Electronic dowsing rod

[WM6]

Here you are real, complete, easy to build and working schematic. No empty block diagram.

Schematic represent kombination of (rost free) steel U shaped dowsing rod with electronic sensing amplification tuned on target resonating frequency. Dovsind rod data: rod (steel wire) diameter 4.5mm, lenght 45cm, distance between U shapped rods 45mm. Ferrite rod antenna (F) have to be fixed (glued) at 4,5 x inner rod distance from both rod junction (at about 20cm). Coil is tunable to resonate on different target (have to be tested on individual final construction). It is suitable to pistol forming construction. L1 = 180 windings Copper enameled wire 0.2mm on plastic tube inner diameter 5mm.

[Esteban]

Here you are real easy to build and working schematic. No block diagram.

Schematic represent kombination of (rost free) steel U shaped dowsing rod with electronic sensing amplification. Dovsind rod data: rod (steel wire) diameter 4.5mm, lenght 45cm distance between U shapped rods 45mm. Ferrite rod antenna (F) have to be fixed (glued) at 4,5 inner rod distance from both rod junction (at about 20cm). Coil is tunable to different target (have to be tested on final construction). It is suitable to pistol forming construction. L1 = 180 windings Copper enameled wire 0.2mm on plastic tube inner diameter 5mm.

Schematic can work. But small difference can't be sense. You can use beeper gen. for more sensibility. Another solution can be tune via collector (coil and capacitor) "frequency" of metals. 68 nF in series with 1K5 was used for tone for common speaker. These both components doesn't affects performance of the buzzer. Speaker is not very useable here due magnetic generation during detection, can be in opposition to "signal". Also common speaker can be produce a kind of microphonic effect in the circuit.

[WM6]

Speaker is not very useable here due magnetic generation during detection, can be in opposition to "signal". Also common speaker can be produce a kind of microphonic effect in the circuit.

Exactly, but as you can see I suggested piezo-ceramic buzzer not EM dinamic speaker, which can produce inductive feedback microphony.

[Esteban]

Exactly, but as you can see I suggested piezo-ceramic buzzer not EM dinamic speaker, which can produce feedback microphony.

I left the both resistor and capacitor if somebody decide to use speaker, but if somebody use speaker, then, this speaker must be out the pistol box, for example, in the waist of the person. With piezo also remain small microphonic feedback, so this must in the end of pistol.

[Esteban]

Tune in collector suggestion:

[Esteban]

Regarding your sketch, is not a dowsing rod. Is a pistol with antenna in "U".

[Esteban]

Buzzer in pistol:

[WM6]

Buzzer in pistol:

Of course, as you can see there are draving of buzzer holes on pistol housing and LED above its.

[FrancoItaly]

Hi All
There isn't connection between L1 and ground.
Best Regards

[Esteban]

Of course, as you can see there are draving of buzzer holes on pistol housing and LED above its.

Ahh! yes, now I notice it.

[Fred]

Tune in collector suggestion:

What frequency band would you tune the LC circuit?

[Esteban]

Hi All
There isn't connection between L1 and ground.
Best Regards

No. But you can make another U antenna wich content the sensor antenna.

[Esteban]

What frequency band would you tune the LC circuit?

In the range 80 Khz.

The problem is: how sensitive is this circuit for to show the phenomenon for small items? Maybe is good for big items.

[WM6]

What frequency band would you tune the LC circuit?

It is not enough to tune only one circuit.

Essence of use dowsing rods (and electronic rods too) is that instrument must be coordinated with the end-user during tuning and work.

So it is constructed as wideband and multimode tuning with very simple tuning operation to adopt dowser on electronic dowsing rod having regard to the selected target.

How to tune: it is two step: first we serch (outside in open) for nulling by slowly moving the U resonator back and forth to reach minimal response in buzzer and led, then we try with sample target to find response. If there is no response (change in buzzer or led) all procedure have to be repeated to other tunning position. After satisfied tunning we can start searching and check from time to time tuning status.

Even tuning procedure remind to tuning some MD coils, it is wrong to expect that this instrument work the same way as MD. It is not MD it is dowsing rod electronicaly upgraded. So use it as is. It is electronic dowsing rod intended to dowser use. Mean, to find something one must believe in dowsing, so probably for skeptic will not work. But worth to try, even for skeptic, it is cheap, easy to build in funny in use.

[Fred]

In the range 80 Khz.

do you mean 80mhz? because 80khz with a 200pf cap will give only a very small tuning range, and wound on air it will need an awful amount of turns...