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Posts posted by gan87
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if u want inductance for inductor with some other core ( other than air)
Relative permiability must be found
it is no more "Mo"(air core)
it ll be "Mr"(relative permiablity) -
if ur inductor is solenoidal..
inductance - L
Number of turns - N
Mo = (4*pi / 10000000) ; pi= 22/7
ength of the inductor = x
Area of circular cross section = A
formulae
L = ( Mo*N*N*A ) / x
* - multiplication -
prateeksikka
i agree... simple relays can do tat...
but the thing is the field must be of great strength.......
its nt possible all time.. -
hi,
lost vikings
i feel ur post is the exact theory behind metal detectors,a weak rf range oscillator serves as the input,and sensing coil forms parts of tuned oscillator..
if u r interested in its working;
here it is..
when the coil is bought near a metallic object, magnetic energy is absorbed and oscillator fails to work. this can be detected by another circuit and alarm can be triggered -
i am frm india..
can anyone suggest me the procedure of getting samples ???
wer shud i cntct...
shud i pay the postal? -
u shud look over
1)connecting pin 4 to positive supply wen not in use........
2) grounding pin 5 wit a 0.01microfarad capacitor...(wen u r not using it)
MAGNETIC SENSOR...HELP!!!!!!!!!!!!!!!!!
in Theory articles
Posted
i guess magnetic sensors use magnetostriction effect......