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Author Topic: FBCS-Series, A Lighter Touch--Zero Input Power  (Read 17526 times)

MeggerMan

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #15 on: January 14, 2007, 01:55:52 AM »
Hi Spherenot,

Yes, here it is, see photo below.
If you earth the +ve side of the scope input you can get a 1V peak-to-peak.
On 2uS division you get a pulse followed by a decreasing amplitude of pulses for about 3 divisions.
If you apply a 1K resistor across the input the amplitude goes down, but not that much.

If I sandwich normal CDs either side the amplitude is not as strong.
You are better off with an open coil. I think the aluminum introduces unwanted coil capacitance.
 
I think if connect several together in series I may be able to light an LED.
It does work though, very impressive.

The scope shot is 0.2V /div so thats about 0.9 V


Regards

Rob

Spherenot

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #16 on: January 14, 2007, 02:18:07 AM »
Yes, here it is, see photo below.

Okay, I will not be posting the picture of my device with the top CD broken off.  Your picture is much more pleasing to the eye.  8)

kingrs: Place the device between your palms.  Do you see an amplitude increase as well?

One more thing.  When I place my device on a steel slide-out surface of my old steel desk, I see an irregular waveform pattern with a lower amplitude and a higher frequency.

Your waveform does not look like a smooth sine wave.  Try placing the unit on your knee.  Put your hand on top.  Do you get a higher amplitude sine wave?

When I do this my amplitude jumps to 50 mV peak-to-peak.  I did not mention this larger value in my initial post because of my human interference.  When I place the unit away from the steel desk and  away from me I get a steady 10 mV.

What strange things are you seeing?

What frequency are you getting with your 'body' antenna?

pucella

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #17 on: January 14, 2007, 02:43:16 AM »
I was experimenting with pancake coil (tesla patent)
I am using copper tape like:
http://cgi.ebay.co.uk/Guitar-pickup-self-adhesive-copper-foil-tape-sheilding_W0QQitemZ270076479422QQihZ017QQcategoryZ42455QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
It is easy to play with.
Amazing increase of magnetic field from same numbers of turns.
I will try thre coils to connect instead of two.
Best George

Spherenot

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #18 on: January 14, 2007, 03:04:25 AM »
(5280 feet/mile) * (186,282 miles/second) / (1.43x10^6 cycles/second) = 688 foot cycles

I want to make a new unit using 688 feet of wire, which I calculate to be the wavelength of 1.43 MHz above.

But, as usual, I get these ideas on Saturday night.  Everything is closed on Sunday.  I have 200 feet of 30 ga. mag-wire available tonight.  I am thinking of making FBCS-30-4W.  The 4W stands for 1/4 wavelength of 688 / 4 = 172 feet.

I wish I had two spools of this wire so I could fix them both overhead on a rod and feed then to the pancake as needed.  I may not be making a new coil this weekend until I get me some more spools-o-wire.  :-[

Have fun.  Good night.

argona369

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #19 on: January 14, 2007, 04:10:47 AM »
.
« Last Edit: September 11, 2007, 02:32:55 AM by argona369 »

retrod

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #20 on: January 14, 2007, 04:45:41 PM »
I am wondering if maybe, just maybe the 1.43mhz wave you are seeing could be a local AM broadcast station (1430khz = 1.43mhz). Have you tried to demodulate the signal by attaching an audio amp to listen, or checked your local spectrum with a radio?
Just a thought,

RD

Spherenot

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #21 on: January 15, 2007, 01:38:30 AM »
That?s the velocity in free space though.(it will be to long)
You want to compensate for velocity running through wire,,

Try Google search for ?antenna calculator?
And don?t be surprised that different  calculators give different numbers.

I should have looked into this before I built pancake number two last night,? and this morning.

Yes I did it. All 172 feet of it using 30 gauge enamel-coated magnet wire.

I fixed a broom to the garage wall and a large C-clamp to the workbench last night at a measured distance of 21 feet 7.5 inches apart.  I looped the wire around the broom and the clamp 8 times, for a total of 173 feet.  (I wanted an extra foot to give me more options in cleaning-up the final connections.)  I cut this in half as I wound each half on it's own spool.

I fixed the spools on a axle overhead.  It did not feel right; the wires would be pulling up.  So, I fixed the spools to my right instead.  Much better.  (But, as I learned later, they were too far away.  The wires coiled off the spools and acted like springs.  They would pull the freshly laid wires up over the pancake-coil before the super-glue had time to dry.)

I carefully arranged and taped my central lead wires on the back, (with hub ridge,) of a clear CD, through the hole.  I flip over the disk, uncrossing the wires that lead to each spool, as planned, and pat myself on the back.

I took a deep breath before starting to wind and noticed how much wire was on them spools.  I looked at the CD.  I looked at the spools again.  Hmm, I never did calculate how much radius I would need for this trick.  I was assuming that skinny-ass 30 gauge wire would fit.  Calculation showed?

I needed another 5.7 mm radius on the CD.  Whew!  I was sure glad I ran that calculation before I cracked open that glue.

My Easter-egg hunt for a replacement yielded only paper plates.  (There goes my naming convention.)  I found the center and drilled thru four plates.  I epoxied a laminate of two plates with weights to maintain flatness and rigidity.  I used the other two plates underneath for extra support during assembly.

I threw together a quick fixture with six-too many screws I thought I would need for 'hold down wires' crisscrossing over the growing pancake.  I ended up not trying this feature fearing the glue would stick to these wires.  But, three of the screws came in handy for other fixturing methods later on.

Two screws were reused as spool posts when I moved the spools to the fixture to reduce that annoying spring action I was getting while winding.  This worked.

I fixed a magnet and two washers to a third screw to guide the wires from the spools, which were further away, to the edge of the plate surface.  Later, I used one wire between screws to hold the wire closer to the plate surface.  Blah, blah, blah about the fixture.  (Photos included.)

Anyway, I went to bed this morning at 4:30 AM.  Pancake half wound.  Up again at 9:00 AM winding.  Finished.  Seven hours just winding with a chopstick and superglue.

My right eye is blurry.  It may have received too many super-clue vapors.  Yes, this makes typing difficult.  My body hurts.

"Uncle,"? for now.

Spherenot

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #22 on: January 15, 2007, 02:27:23 AM »
I am wondering if maybe, just maybe the 1.43mhz wave you are seeing could be a local AM broadcast station (1430khz = 1.43mhz). Have you tried to demodulate the signal by attaching an audio amp to listen, or checked your local spectrum with a radio?
Just a thought,

RD

1460 kHz and 1480 kHz are strong stations around here.  Do you think that one or both of these is the source of the sine wave?

When I tune to 1430 kHz I hear a faint blending of many stations.

How do I demodulate the signal by attaching an audio amp to listen?

I just got my scope.  Maybe all I did was make an antenna.

Can someone please show us how to do just that; make a simple antenna for an oscilloscope so we can "see" an AM radio broadcast?

« Last Edit: January 15, 2007, 02:51:58 AM by Spherenot »

retrod

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #23 on: January 15, 2007, 03:31:05 AM »
 Attached is a schematic of a simple crystal radio. The diode is a 1N34. Lets say you don't need the cap or external antenna because you are making a coil tuned to the precise frequency. The speaker shown is normally a high impedance crystal earphone.  As you can see the simple set needs no other energy to operate, it comes from the stations transmitter. I think you can attach an audio amp in place of the crystal earphone as a test to hear the signal. I have heard of crystal sets being built with large inductors that can actually light an LED when tuned to a carrier, I have not seen this in person or know of a schematic on-line. It would be a neat trick if it could be accomplished.

RD

MeggerMan

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #24 on: January 15, 2007, 02:13:50 PM »
Hi Spherenot,
Very impressive winding that many turns onto the back of a paper plate!

Try your scope on some of the lower frequency settings.
I think it may have been 1ms/div.
I saw what looked like a train of square blocks of two different sizes.

I think you could use some ordinary CDs as the variable capacitor, just slide them in and out across the windings to increase/decrease the capacitance.
Or make and air spaced variable capacitor from some sheets of 0.4 - 1mm aluminium, bolts + washers or spacers.
Even some copper clad board would work.

Then you need a signal diode as shown in the diagram.

Using a set of PC speakers with a built in amp should work to amplify the output enough, certainly my Logitech speakers give off a loud mains hum if you unplug then from the sound card and touch the 3.5mm jack plug.

You may need to check you have any wifi kit turned off too.

Regards
Rob

tomas

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #25 on: January 15, 2007, 02:51:17 PM »
Attached is a schematic of a simple crystal radio. The diode is a 1N34. Lets say you don't need the cap or external antenna because you are making a coil tuned to the precise frequency. The speaker shown is normally a high impedance crystal earphone.  As you can see the simple set needs no other energy to operate, it comes from the stations transmitter. I think you can attach an audio amp in place of the crystal earphone as a test to hear the signal. I have heard of crystal sets being built with large inductors that can actually light an LED when tuned to a carrier, I have not seen this in person or know of a schematic on-line. It would be a neat trick if it could be accomplished.

RD

here is what they call an "ambient power module"
it supose to put out 36 volt/9 watts.

http://www.youtube.com/watch?v=5mpYl3Yk8a8
http://peswiki.com/index.php/OS:Ambient_Energy_Collection_Device
http://www.angelfire.com/ak5/energy21/ambientpower.htm


hartiberlin

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #26 on: January 15, 2007, 03:07:21 PM »
36 Volts and 9 Watts is very much overexagerated...
Maybe during a very heavy thunderstorm and with a
very long and high antenna, but not normally.

Have a look at the "Stromsauger":

http://www.t-spark.de

He could only light up a few LEDs very dimmly
with it and the power is normally only in the mikro to milliwatts
range...

Otherwise you would need an antenna with electret effect
to attract free electrons, then you could gain some
more charge and so some more output power...

Regards, Stefan.

Spherenot

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #27 on: January 15, 2007, 05:13:47 PM »
gyulasun & argona369, I still need to locate those pF cap's and variable cap's that you asked me to try.  Is this something in which you both are still interested in seeing?

Yamanashi Jr, have you tried a cilinder type also insted of a flat coil?

pucella, how is that copper tape working out for you?

retrod, thanks for the crystal radio schematic.  I had been meaning to look this up for a time.

kingrs: "Try your scope on some of the lower frequency settings.
I think it may have been 1ms/div.
I saw what looked like a train of square blocks of two different sizes."

I did this.  The only time I see what you are seeing at 1 ms/div is when I disconnect my coil.  Do you have continuity throughout your replication?

However, when my coil is connected at this 1 ms/div setting I see packets of waves seeming to move in both directions on my scope.  These may be radio waves.  I will try to find a way to jack my coil to an off-the shelf amp.

Your waveform does not look like a smooth sine wave.  Try placing the unit on your knee, after checking continuity.  Put your hand on top.  Do you get a higher amplitude sine wave?

What frequency are you getting with your 'body' antenna?

The FBCS-22-2D.A has a measured resistance value of 0.3 ~ 0.5 ohms.  (~25 feet--22 gauge solid hook-up & lead wire)

The FBC-30-4W has a measured resistance value of 18.2 ~ 18.4 ohms.  (171 ft., 8 in.--30 gauge enamel-coated magnet wire)

I will post pic's and results of the completed FBC-30-4W later.

Anyone care to guess which device picks up a stronger signal?
« Last Edit: January 15, 2007, 05:55:15 PM by Spherenot »

gyulasun

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #28 on: January 15, 2007, 06:12:28 PM »
gyulasun & argona369, I still need to locate those pF cap's and variable cap's that you asked me to try.  Is this something in which you both are still interested in seeing?
....Anyone care to guess which device picks up a stronger signal?


Hi,

Yes because this way you could make sure you tune to the biggest signal amplitude just like in case of a parallel tuned resonant circuit is fed by a signal generator and you search for voltage maximum by turning the knob of the generator.
Because your scope input capacitance is around 30-40pF this adds in parallel to your pancake coil  and make it off-tuned, even if you use a 10:1 probe, it has a 14-15pF self capacitance too and cause off-tuning with respect to your calculated resonant frequency.

Your FBC-30-4W coil is supposed to pick up a stronger signal, however I wonder it will be of the same frequency like that comes from FBCS-22-2D ??

thanks

Gyula

argona369

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Re: FBCS-Series, A Lighter Touch--Zero Input Power
« Reply #29 on: January 15, 2007, 11:58:38 PM »
.
« Last Edit: September 11, 2007, 02:25:17 AM by argona369 »