Bedini Schoolgirl

[Itsu]

magnetic boost

Ok Guys, i made a video of my newly setup battery (fixed source and charge battery) in response of the remarks of "Bill H" in post 322.

By re-tuning the magnet/coil distance together with a max. charge-current sweetspot i am now able to charge the charging battery "over" 13 volts which i could not do before.

The trick was to not tune for max rpm. and 1 puls/magnet, but rather to tune for max. charging current (at the expense of 2 pulses/magnet, lower RPM and higher input current :-( )
Another trick was to "boost" the coil by placing a southpole oriented magnet on the back of the core (desaturating this core?)

Anyway, i can now load the charging battery much more effectively then before.

Video can be found here: YouTube - Bedini 4.avi

Regards Itsu

[dR-Green]

I just found a Fluke 96B ScopeMeter up the attic How does one go about connecting this up to see the pulses coming out of the SSG?

[Farmhand]

Hi dR-Green, Nice find on the scope meter, I wish i could find one of those.

Not sure how to work one of those, but to see the "h" wave you need to connect the scope ground to the "emitter', and the scope probe to the transistor collector or the anode of the output diode.

Just incase you don't have a manual for that meter, which you probably do. But anyway here's a link if you don't.

http://assets.fluke.com/manuals/scopemtbumeng0400.pdf

Just make sure you have the scope set correctly. before you connect it, you don't want to damage that.

Cheers

[dR-Green]

Thanks Farmhand, it's where to connect the probes I was wondering. I have no idea how to use this scope, or any scope for that matter, so maybe I'll wait until my dad is available to try that out. As long as I know what I'm supposed to be connecting where... But he seems to think I should be ok just experimenting with it and I'm unlikely to damage it? I think I'll wait until he's about tomorrow though just to be on the safe side.

Yes I have the manual, it's practically brand new in the box. Good thing my dad doesn't like digital scopes Thanks for the link anyway

[eastcoasttinker]

About batteries

Hi, all. This is my first post. my question is about batteries. I'm not sure if there is a thread for this or not. If so I wasn't able to find it yet. Any way I have a working ssg and have be running some test on batteries, but would like to know what kind of cells other users are working with. I mean others types besides lead acid. I've been working with AA ni-cads and NIMH mostly. I haven't done much with lithium, li-ion, mercury and the like. Alkaline seem to be a dud. In short I've got some test results to post if anyone would like to see them, and I would like to compare my findings with others. Looking forward to a responce.

Eastcoasttinker

[blackchisel97]

Hi, all. This is my first post. my question is about batteries. I'm not sure if there is a thread for this or not. If so I wasn't able to find it yet. Any way I have a working ssg and have be running some test on batteries, but would like to know what kind of cells other users are working with. I mean others types besides lead acid. I've been working with AA ni-cads and NIMH mostly. I haven't done much with lithium, li-ion, mercury and the like. Alkaline seem to be a dud. In short I've got some test results to post if anyone would like to see them, and I would like to compare my findings with others. Looking forward to a responce.

Eastcoasttinker

@Eastcoasttinker to the forum.
I tried NiKad and Ni/Metal Hybride's. Lithium are a bit different and I found that some have protection built in which will not allow to charge with spike. My main focus was on flooded lead acid, even small, motorcycle or garden tractor type. They seem to work best with those systems, simple or advanced. Alkaline cell can be recharged but with caution and only few times. They aren't design for such and will die. I still use one transistor SSG for recharging small batteries since my other setups are too powerful.



Vtech

[Joit]

Hi Eastcoast and from me too.

I found, i can charge close anything, even Buttion Cells, except Lithium-Ion Akkus. They seems have an other Cycle to charge them, but i did not have a lot from them right now, to play around with it.
Some Alkaline did pop for me too, but mainly it works, when i reduce the Duty cycle very much.
Alkaline do need therefor more time to charge them with a lower ammount of Current.
For the Button Cells, i used very very low Current, i stopped my SG and did let it osscilate at 1,4V and less then 10mA. Therefor it charged them up and a Clock now runs since over 2 Weeks with it.
The first attempt i did with a Button Cell was, that i charged it with to much Power,
and it did not take much time, that it was hot and destroyed.
For any other Devices, i take the Batteries away from the rest of the Circuit, and only charge them alone,
else it may damage the Rest from any Circuits.

But there are still a lot of Batteries around, where still the Quality of the Material is very poor.
It doesnt mean, that it cant be charged, when it is a certain Combination,
but i need to try allways first, with how much Power i can charge them.

[eastcoasttinker]

Thanks for the responses. Wasn't sure this threat had much activity. Glad to see it does.
Blackchisel97, I've heard lithium polomers have circuity that prevent radaint charging, but I'm not sure if that includes li-ion like cell phone batt. Any thoughts?

Joit, I've also tried to charge button cells, but they blew up on me. I thought I might have gotten the polarity mixed up, but either way they both poped. I'll try your suggestion. Hope it works.

I'm going to go over my notes and post the tests I've done. Hope its useful.

[eastcoasttinker]

[Joit]

Hi.
Ty for your nice Report.

Err, a little Mistake at my Button Cells. The Power to charge them was even under 1mA at ~1,6V at my Powersource.
My crude Test there was to still have a finger on them to see if they do heat up in any Way.

[sucahyo]

I don't reduce my charger output when charging button cell. I only limit the time. It do heat up. But it able to power mother board clock for some time.

The hardest to charge is 9V zinc carbon. D-size zinc carbon can hold charge for few days.

[eastcoasttinker]

button cells

Thanks sucahyo for the info. About how long did you let it charge and are you able to recharge them?

[eastcoasttinker]

[sucahyo]

Thanks sucahyo for the info. About how long did you let it charge and are you able to recharge them?

5 minutes for button cell and until heated up for D-Size battery. I think button cell is rechargeable until it dry.

I never buy D-size battery anymore. I charge once a week.

[bclinton]

Question about bedini circuit???

I have built my circuit according to the diagram provided but my magnet works direction is north as well as my magnets but will not spin for long when I turn it. I built it on a bike wheel. my question is what possibilities could stop it from turning? I have a 22 and 24 gauge wire with about 100 turns and it heats up very hot.