andadded to the liquid requiring neutralization. If the ro ck is to be used, it shouldbe crushed into very small particles to increase the surface area so that the neutralization reaction can proceed as fast as possible. If large particles areadded to the acid it may take a lot longer for the same neutralization level tobe reached.

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  2. Awesome information! Thank you for sharing! For more of the product you can check out New Digital Electromagnetic Field Detector !

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