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Author Topic: Single AA battery to light WHITE LED for long-long time  (Read 185905 times)

sanmankl

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #180 on: March 31, 2008, 07:35:44 PM »
Quote from: Feynman 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.




@Groundloop/Feynman

Correct. The input current from the battery to the circuit remains constant i.e. 35 30mA with 1,2,3.... or 9 LEDs. LEDs all at same level brightness. I would have thought that the more LEDs you have, the higher current it consumes? Strange.


To add. The starting voltage is 1.229V and after 30+ hours, it's at 1.132V.

Cheers, cp
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turbo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #181 on: March 31, 2008, 08:50:15 PM »
You can imediatly tell when the spark gap is working because only then the light will be brilliant and it will have this "warm" special glow.
If it is not working the light only glows soft in closed and in open loop.

M.
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amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #182 on: April 01, 2008, 02:36:40 AM »
Hi Marco,

How should I wire this micro spark-gap, could you provide a sample schematic that we can base our future work on?

Thanks.
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superwave

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #183 on: April 01, 2008, 07:23:37 AM »

Any of you thinking to put a magnet in the circuit to increase the bright of the LED?
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turbo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #184 on: April 01, 2008, 04:12:06 PM »
I don't think magnets add anything to the circuit.
I do know Tesla using magnets to blow out the spark as fast as possible.

The spark gap was always across the NE2 bulb and as soon as it starts sparking, the light production doubles or tripels depending on the length of the spark.
I was always wondering if this was the radiant energy component i was looking at.

M.
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acerzw

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #185 on: April 01, 2008, 08:44:53 PM »
Quote from: -[marco]- on March 06, 2008, 07:58:09 AM
why is this in the tpu thread?


Tesla or Special-Coil Magnet Setups or Half-baked ideas, not related to SM's work, how many spark gaps in a TPU, the TPU lit multiple 100w lightbulbs not LEDs... how is lighting leds on the cheap going to get people off grid?

If we are going to resort to solar panels we all might as well throw out the circuit move to Spain and connect the solar panel directly to the led  ;) (or a wind turbine in less sunny climates) And we can store the excess energy in batteries for when there is no wind or light...

A
« Last Edit: April 01, 2008, 09:06:33 PM by acerzw »
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Feynman

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #186 on: April 01, 2008, 10:04:26 PM »
Originally it's in the TPU section because Zon wound the circuit on a toroid.  It's fine with me if Stefan wants to move the thread. 

But in broader terms, I think its clear this is all connected...  It's not just lighting LEDs, it's about doing experiments to understand nature.  For instance, Dr. Stiffler started with lighting LEDs and now he is doing one wire transmission of power to off-the-shelf motors. One must advance forward in iterations. ;)

Feynman
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amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #187 on: April 02, 2008, 01:35:01 AM »
Quote from: -[marco]- on April 01, 2008, 04:12:06 PM
The spark gap was always across the NE2 bulb and as soon as it starts sparking, the light production doubles or tripels depending on the length of the spark.
I was always wondering if this was the radiant energy component i was looking at.

M.

Hi Marco,

When you say across the NE2, which circuit are you referring to?

Thanks.
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hartiberlin

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #188 on: April 02, 2008, 02:02:11 AM »
Amigo,
looks good your sparkgap.
Can you still adjust the distance of the 2 rods ?
Looks still a bit far away for lower voltages...

Anyway, just wind an additional coil with more turns onto the torroid
and use this to pulse the High Voltage pulse during
BackEMF back via the sparkgap into the battery.

So the additional coil is in series with the sparkgap.

So when the high voltage is about + 500 Volts from
this coil, the spark jumps and connects the +500 Volts to
the + 9 Volts side of the battery and the other end of the coil
is directly connected to the minus side of the 9 Volts battery.
This way you pulse in this example + 500 Volts pulses
onto the + 9 Volts side of the battery and charge it up.

Hope this helps.
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amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #189 on: April 02, 2008, 03:09:57 AM »
Hi Stefan,

I think I'm getting the picture, though don't you need to rectify the output of the coil with at least a diode on one end of the coil (before the spark gap perhaps)?

Regarding my micro spark-gap, I can't bring the electrodes any closer, they are glued to the plexiglass, and I don't have a microscope to see if they would be touching...

Thanks.
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hartiberlin

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #190 on: April 02, 2008, 03:13:23 AM »
No,
no diode needed.
Just measure first the voltage from this additional coil
on the scope and see, which amplitude is higher,
the positive or the negative and then use the higher amplitude
for the positive side.
So in other words, just find the right polarity to pulse it through
the sparkgap onto the battery.
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amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #191 on: April 02, 2008, 03:26:11 AM »
On my SSG I have a separate tri-filar power coil wound alongside the bi-filer trigger-power and there I only get ~200V spikes which appears not sufficient for this spark-gap I made because nothing happens.

I suppose the electrodes needs to be even closer for these low voltages, or I'm not doing something right...
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hartiberlin

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #192 on: April 02, 2008, 03:34:10 AM »
Yes, 200 Volts is a bit low.
You need at least I would say 500 Volts or you need to cut
the rods into needle sharp like tips !
If you make them needle shaped at the end, there
the electric fields are much more dense and thus
the spark will jump much easier !
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amigo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #193 on: April 02, 2008, 04:49:50 AM »
I was able to squeeze 400V out with a fresh battery and get the micro spark-gap to work, sort of.

I followed Stefan's advice and sharpened the ends to a needle point and when plugged into the circuit had to push one end of the electrodes to create a momentary contact and then it would spark. Suffice to say it does not smell nice. :)

Turns out the electrodes in the micro spark-gap have to be *really* close, much closer than I thought. Also, because my wire was wrapped around the electrodes and then electrodes glued to the plexiglass with hot glue gun, it started sparking where my wire was wrapped around on one electrode. As a consequence, it was getting hotter around that area and the glue started to melt. Talk about a chain reaction, hehe.

I can see the potential in the spark gap, but we need voltages in excess of 1000V to be able to use a spark gap of nominal size and not something super miniature.

This also makes me wonder about something else, a multi-filar circuit where one coil is a start-up driver, using conventional pulse electronics to kick start the self oscillations. Post start-up set of driver coils wired via a spark gap to a large high voltage capacitor(s) to continue the process. Last set of coils would be power coils used for whatever output is deemed necessary.

Of course that post start-up driver set of coils would need to produce 1kV and above, and be tuned properly with the right capacitor(s) and the spark gap so that the oscillations continue and do not stop. Definitely out of my reach of experimentation, for the time being anyway.
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turbo

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Re: Single AA battery to light WHITE LED for long-long time
« Reply #194 on: April 02, 2008, 06:54:50 PM »
Hi

I was usually using a car ignition coil but they consume a lot of power and these type of coils can make big sparks.
So i was looking for a methode to produce high voltage with not too much input and i found some old backlight inverters used in laptops.
These you can just pulse with a signal generator to get high voltage out.
The primary is wound as two coils so it's also possible to use one for the drive and the other for the trigger in a blocking oscillator setup.
Then you can adjust the frequency just by bringing a magnet close to the core.
Another way is to pulse a coil which has many turns of fine wire and connect the signal generator in a way that only the pulse can go into the coil ,but not out of it into the signal generator.
Then you use two other diodes connected in reverse so that they only let the pulse out of the coil to collect the high voltage spike which is caused right after the Bemf due to extremly rapid collapsing of the field.
Basicly the circuits i have tested have had 5 elements.
1.a signal source.
2.a step up item.
3.wires of equal lengths and a means to guide the flow in and out of the coils and sometimes capacitors too.
4.the spark gap.
5.offcource is the output element, which mostly was NE2 bulbs but other things were used too.

M.
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