Author Topic: Joule Thief (Read 6344480 times)

dasimpson · « **Reply #13605 on:** June 02, 2010, 10:02:02 PM »

Quote from: Pirate88179 on June 02, 2010, 10:00:19 PM

Yes, exactly right as I understand it. Higher amp draw means you may need several b-caps in parallel. I just saw in another topic a fellow posted that Maxwell is selling their 3,000 Farad B-caps for like $90.00!!! That sounds like an incredible deal. That is almost 5 times the capacitance of mine.

Yes, you can dump a JT's output into a supercap. I don't rectify it as I was thinking that wastes some energy. Most JT circuits appear to output pulsed dc and not a true ac anyway. The big caps capture those spikes and make them usable.

Bill

ok on that note i will give it a go with out the bridge ill just make sure to note what lead of the secoundry is posetive

resonanceman · « **Reply #13606 on:** June 02, 2010, 10:23:25 PM »

Quote from: dasimpson on June 02, 2010, 02:13:29 PM

the problem with looping the joule thief back into itself is that thay is not enogth current comming out of the device to counter balence whats been put in plus currewnt is what charges the battery not the voltage charging with voltage only dosent charge batterys only false charges them the way i find if a battery is charged or not is to have a 3 amp meter and connect these to ethier end of the battery a no no i know but if the bettery if fully charged i find it shows the ampage of the battery aka 2500mah batterys shows on an 3amp meter will be 2.5amps correct me if i am wrong but this is what i found i tried the voltage trick but all my dead rechargable show 1.30volts thats means they are charged but you try and power anything they wont work

Dasimpson

How many rechargable batterys have you tried to charge?
How dead were they?

The ability to charge a battery using spikes is well known......
You can often recondition batterys that would be considered dead.
But sometimes dead is dead.
Often people do not understand that batterys are damaged if they are deep discharged........each type of battery has a particular level of discharge that can be tolerated ....... For a standard 12 lead acid battery the level is around 10.5V .......discharging the battery any lower may damage it.

Jeanna has a thread about charging batterys with impulses .

http://www.overunity.com/index.php?topic=8950.0

gary

dasimpson · « **Reply #13607 on:** June 02, 2010, 10:26:12 PM »

dead is when my mp3 player says no battery left normaly about 1 volt but after an houre there back to been 1.2 maybe more but they is no ampage there when i charged with joule thief i did one for a few mins another for an hours and so on ethern after a day the battery was saying charged by volts but not by ampage as they still would not power my mp3 player so that tells me they are not charging

and as i say again unless you have the batterys trickle charge comeing from your joule thief they wont charge but they can be broght back from the dead as my rc remote battery has been it would not charge run it for an hour on the joule thief i then put it in the charger and it is now fully charged and working

dasimpson · « **Reply #13608 on:** June 02, 2010, 10:32:33 PM »

as another point i used the proper charger and all batterys are charged i have 12 aa in total i tried 6 with the joule thief and 6 with the bettery charger same length of time the joule thief fails but reconditions them so no loss really i guess just pitty it wont charge them properly i now have all 12 vully charged i have just put a 2500mah aa on the input of joule thief and a 650mah aaa battery on the output i will leave this for a day see what happens if this wont run a motor then this dose not work as i have run the motor with a properly charged one

resonanceman · « **Reply #13609 on:** June 02, 2010, 11:30:33 PM »

Quote from: dasimpson on June 02, 2010, 10:32:33 PM

as another point i used the proper charger and all batterys are charged i have 12 aa in total i tried 6 with the joule thief and 6 with the bettery charger same length of time the joule thief fails but reconditions them so no loss really i guess just pitty it wont charge them properly i now have all 12 vully charged i have just put a 2500mah aa on the input of joule thief and a 650mah aaa battery on the output i will leave this for a day see what happens if this wont run a motor then this dose not work as i have run the motor with a properly charged one

Dasimpson

Your 1 day charge will not make much difference.

John Bedini says it takes something like 20 discharge/recharge cycles to condition a battery.

gary

dasimpson · « **Reply #13610 on:** June 02, 2010, 11:39:51 PM »

all i know is i had a battery that read 0.00 on my meter i tried loads of time with charger to charge it nothing put it on the joule thief reciving end for an hour it read 1.31 volts but but very mah put it in the charger for the 15 hours at 200mah and is now holding full charge better then any of the others

resonanceman · « **Reply #13611 on:** June 03, 2010, 12:18:49 AM »

Quote from: dasimpson on June 02, 2010, 11:39:51 PM

all i know is i had a battery that read 0.00 on my meter i tried loads of time with charger to charge it nothing put it on the joule thief reciving end for an hour it read 1.31 volts but but very mah put it in the charger for the 15 hours at 200mah and is now holding full charge better then any of the others

Dasimpson

That is a great example of a joule thief reconditioning a battery.

That is just a start though.

To get the most from your battery use it and recharge it with a JT .......it might not seem like the JT is charging it very well at first...... after a few cycles the JT should charge it better........I understand it takes about 20 cycles to get the most out of it.

gary

dasimpson · « **Reply #13612 on:** June 03, 2010, 12:23:56 AM »

ill give it ago

i might just take the 2 small solar panels i have run them to a aa battery then run that to the joule thief hopefully i will be able to charge other batterys also

Poit · « **Reply #13613 on:** June 03, 2010, 12:55:40 AM »

Thanks for all the replies.......... I guess I have a lot of reading to do

crowclaw · « **Reply #13614 on:** June 03, 2010, 08:15:53 AM »

Hi All,
I have done quite a lot of experimenting over the last few months with radiant charging using the back EMF from various circuits including JT's. As Gary mentioned you do have to keep cycling the cells (charge/discharge) over many times. Both pulse frequency and mark/space ratio plays a crucial part in how successful this technique is. You are correct that a dead cell can be brought back to life and show a potential voltage, but no real useful current. You need to study the works of John Bedini and others to get a grasp of using these charge methods successfully. I have achieved mixed results with both nicad and lead acid cells... the methods tend to be rather critical, and I'm still working on these projects.

dasimpson · « **Reply #13615 on:** June 03, 2010, 12:51:50 PM »

ok so to give this the real test everyone says it needs
do i wont to use a sedondory with a diode to stop bleedback from the battery like you do with a solar panel or would i put the out into a cap then diode and into a battery

dasimpson · « **Reply #13616 on:** June 03, 2010, 01:37:22 PM »

Quote from: Pirate88179 link=topic=6123.msg243314#msg243314 A=1275507518

I did that last year, check out my videos. I ran a Bedini motor from my EER or earth battery. I have been using supercaps with my EER for some time now. It is a good way to capture the high spikes and preserve them for usable power. it works really well.

Bill

my idea was to use the pulses from the joule thief instead of a read switch but i relise that maybe the joule thief pusles are to fast so i undertsnad that charging a cap befor the bedini motor might be the right way to go but to keep the spark down on the reed switch wouldent a condenser from a cars point system do this best as thats exactly there job on a car

dasimpson · « **Reply #13617 on:** June 03, 2010, 01:40:15 PM »

question the uf rating on a cap is higher the uf the higher the ampage ?

eg what one of these is higher i 470uf or the 2.7uf the resion i ask thsi also is that the 2.7 is a bigger cap in pysical size but that coul ebe cos of the higher voltage rating ?

MrMag · « **Reply #13618 on:** June 03, 2010, 04:23:08 PM »

yes, the higher the number the more capacitance.

Exactly. 470uf is higher but the 2.7 will have a higher voltage rating

dasimpson · « **Reply #13619 on:** June 03, 2010, 04:26:21 PM »

cool glad i have that much figured now for the rest lol

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