Pictures worth a thousand words.....quad coil build and setup to charge L-16 batterys

[Nanuhi]

James,
If you you carefully read datasheet (there a a few of it and they slightly differ) you will see the usage of 5V power. It is exactly the way I did and mentioned above. And of course, I know about the 130 Hz minimum frequency as well as that this chip could work at as low F as 1 Hz.

I asked practical question. If you do not have a practical answer (except for buying DVD, that I would buy I think)... Sorry, but I know technical background. The question was to Volty, who quoted Bedini's word. So, I asked him (or someone else) a possible explanation from him. Not a theory from datasheets from you.

[James McDonald]

James,
If you you carefully read datasheet (there a a few of it and they slightly differ) you will see the usage of 5V power. It is exactly the way I did and mentioned above. And of course, I know about the 130 Hz minimum frequency as well as that this chip could work at as low F as 1 Hz.

I asked practical question. If you do not have a practical answer (except for buying DVD, that I would buy I think)... Sorry, but I know technical background. The question was to Volty, who quoted Bedini's word. So, I asked him (or someone else) a possible explanation from him. Not a theory from datasheets from you.

Hi Nanuhi --

Sorry for trying to help out but I did see in one data sheet where they tied pin 15 to pin 16. I am not sure how backdriving the build in voltage
regulator with a 5 volt input can be good for the chip. Pin 15 of the chip is the VREF output which is 5 volts. Almost all regulators except LDO types
require an input voltage of 3 volts above the built in VREF regulator. This means minimum VCC operating voltage is 8 volts.

-- James

[Nanuhi]

James,
It is simple. Internal regulator supplies all the internal logic and OpAmps as well as has its output on pin 16. When we shortcut pins 15 and 16 we bypass internal regulator but must supply all the internal chips by 5V. No needs the these 3V above 5V because now all is "eating" these 5V (including output stage). But after pins 15 and 16 are shortcut, we must not exceed the voltage of internal logic. So we drive the whole chip by 5V. This way sg3524 works more stable but has the restriction of output voltage.

[RS_]

In my experience, some brands of the SG2534 just do not work at all, at really low frequencies, some don't work at low voltage's, they tend to vary vastly with different spec's, depending on the brand, and when it was made..... makes it very hard to use, unless you have the correct data sheet for the brand and year model.

these days, a basic stamp, or a arduino will do a better job, with a few lines of code, that can be precisely adjusted to any PWM time based value.........

then there is the Bedini op amp comparator circuit, that will do the switching based on the capture cap voltage, and works much better than a time based switching solution, as it is adaptable to what ever input is coming in at any given time, where the time based method is not adaptable to this change.......

[Nanuhi]

In my experience, some brands of the SG2534 just do not work at all, at really low frequencies, some don't work at low voltage's...

I have an idea. As soon as I test it, I could report the results.

then there is the Bedini op amp comparator circuit, that will do the switching based on the capture cap voltage, and works much better than a time based switching solution, as it is adaptable to what ever input is coming in at any given time, where the time based method is not adaptable to this change.......

Very interesting to look at it. Though, this approach involves another problem. Cap would be filled just fine but discharge phase should be undependable from charging phase because battery needs different pulse timing.

[RS_]

not really a problem, as the discharge pulse time on, can be tuned as well by increasing the cap size on the voltage divider network......

[Nanuhi]

This schematics seems to work stable even at the frequencies below 1Hz.
4M7 pot is too large, needs at least twice as small (I just have this one at the moment).

[Faraday88]

Hi all,
Here is a picture to get your attention!
http://i1243.photobucket.com/albums/...n/8f9f531f.jpg


Thought I would link some photos of a coil I wound today. Labor day morning…took me around 1 hour. It took longer to take the pictures than it did to do the work. It is a four lead power coil using #18 cu wire and #19 cu trigger. The four leads were laid out, twisted, and then wound onto the same spool we use for the ssg. The electronics were already packaged on a previous coil construction experiment using #18 aluminum wires. Many pictures are attached so you nubies can get a feel for the work involved and construction methods used. Thanks to Marcia Stockton for the twisting idea and lawn chairs!

http://i1243.photobucket.com/albums/...n/abf47532.jpg
http://i1243.photobucket.com/albums/...n/06296c70.jpg
http://i1243.photobucket.com/albums/...n/f4ddfdec.jpg
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http://i1243.photobucket.com/albums/...n/f6dbfb86.jpg
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http://i1243.photobucket.com/albums/...n/d4415c0d.jpg
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http://i1243.photobucket.com/albums/...n/1681fd56.jpg
http://i1243.photobucket.com/albums/...n/875875f0.jpg

I also had previously wound a 7 lead coil #26 and #30 trigger for an experiment. It worked OK but I was after something much more powerful. I replaced this coil with a 7 lead winding and transplanted it into an existing electronics package I had from before. It too was wound using #18 cu and #19 trigger. 8 leads total! When I first fired this coil up it did not work as planned. Not all of the transistors fired at the same time because none of the electronics were matched. I later found out that it worked Ok @19 volts input. All 7 showed firing with the scope during charging. Note the spool size difference….I knew it would not fit the ssg spool so used a speaker wire spool I had laying around. It has a 1” dia core!

http://i1243.photobucket.com/albums/...n/c59b04ae.jpg
http://i1243.photobucket.com/albums/...n/fd169a52.jpg



Some of the specs from the entire unit running with all three coils is as follows: 19 volts @ 6.7 amp from a 20 volt power supply....Center coil on the ssg is #26 power and #30 trigger just like the previous forum specs and outputs .6 amp @ 19 volts......quad filar coil is #18 power and #19 trigger - outputs 1.8 amp @ 19 volts input......The 7 lead coil is #18 power and #19 trigger - outputs 3 amp. The total output of the system is 5.4 amps. Wheel speed is 197 RPM. Here are some pics of the whole assembly running.

http://i1243.photobucket.com/albums/...n/fd169a52.jpg
http://i1243.photobucket.com/albums/...n/380d87fd.jpg
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http://i1243.photobucket.com/albums/...n/e1ba6555.jpg
http://i1243.photobucket.com/albums/...n/6182852e.jpg



Lets me say that this is the same bike wheel I started with....just a little modified on the magnet spacing. Also none of the electronic componenets are matched! I did this just to see what would happen. At 19 volts the scope showed that all the transistors were firing though. This very crude assembly is charging these monster batteries no problem. This is the breakthrough I have been looking for since joining this forum. I just needed to know what the limitations are. There are none…. Just your imagination! Next stop one hell of a big generator. Just need to do the engineering drawings and construction. Oh I won’t forget the electronics matching!


Pic of my night light! I remember using the alum for chancre sores when I was little.

http://i1243.photobucket.com/albums/...n/7461dbd0.jpg


I hope these pictures help you guys out a little. I joined this group last year during the Christmas season. The biggest education I have is from all the dvd’s from John and Tom. Without them all this stuff on the forums does not mean much to me. In my opinion the dvd’s are pricesless! Also one of the best working educations is from the 50+ runs I did to prove to myself that COP>1 is achievable using that tiny SSG coil we all start with. I did one hell of a lot of practicing and experimenting using different stuff john talks about on those dvd’s….paying attention to what is said and not said. John is not going to give you anything….you must earn it. While I was at the conference I was sitting with one of John’s employees having a beer and she was complaining about how john would make her do things she did not want to do. I told her as a boss I would have done the same thing. If John does the work for you…..you will never get it….but if you stumble upon it the hard way then it is burn into your memory for all time. This is how you learn for real……by the failures! Not the successes. Read, listen, understand…..and god sakes do something!

Bud

Hi Bud,
Just had some time to go through your pics.....Great hard work pal! wonder how is the Battery performance....!
Rgds,
Faraday88.