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Title: Re: RE-EMF ChargerPost by: rfnreynders on May 15, 2013, 01:55:47 PM Hi there,Sorry for not having been around or some time, but moving takes up loads of time !So what's up....Built another one of my chargers.Put a 100 ohm resistor in series with a 1K ohm potmeter on the base.Use the 2N3055 !!Twisted the wires on the bifilar coil. This seems to work good !used a transformer like previously mentioned of 20 V DC as source,This is perfect for charging 1 , 12 Volt battery.Also made connections for a 240 watt, 36 volt 8 amps solar panel.Use same configuration, but charge 2 , 12 volt battery's in series.Same principle.The battery's where 82 A/H and a 94 A/H battery that were completely dead. Unreacharchable by normal chargers.Put both battery's on the RE-EMF charger for several days, keeping the current down with the pot meter, just de-sulphating.Got both battery´s up and over 12 Volt.Then i rinsed them both out with deminerelised water.Then i made an Alum solution (bedini cristal battery) On 1 liter water i used 200 grams of alum. (aluminium sulphate).Put the solution in the battery's and recharged the battery's several times.Now both battery's are very strong and hold power unbelievable.Going to build a whole bank of these Alum battery's to run through an inverter and power my house.. of grid. super cheap !The RE-EMF charger can charge 2 of these big battery's in series on one solar cell with ease.And !!! you can build several RE-EMF chargers to be used on 1 solar panel. Each charger on 2 battery's in series.Use a big capacitor on the solar panel to use as a buffer.-----

Now for some questions i read in your comments.Transistor getting hot..You're pulling a lot of amps. Try to use the pot meter and see on your meter how fast the battery charges. Working of RE-EMF charger explaned:If you use 20 volt input.And a 12 volt battery that is at 6 volts to begin with.Battery uses 6 volt of the 20, so 14 volt left on the coil.The base of the transistor needs 0.6 volt to switch.So 14- 0.6 = 13.4 volt needs to be dissipated in the resistors on the base.Calculate with the 2N3055 :It has an amplification factor of about 50/60So if you want to push a max amp of say. 1 amp:1 amp / 50 = 0.02 amps or 20 milli amps on the base.So 13.4 volt / 0.02 amps = 670 ohm needs to be your resistor value on the base.Then the voltage of the battery rises to say 12 volt.What happens:The battery takes 12 volt of your 20 volt source.Which leaves 8 volt on your bifilar coil.8 volt - 0.6 base voltage - 7.4 volt to be dissipated by the base resistor.This resistor was set at 670 ohm.

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So the amps on the base is: 0.011044776 amps * amplification of the transistor (50) = 0.5522388So when the battery reaches 12 volt your not charging at 1 amp, but at 0.5522388 amp.Using the pot meter you can lower your resistance on the base and increase the charge current again if you please.I hope it all makes sence to you and i hope you enjoy !

regards,Rene

Post by: Wistiti on May 18, 2013, 07:08:07 PM

Hy Rene!thank you realy much for this great charger, il est vraiment efficace! ;)Do you try to update the charger with the last (joule theif improvement) shown in the last pjk book update?The thing is to put series of led on the base of the transistor.... it realy improve the amp on the output!!!Thank's for the alum battery hint! I will give it a try!

Amitié

Post by: br0ns0n77 on May 20, 2013, 02:29:28 PM I have an 18v cordless drill charger that actually outputs around 20v but the amp output is only like 200ma, but I guess that'll work - it will just be slower.Attached are some pics of my circuit mounted on a wood platform using screws as connector posts. This thing is charging two 6v golf cart batteries in series fairly fast at 200ma. My regular car charger couldn't bring the charge in those batteries up at all.Another thing I noticed is if I have a couple of neodymium magnets around the toroid when it's charging a battery, I can feel the electromagnetic field vibrating my fingers the closer I get to the toroid. Another strange occurrence happened - I have a CB radio attached to another set of batteries completely separate from this circuit and when I keyed down the mic to send out broadcast, the voltage on my RE-EMF circuit went waaaay down. It's almost like the CB radio was drawing power from it wirelessly. Weird!

Post by: rfnreynders on May 23, 2013, 11:43:46 AM A 60 volt input should do it. Upscale your diodes and perhaps put some 2N3055 parallel to pump more amps. Definitively use thicker wire and a big toroid as you need to buffer the pulses into the coil/toroid. You could use home electric wire. Thick enough and suitable for 16 amps i think.

Rene..

Quote from: mad659 on February 14, 2013, 02:57:57 AMIt looks like a good circuit. I'm sure it works fine. Any idea on how to upscale it to charge something like a 765ah 48v forklift battery. I assume a larger coil and probably a 60 volt input? I've had success with the Bedini type charger on a smaller scale but yours looks simpler with a lot less parts involved. I would gladly try any suggested circuit on this big battery and post my findings here.

Post by: rfnreynders on May 23, 2013, 11:47:09 AM Quote from: br0ns0n77 on May 18, 2013, 08:40:15 PMMy question is where to find a 20v charger? I've only seen 6, 12, 24 models.

find a 12 volt ac transformer and rectify that with bridge diode rectifier. Then you have about 20 volt DC.good luck !

Rene

Post by: rfnreynders on May 23, 2013, 11:52:56 AM Quote from: Wistiti on May 22, 2013, 07:02:43 AM

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Then i made an Alum solution (bedini cristal battery) On 1 liter water i used 200 grams of alum. (aluminium sulphate).Put the solution in the battery's and recharged the battery's several times

Hi rene and all!Can you elaborate a bit on how to made these type of transformation on these battery... Or refer me to where i can find a kind of "DIY"information...Thank to every one how can help me!  :)Hmm looked for some footage. Maybe this helps.. grtz,Rene

Post by: rfnreynders on May 23, 2013, 12:02:57 PM Update !Got both "dead" lead acid battery's up to over 15 volt charging.So i will soon convert them to alum battery's.Also.Got a kit with a cordless drill from my neighbour.The charger was broken. (Damn switching power supply crap)So. He wasn't able to charge the battery's anymore and so had no use for the dril.He knows i build some strange stuff and asked if i wanted the kit. Sure i did...Ripped apart the complete charger, cut out most of the circuit board.Left the contact terminals for the battery inside the charger intact.Then i made the circuit with a 20 volt power supply.1 k resistor on the base. 1 Diode and re-used the red LED as the second diode, so that if the system worked i could see it with the diode lighting up.Also you can hear the sharp pitch most of you probably have heard.The battery's should be 12 volt but only where about 7. They ar NI-CD batteryś.After the rebuild was done, i charged both battery's in about 2 hours (just left them in there each for an hour)

I build a complete fence and used this dril to screw in the screws.I build the whole fence on 1 battery charge.. whoehaahahaa aint that cool.

I just meusured the battery's and they are both 13.70 volts. Me like !!!

It is an Hitachi DS12V something...

thank you neighbour !!!

So if you have a cordless dril... and the charger is broken or kills your battery's like crazy. You know what to do !

Rene Title: Re: RE-EMF ChargerPost by: rfnreynders on May 23, 2013, 12:10:48 PM Quote from: Wistiti on May 18, 2013, 07:08:07 PMHy Rene!thank you realy much for this great charger, il est vraiment efficace! ;)

Do you try to update the charger with the last (joule theif improvement) shown in the last pjk book update?The thing is to put series of led on the base of the transistor.... it realy improve the amp on the output!!!

Thank's for the alum battery hint! I will give it a try! Amitié

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Not quite sure what you mean by putting LED on the base in series?Have you got a schematic ?

I do know some put a diode over the base and the emittor to make the transistor shut of even faster, what makes the collapsing field even stronger. Hence a bigger back-spike.

Rene

Post by: Wistiti on May 24, 2013, 08:28:50 AM Sure!Here is the circuit.... ;)

I just change the value of the pot to 2k and add 2 blue led in series to the base of the transistor.This way it seem to improve the cop of the circuit... But i cant no do full test cause i do not have an oscilloscope... :(Enjoy!

Post by: rfnreynders on May 28, 2013, 02:32:10 PM @LaserSaber

Have you tried this charger on the sol in 1 device to charge battery's yet?

Curious about those results.

I revived 2 lead acid battery's that where dead the other day.

Put one back in a friends car and the garage said. This battery is in prefect condition ! whahahaha.The same garage the battery came from, fro free !!!    :-)

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