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Author Topic: Single AA battery to light WHITE LED for long-long time  (Read 185883 times)

amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #165 on: March 30, 2008, 05:02:27 PM »
@Feynman,

Hmm, as far as I can tell that circuit worked, but it is an older version and I might have made a mistake when I was converting from the proto-board setup to a circuit schematics. I apologize if this caused you inconvenience and trouble getting it working.
You are right that the driver leads need to be reversed in order for the setup to work. Button is used to kick the circuit in because it would not self-oscillate on its own upon power for me, but then again the setup was not reversed to begin with...

The circuit works, I will put a photo into the next post...

@Marco,

Thanks for the details, so basically we can use the motors as spark gap for our present setup since our voltages for LEDs are no-where near HV?

turbo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #166 on: March 30, 2008, 05:40:23 PM »
Hi Amigo

Well i guess so....
The mechanical spark between the two rotating needles of the motors produces a diffrent effect then the micro HV spark gap.
The resistance between the two rotating needles is constantly changing in a noisy fashion.
It's like a bad connection that never comes to a good pathway.
It has a certain smell when it is going and so does the micro spark gap but this is more likely ionization and ozone production.

Basicly i use 3 methodes to get to intresting results.
These are:

1. mechanical - moving parts in the circuit.
2. spark gap   - involves voltage to pass the threshold.
3. bemf          - pulse a coil with a low voltage signal and collect a high voltage bemf spike.

Methode one is grosly inefficient as you need power to drive the motors and it's mechanical so the parameters are changing all the time, it's not stable.
Methode two is hard to tune and some of the energy is lost in the form of heat, it also reacts to the environment like humidity and dust.
Methode three is best because there are no moving parts but it is sensitive for leaking, if there is some capacitive coupling the energy will be gone in a nanosec and even holding a wire destroys the effect.
In all three methodes the goal is to create a point of charge diffrence between a point in the the setup and a point in the environment.
This is like creating a sink so the energy starts to flow in.
Much like punching a hole into a baloon so the air comes out.
This charge diffrence is needed because we and everything around us is charged to the same potential.
We are sitting on only one plate of the gigantic capacitor.
So we can:

1. Take a wire up to the end of the ionosphere and connect it to the other plate (not pratical and quite dangerous)
2. Establish resonance (also not practical as we look into the sizes of the wavelengths)
3. Create a pressure diffrence.

Now pressure diffrences are evreywhere, and when they get too big it just flashes over between the plates in the form of lightning.
The pressure zone is electric (ambient potential), but as soon as it discharges by lightning, the energy is radiated away in magnetic form.(Schumann-Resonance).

M.




amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #167 on: March 30, 2008, 05:50:01 PM »
Ok here are the photos, I've just put the circuit together quickly and it works.

(http://img296.imageshack.us/img296/7146/amigojoulethief2su1.jpg)

(http://img296.imageshack.us/img296/5868/amigojoulethief3fj3.jpg)

The circuit will work either with reversed or not-reversed driver leads, but in my configuration (straight connection) it appears to use ~600uA less (through battery) than with the reversed connection. It depends what frequency it clocks in I guess so it probably means nothing and we can ignore it...

The LED is extremely bright and it's daytime here - you simply cannot look at the LED directly above or you'll get burn image in your eyes after a few seconds.

sanmankl

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #168 on: March 30, 2008, 05:59:52 PM »
Hi,

I build the circuit following Groundloop's schematic (trifilar) and after testing it with various npn transistors, this is what I found out.

This circuit is driving 9 5mm white LEDs. No matter how many LEDs I put in (I only have 9), the amp remains the same. I would have thought that the more LEDs I hook it up, the dimmer it will be. It doesn't. Is this normal?

- 2N3904, lowest current comsumption at 30mA. LEDs. Dimmest but still bright enough to see "white" and not green tint when it's not enough power.
- 2222A, higher comsumption at 65mA (tried another 2222A, it goes up to 75mA)
- BC548, 2nd lowest at around 60mA
- BC337, highest at 80mA

Frequency as suspected, changes with various transistors.lower frequency, lower current consumption.

Right now, I'm putting the circuit (2N3904) to on test-run for time until battery runs flat (it's a NmH 1V2 batt). So far, it's running for 4 hours. Too early to tell anything.

Cheers, cp


amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #169 on: March 30, 2008, 05:59:56 PM »
Marco,

Thank you for the break-out of the methods, I just wonder why some people still prefer spark gap over pulsing the coil...there's lots of talk about hydrogen spark gaps, etc...

Also, if we were to encase the micro-gap into a glass ampule and (partially) evacuate the air wouldn't that prevent atmospherics from interfering with it?

amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #170 on: March 30, 2008, 06:06:32 PM »
@sanmankl

You really need to measure the hFE of the transistors you use because it makes a difference (bigger the better). I've noticed 2N2222 works better than 2N3904 though your current consumption is way too high, even 30mA is more than a standard Joule Thief circuit and not even my modified version which runs at about 12-13mA.

Actually in my latest incarnation of the circuit, there's no need for 1K resistor because I am using a 2N7000 N-FET which seems to be giving much better amplification than standard NPNs. Circuit uses standard 20 turns of bi-filar 30-34 AWG on a miniature ferrite bead/toroid core. Also, the current consumption has fallen down below 10mA (around 8-9mA depending on the oscillating frequency).

I believe our goal here is to get the LEDs to be the brightest and connect as many as possible, with the lowest current consumption thus prolonging the battery life.

turbo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #171 on: March 30, 2008, 07:08:03 PM »
Marco,

Thank you for the break-out of the methods, I just wonder why some people still prefer spark gap over pulsing the coil...there's lots of talk about hydrogen spark gaps, etc...

Also, if we were to encase the micro-gap into a glass ampule and (partially) evacuate the air wouldn't that prevent atmospherics from interfering with it?

Well i have also used NE2 bulbs as THE spark gap.
I just discharged a full capacitor into the bulb.
This creates a violent blue flash rather then an orange glow, but the bulb didn't like it...it's now in the damaged components collection.
Anyway at high voltage it's a dielectric thing, you can pick up a NE2 bulb and it will even glow brighter as the energy flows from your finger thrue the glass and into the bulb, or the other way around.
Much like those plasma globes with all the sparks inside.
Those are glass too.
But, i think indeed it is best to use open air spark gapping as i also think it needs to be in contact with the environment.
However if we go into the Radiant energy area, it will just penetrate about anything.

M.

turbo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #172 on: March 30, 2008, 07:16:09 PM »
Hi,

This circuit is driving 9 5mm white LEDs. No matter how many LEDs I put in (I only have 9), the amp remains the same. I would have thought that the more LEDs I hook it up, the dimmer it will be. It doesn't. Is this normal?


Hi

Do you think that is normal? i think it's magic.
I have seen the same thing many times....one time my whole room was filled with UV solar tubes all in series and it did not matter how much i connected they all lite up..

It looks as if the power feed only acts as a catalyst to establish the connection.
My next step is to focus all that light onto a little solar cell to see what it put's out, as you know solar cells are only about 15% efficient.

M.

broli

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #173 on: March 30, 2008, 08:37:15 PM »

Hi

Do you think that is normal? i think it's magic.
I have seen the same thing many times....one time my whole room was filled with UV solar tubes all in series and it did not matter how much i connected they all lite up..

It looks as if the power feed only acts as a catalyst to establish the connection.
My next step is to focus all that light onto a little solar cell to see what it put's out, as you know solar cells are only about 15% efficient.

M.

This is quite a coincidence since I was trying to get the following post through, but it was giving me a hard time...

Quote
This might sound funny but maybe you could try and hang a small sollar cell, like those found in calculators,above the leds (works probably best with white leds). If this led is bright for a very longer time than it should be then maybe just maybe you can extract an intresting sized amperage from the solar cell.

Good to hear someone is actually going to give it a go.

Groundloop

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #174 on: March 30, 2008, 09:02:27 PM »
Hi,

I build the circuit following Groundloop's schematic (trifilar) and after testing it with various npn transistors, this is what I found out.

This circuit is driving 9 5mm white LEDs. No matter how many LEDs I put in (I only have 9), the amp remains the same. I would have thought that the more LEDs I hook it up, the dimmer it will be. It doesn't. Is this normal?

- 2N3904, lowest current comsumption at 30mA. LEDs. Dimmest but still bright enough to see "white" and not green tint when it's not enough power.
- 2222A, higher comsumption at 65mA (tried another 2222A, it goes up to 75mA)
- BC548, 2nd lowest at around 60mA
- BC337, highest at 80mA

Frequency as suspected, changes with various transistors.lower frequency, lower current consumption.

Right now, I'm putting the circuit (2N3904) to on test-run for time until battery runs flat (it's a NmH 1V2 batt). So far, it's running for 4 hours. Too early to tell anything.

Cheers, cp

@sanmankl,

No, that is NOT normal. Can you be more specific? When you say current did not go up did you mean the input current from the battery to the circuit? Also can you give some values to your measurements?
Measure the input current in mA and then add some more LEDs to the output. Did all your LEDs light at the same level? Etc.

Groundloop.

Feynman

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #175 on: March 30, 2008, 09:42:14 PM »
@amigo

Okay I will double check my circuit.  Thank you for going back and reconstructing it and posting the photos.


@sanmankl

I think normally adding more LEDs should increase current consumption. Adding more LEDs without increasing current consumption might happen, if the aggregate brightness reduces by an exactly proportional amount.   This is just a thought though.  The results you were getting are interesting, I look forward to hearing more about your results.



hartiberlin

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #176 on: March 30, 2008, 09:48:08 PM »
A spark gap from 2 dissimular metals like graphite and copper
produces a galvanic cell when a spark ( plasma) jumps.
The spark acts like the electrolyte in a normal battery.

This way you have a "galvanic battery" in series with your circuit and
can draw "free" electrons from it, which come into your circuit and will
recharge your battery.
You are probably using up the graphite and the other metal due to
oxidation and corrosion, but this is the source of free electrons which will
charge up your batteries.
Quite simple, if you have understood it.
The same effect is true in all the Newman machines, that used big sparking
commutators from copper and graphite brushes..

This way also a direct conversion of graphite can be done to electricity.

Regards, Stefan.

amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #177 on: March 30, 2008, 10:44:54 PM »
Hi Stefan,

I'm going to try and build a simple micro-gap using two pencil graphite rods, as Marco outlined, spaced by a "hair". No microscope here so it'll have to do for now, but hopefully something actually happens when it's plugged in... :)

hartiberlin

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #178 on: March 30, 2008, 11:03:52 PM »
Okay, if just 2 pencils do not work,
then try pencil onto copper.
Or pencil onto lead solder.

amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #179 on: March 31, 2008, 01:17:16 AM »
Here's my attempt at creating a miniature spark gap using two graphite pencil rods. I used a hair (thankfully I still have some left on my head :) ) as a spacer between the electrodes, and wrapped tinned 34 AWG wire around the other ends, then hot glued them to a small piece of plexiglass.

So now what do I do with it because from what Marco said we should either pulse the coil or use the spark gap but not both?

(http://img339.imageshack.us/img339/5813/amigomicrosparkgap1ff4.jpg)