Metal detector using 555 timer circuit
A very simple metal detector electronic project can be designed using a simple 555 timer integrated circuit . As you can see in the schematic circuit , this electronic project requires few external electronic parts .
This circuit detects metal and also magnets. When a magnet is brought close to the 10mH choke, the output frequency changes.
This metal detector project can be powered from a power supply that can provide an output DC voltage between 6 an 12 volt .
If a metal is closer to the L1 coil , will produce a change of output oscillation frequency, that will generate a sound in the 8 ohms speaker .
Comments
what kind of choke is this
Is an 10mH air coil,
dude it does'not effect a
is it necessary to use a 10mH
can we use another inductor
Yes you can use a coil with
what is actual frquency of
it continusly beeping with
Sound is generated anyway,
In which mode ic 555 timer is
This is working in astable
hi, I assembled the
Check your coil (it should be
function of 555 timer in this
I have connected the entire
Pin 4 and 8 of the 555 timer
pls post or mail the working
how many meters it can
Hoe this work can any one
instead of using 8 ohm
what output voltage waveform
but the speaker turns always
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