Originally posted by seth
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Joulethief SEC exciter and variants
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Originally posted by anonymussle View PostQuestion:
What's a quick and dirty way to measure millihenries on a coil? Do I need a special meter?
Mussle
Inductance Calculator
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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
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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
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Originally posted by xee2 View Post
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
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Originally posted by xee2 View Post@ 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.
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.
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Originally posted by slayer007 View PostThis 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 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
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Originally posted by xee2 View Post@ 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.
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.
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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.
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Originally posted by xee2 View PostYes, that would be 220 ohms. Much different than what I have been using. Do you have a digital meter you can use to check it with? I will start trying lower resistance values. Thanks.
I now have 3 working resistors rated at 120, 270, and 330 ohms. Which means my wife also mixed up the colours....they're just too small!!!
At the moment im charging 1AA whilst running 1AA in an emergency charger....a little endurance test and slayer replication.
I recommend trying a big toroid on top - or sphere covered in aluminium foil. I just cant get the same performance without it, especially with the FETs.
Have you tried a toroid on top of L1? Or something similar.Last edited by seth; 09-17-2010, 08:59 AM.
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