Joulethief SEC exciter and variants

[lamare]

Combining Slayer and Puharich

Hi all,

I dug up the schematics of Puharichs modulator:

As you can see, his oscillator is virtually the same as Slayers. He used this in his WFC, see his block diagram:

So, what he did is keep his load (WFC + coils) in resonance by feeding the signal over the "resonance sensing resistor" back into his modulator. This way, the load always maintains resonance. This principle can be used to drive two identical TF in series across an AV plug:

Article:Free Electric Energy in Theory and Practice - PESWiki

As can be seen in Puharichs modulator schematic, his oscillator is virtually the same as Slayers. So, it should be a piece of cake to use Puharichs modulator schematic in combination with Slayers oscillator. So, then we have an exciter that produces a carrier wave in the MHz, which can be modulated. As can be seen in Puharichs block diagram, you can use this modulator to get a load into resonance at its own resonance frequency, which is independent of the carrier wave frequency. All we need for that is a feedback signal. This can be had easily using a "resonance sensing resistor" as done by Puharich, but I think these can also be 2 sets of diodes, so you only loose 0.6 V across your sensor. So this signal has to be fed into to modulator, with the right phase. I have drawn an opamp for amplification, but of course this can also be a simple transistor amplifier circuit. Puharichs schematic suggests it already has the right phase, but it may be necessary to correct for that, also depending on your amplification circuitry. So, some more details have to be filled in, but as far as I can tell, this should work in principle.

I hope to have some time the coming weeks to actually try this, but of course you are all free to try and beat me to it!

[seth]

@ Seth

Neither of those FETs is available locally. I will try to get an IRF830 tomorrow. That has a 1.5 ohm on resistance. I would still like to know what resistor value you are using.

OK - the wife has looked at it as im colour blind and have big problems with resistor colours.

Red red brown gold = 220 ohm resistor, right? Ive tried a selection of other resistors and this one seems to be the best....ill do some more tests today.

[anonymussle]

This video is for the people that don't have the cell phone chargers.

You can use two or more batteries in series charging two or more batteries in parallel.

Here is the video.

YouTube - continuous run and charge 2

I've been doing a lot of experiments with the SEC using two or three AAs. I've been too busy to do much lately but I'm curious to know if one could use the components from a disposable camera circuit to power a sec.

I've run into an interesting video by Chilliqueen here:
YouTube - RLC Resonant Circuit - with Disposable Camera Parts

It outputs 250volts DC from one AA but I'd like to tweak the circuit to put out less volts and more amps. Perhaps something similar to how a cell phone charger works.

I know lidmotor has messed around with camera circuits but I've never seen him try to power a SEC from it.

It's just an idea and I was curious about any thoughts on it.

Mussle

[SeaMonkey]

@ Seth

Neither of those FETs is available locally. I will try to get an IRF830 tomorrow. That has a 1.5 ohm on resistance. I would still like to know what resistor value you are using.

The "ON Resistance" of the high voltage
MosFets will be quite high. For the lowest
possible "ON Resistance" use a MosFet with
a lower voltage rating.

The IRF540 (or IRF530) is a type of MosFet
which was/is manufactured by the millions
and is quite inexpensive. It's rated at
100 Volts and 40 Amperes (30 Amperes)
and has a very low "on" resistance. It should
produce even better performance with a low
voltage circuit.

Other MosFet types which are designed for
even lower voltages would work even better
because of their even lower "on" resistance.

Some of you should see some very spectacular
results with MosFet switching.

[xee2]

@ Seth

Neither of those FETs is available locally. I will try to get an IRF830 tomorrow. That has a 1.5 ohm on resistance. I would still like to know what resistor value you are using.

[seth]

@ Seth & Jiffycoil

I was able to confirm Seth's discovery that a FET will work in the Slayer exciter circuit. This is my first success. It will not work with just the AA battery. It does not have great performance, but it does work.

Thanks - im glad someone can confirm it

I definitely get better output and lower input with my IRF 730 and IRF 630, on low volts. Can you get your hands on one of these and try it?? My initial reaction to these trannies is that the IRF 730 is better

[xee2]

@ Seth & Jiffycoil

I was able to confirm Seth's discovery that a FET will work in the Slayer exciter circuit. This is my first success. It will not work with just the AA battery. It does not have great performance, but it does work.

[slayer007]

This video is for the people that don't have the cell phone chargers.

You can use two or more batteries in series charging two or more batteries in parallel.

Here is the video.

YouTube - continuous run and charge 2

[sniky]

Bipolar switch SEC

Hi I used the HALF bipolar switch using NPN 2n2222 and PNP 2N3904(22a,470Ohm) and Slayer exiter

and it worked it still have the SEC field around the coil,
my problem is that I don't have a multimeter anymore ...(to much voltage in ) so I couldn't measure AMP draw
Can someone with a good meter make this and see if the amp draw is less or more than the simple circuit?

I used 4.2V in, didn't works with 2.4V

thanks

[xee2]

Question:

What's a quick and dirty way to measure millihenries on a coil? Do I need a special meter?

Mussle

You need a special meter to measure it, but it can be calculated from the coil dimensions using this link.

Inductance Calculator

[Jiffycoil]

I hate to tell you but you can't measure inductance without an LCR meter. Well you could put the equipment to do that costs more than the LCR meter.

[anonymussle]

Question:

What's a quick and dirty way to measure millihenries on a coil? Do I need a special meter?

Mussle

[xee2]

2 new pieces of info....

IRF 630 (which was also in my old monitor) WORKS!!!!

I dont know why but to get my CFLs to light i often have to shove a neon under the toroid, and that has the effect of igniting the CFLs immediately. 2 CFLs fully bright...18 and 14W...1AA at 0.2A (with battery charger)

Makes me think my other transistor must me an IRF 730.....nonetheless, 2 FETS are woking, so FETs work. They seem to have the same performance as each other.....much better than my TIP 31C.

Secondly, my circuit continues to work (although at about half the output and input) when i disconnect the resistor and base of the transistor from the rest of the circuit. I can still light CFL but the amp draw halves. Anyone else noticed that their circuit will still work (though only sometimes for me...trying to work out why...) when they disconnect the base/resistor line?? Any ideas why this is?


@slayer - thanks for the info. it all sounds too easy!!!! good luck with your further test

Great news. Thanks. Removing resistor after circuit starts was common when the circuit was first posted. Not much has been mentioned lately about it. I just leave mine connected. What value resistor are you using?

[seth]

2 new pieces of info....

IRF 630 (which was also in my old monitor) WORKS!!!!

I dont know why but to get my CFLs to light i often have to shove a neon under the toroid, and that has the effect of igniting the CFLs immediately. 2 CFLs fully bright...18 and 14W...1AA at 0.2A (with battery charger)

Makes me think my other transistor must me an IRF 730.....nonetheless, 2 FETS are woking, so FETs work. They seem to have the same performance as each other.....much better than my TIP 31C.

Secondly, my circuit continues to work (although at about half the output and input) when i disconnect the resistor and base of the transistor from the rest of the circuit. I can still light CFL but the amp draw halves. Anyone else noticed that their circuit will still work (though only sometimes for me...trying to work out why...) when they disconnect the base/resistor line?? Any ideas why this is?


@slayer - thanks for the info. it all sounds too easy!!!! good luck with your further test

[Jiffycoil]

Well done to all of you.