http://www.abovetopsecret.com/forum/thread438696/pg1
Quote from: FreeEnergy on July 11, 2010, 02:44:42 PM
http://www.abovetopsecret.com/forum/thread438696/pg1
Auckland North Shore Hum
http://www.massey.ac.nz/~tjmoir/hum.html
+
and something like this
http://www.dself.dsl.pipex.com/museum/comms/ear/ear.htm
There is already a Patent application for a Ambient Noise Power Generator.
http://www.google.com/patents/about?id=Gs6SAAAAEBAJ
Although the circuit would be need to revised to be usable. A large parabolic dish would help also.
what modifications would need to be done to this circuit to make this usable?
Hi Smoky,
The circuit looks off too me, there would be leakage current through the speaker to ground. I would place a germanium diode between the receptor and cap.
A array of these in a parabolic dish pointed at a busy airport, highway or a waterfall would generate some power.
what about this?
Quote
...
http://www.google.com/patents/about?id=Gs6SAAAAEBAJ
...
Rather strange: the inventor is expecting to charge a battery with AC, he forgot the diode between the microphone and the battery. And why the ground connection?
With a diode the principle should work in theory, but the level from the microphone is surely less than the diode threshold (except on an airport runway :)).
Do I miss something?
Quote from: DreamThinkBuild on July 12, 2010, 11:27:03 AM
Hi Smoky,
The circuit looks off too me, there would be leakage current through the speaker to ground. I would place a germanium diode between the receptor and cap.
A array of these in a parabolic dish pointed at a busy airport, highway or a waterfall would generate some power.
i've always been interested in converting sound energy into electricity.. theres so much ambient sound in our man-made environment (and some natural environments too).
what about utilizing a cavern/echo effect? would that create then, more sound energy for the reciever to pick up, from any given source?
we need to build a VERY large microphone.. like the size of a 12" speaker.
something that can create a great deal of coil-movement from the sound source.
i guess i was looking at the battery as being backwards in the patent circuit. i think the "leakage" current is intentional.
since the microphone generates electricity in both directions, going inwards it would charge the cap, then immediately discharge the cap as the microphone moved outwards, push it stronger than the sound waves did on the way in (double minus losses?), its almost like a self-rectifying circuit.......
Hi All,
I built this circuit both ways with and without the diode.
I used a 10uf Electrolytic cap to represent the battery(I'll call it C2), that way I could discharge it to zero.
I used a 2nf cap as C1
Okay the first problem I ran into was all my speakers I tried could not generate enough power with the original design. I went and used my piezo speaker which worked good. Puts out about 40v-50v spikes when slammed.
Now without the diode and the scope probes(20mv div setting) across C2 in DC mode, when I hit the piezospeaker it would quickly jump in voltage maybe about 5-7mv but it would quickly drop down below the baseline(10mv). No matter how many times I hit the speaker it would not gain a charge. This confirms there is leakage current through the speaker.
Okay now for the odd part, I placed a Germanium diode(1N60) between the speaker and C1 and slammed again C2 did go up but slowly dropped back down. Maybe faulty(?), I have to go scavenge another one and try again later. I tried a regular diode a 1N4148 and C2 started to charge on each slam getting up to only 100mv before I stopped.
Redesigning the circuit I removed C1 and placed the diode between receptor and C2. Doing this gave full power from the piezo speaker to C2. Just blowing hard across the piezospeaker would raise C2 a couple millivots. Slamming it would raise C2 500 to 700 millivolts. Several slams and C2 was up over a volt. Removing C1 also allowed my speaker and microphone to start charging C2 a little slower than the piezospeaker. A larger speaker should work better as Smoky suggested.
I'll have to do some more tests with this. It is such a simple circuit, yet it's charging the cap. What I find interesting is unlike a antenna based cap charger, which is linear charging over time, the voltage in the cap will raise quickly with loud noises(non linear).
If you want to try this just replace C1 with a diode and the battery with a large cap or ultracap. If you find any other ways to improve this circuit share it here.
Hi Smoky,
I like the idea of using the echo from a cave.
@ Dream
thanks for the results of your work. great job.
i would like to try this with a [edit] Microphone-type device designed to collect sound. while a speaker should in theory "work"... it is engineered to create sound. (reverse of what we're wanting to do here). and so i do not think it can harness the full power of an incomming wave.
that being said, i will dismantle a mic and perform similar experiments. soon as i replace my meter ( testatika conversion gone bad...).
Quote from: sm0ky2 on July 14, 2010, 05:17:26 PM
@ Dream
thanks for the results of your work. great job.
i would like to try this with a [edit] Microphone-type device designed to collect sound. while a speaker should in theory "work"... it is engineered to create sound. (reverse of what we're wanting to do here). and so i do not think it can harness the full power of an incomming wave.
that being said, i will dismantle a mic and perform similar experiments. soon as i replace my meter ( testatika conversion gone bad...).
IMO the solution is to use different pipes with different resonances
http://home.cc.umanitoba.ca/~krussll/138/sec4/resonanc.htm
if you put the pipes in the wind can produce energy and pleasant sounds
http://www.sarahtulga.com/Glock.htm
i brought this idea to a fellow engineer who designs sound-rooms, recording studios, theaters, ect.
what he said was intreresting, so i thought i would share it with you guys.
basically, the "sound-proof wall" is a wall segment that is suspended at the top and the bottom, so it is free to move back and forth.
with a "fixed" wall, soundwaves whos wavelength is longer than the span of the room ,will travel right THROUGH the wall!!
with the sound-proof wall, soundwaves strike the wall, and cause the suspended wall to MOVE!. absorbing 100% of the sound.
if we were to attach a magnet or generation coil to the moving wall, this could be used to absorb a great deal of the ambient noise in a given environment, and at the same time generate electricity, by placing one of these walls between the source of the sound and the intended "quiet zone"
i.e. alongside a highway.
heres my sketch of what these walls are supposed to look like.
( that is if you can get past my horrible artwork, and see what it is showing)
my main concern is the total mass of the moving wall,. for this application, the wall needs to be very light-weight, so most of the energy is applied to the coils/magnets.
Hi Smoky,
Testing some more I find a lot better results with the piezo-speaker than any of the regular speakers or microphones I have.
This company sells piezo film, which could be suspended as a panel.
http://www.imagesco.com/catalog/sensors/piezo.html
It is thin and lightweight so it might work.
Piezo was my first thought on this. Coiled tubing with water or crystals within an acoustic resonance chamber,think acoustic guitar,coupled to the Schumann resonance somehow might give multiple overtones. Water or liquid is a better conductor of sound than air. Some type of JT scheme might even work some way.
Hi Wings,
Actually I have some metal tube wind chimes on the side of the house mounting a piezo-speaker inside would be a good test. Although the only time I get wind around here is when it storms.
Hi IotaYodi,
Thanks for the suggestion of using water. I have a large stainless steel mixing bowl I picked up from a tag sale. I can fill it with water and try. Should resonate pretty good with a solid hit.
@All,
I stumbled across these little vibrating disk motors(3vdc 80ma draw,running around 12,000 rpm).
http://www.solarbotics.com/products/vpm2/
Something to try with these little vibrating motors would be to sandwich it between two large piezo-speakers.
Could a modified Joule Thief, by stepping down the voltage through a secondary, run these little motors?
peizos are different, in that they are "reversable".
unlike normal speakers, which would waste a lot of energy trying to use them as "recievers".
its interesting to hear that peizo speakers work better than an actual microphone. i'll have to look into this.
rochelle's salt can be grown at home, into whatever shape and size cryatals that you want. im getting pretty good at manipulating the crystal growth,. perhaps we can design our own "custom" peizo reciever/generators......
and for the Tesla fans out there,. those little vibro-motors can be Dangerous (heh heh heh)