Confirmation of OU devices and claims

[Grumage]

Hi Itsu.

Many thanks for " actually/physically " building this device.   

How were your 3 coils oriented to each other for the test?

Is it possible for you to try say one coil in a vertical position WRT the others?

The term " electromagnetic " has been bandied about, I'm wondering about " interaction " and possibly the physical separation distance of the coils might have an influence?

Cheers Graham.

[itsu]

Hi Grum,

the 3 coils are initially vertically positioned, but are flexible, see picture.

I did try severall positions and distances, but mostly the resonance frequency is influenced by that, not
the output amplitude or signal shape.

Thats why i am asking if i am doing something wrong and if this is the circuit Benfr has in mind.

Itsu

[Grumage]

Hi Grum,

the 3 coils are initially vertically positioned, but are flexible, see picture.

I did try severall positions and distances, but mostly the resonance frequency is influenced by that, not
the output amplitude or signal shape.

Thats why i am asking if i am doing something wrong and if this is the circuit Benfr has in mind.

Itsu

Many thanks Itsu.

Did you try with one coil laid horizontal WRT the others?

[gyulasun]

...
While your on can i pick your brains on NE555 any idea how i can get a 50/50 waveform out of a 555 without having to keep adjusting it with another pot and a diode or using a D type at double the frequency as I need a span of 30khz to 80 khz ?

Hey AG,

LOL    Just a brief answer because your question is off topic here: if you use a Schmitt trigger oscillator
with either TTL, CMOS, HCMOS etc chips you will have achieved your goal, see this link:
http://www.learningaboutelectronics.com/Articles/7414-oscillator-calculator.php
If you use say C = 1 nF  and R = 25 kOhm potmeter in series with a 15 kOhm fix resistor, the upper frequency
would be 80 kHz (when the potmeter is fully shorted) and 30 kHz when the potmeter is set to 25 kOhm
(so total R would be 15+25=40kOhm). Further possibility is using a 10 kOhm potmeter in series with
a 5 kOhm fix resistor when C=3 nF (2x 1.5nF in parallel) etc etc.  You will have a 50% duty cycle.
25 kOhm potmeters are at RS Components etc. Of course you can play with the calculator in the link
to figure out other values for your potmeters at hand.   

Gyula

[itsu]

Many thanks Itsu.

Did you try with one coil laid horizontal WRT the others?

Hi Grum,

yes, i did just now again and all kind of other combinations.
The load of the FG (50 Ohm) and the load of my bulb (100 Ohm cold) will dampen the resonance.

Only the resonance frequency shifts when changing distance and/or coil positions (horizontal/vertical)


Itsu