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Author Topic: cop > 1  (Read 39194 times)

Inquorate

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Re: cop > 1
« Reply #15 on: May 11, 2010, 10:44:35 AM »
having trouble with this site on my mobile phone, best luck so far with opera mini 4.

@Gyula - I've tried caps but the tension in them tries to equalize instantly and transistors and optos etc kept dying.

I think if you don't see OU it will be because of capacitor losses. I'd be interested to see the difference in joules in the 'charge' cap with simple pulse and with a pulsed coil and recovery diode.

Unfortunately I'm swamped at the moment, I have a one month old boy and it'll be a while before I get back in the lab.

baroutologos

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Re: cop > 1
« Reply #16 on: May 11, 2010, 11:00:21 AM »
If you take a look at the links i posted, you will see that the answer to both your questions is yes.

Thanks for your interest.

Ok, I am always in the mood for an experiment. ;)  I will post results and we discuss findings.

salutes,

ps: congratualtions for your newborn child, young father :)

Inquorate

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Re: cop > 1
« Reply #17 on: May 11, 2010, 11:02:19 AM »
Ok, I am always in the mood for an experiment. ;)  I will post results and we discuss findings.

salutes,

good luck, i'll try to be on hand with any questions you may have.

Inquorate

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Re: cop > 1
« Reply #18 on: May 11, 2010, 11:24:16 AM »
@All,

I have measured the COP by charging a super capacitor.
Still a long way to go to reach COP>1 in my circuit.

Groundloop.

have you tried supercaps with the circuit i posted?

Groundloop

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Re: cop > 1
« Reply #19 on: May 11, 2010, 11:29:08 AM »
@Inquorate,

No, but I will try it. Did you use a 555 circuit to pulse the transistor?
Do you have information on pulse frequency and duty cycle?

Is the attached circuit the one you did use?

Groundloop.

Inquorate

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Re: cop > 1
« Reply #20 on: May 11, 2010, 12:00:31 PM »
here's the 555 and opto circuit i used;

youtube.com/watch?&gl=AU&warned=True&client=mv-google&hl=en-GB&v=txJaQPHfKqA&nomobile=1

Pulse width is separately controlled to the off time. That way, the pulse width can be chosen to get the inductor to max magnetic field and no longer, then the pulse is cut and the spike harvested.

The off time can be extended or shortened; not enough 'off' time, and the charge battery will boil. Too much off time and the ions in the charge battery will come to rest before the next pulse, and we lose gain.

One second of pulses and rest and another second of pulses and rest etc may also work well, getting the best of the battery's ions' inertia, as well as avoiding damage to the battery by cutting off before things start to boil.

I want to do these tests but cannot just now as I have a month old infant who's taking up my time atm. But I'll try to help.

Groundloop

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Re: cop > 1
« Reply #21 on: May 11, 2010, 12:11:18 PM »
@Inquorate,

Thanks for taking time to answer my posts. Congratulations with your newborn.
I did check the youtube video and, yes, the circuit uses a H11D1 opto and a 180 Ohm resistor.
I will soon build the 555 and opto circuit and give it a try.

Thanks,
Groundloop.

Inquorate

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Re: cop > 1
« Reply #22 on: May 11, 2010, 12:49:32 PM »
thannks for posting the image groundloop, i should mention for others that the pin 6 and pin 2 are connected, hence the dots. I forgot to include that line when i drew it the first time.

Groundloop

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Re: cop > 1
« Reply #23 on: May 11, 2010, 01:01:53 PM »
@Inquorate,

I'm making a cleaned up version of your drawing.

What are the value of the two potmeters?
Also, what is the value of the capacitor at the 555 IC pin 2?

Groundloop.

Inquorate

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Re: cop > 1
« Reply #24 on: May 11, 2010, 01:35:33 PM »
@Inquorate,

I'm making a cleaned up version of your drawing.

What are the value of the two potmeters?
Also, what is the value of the capacitor at the 555 IC pin 2?

Groundloop.

from memory, the duty cycle pot was 5k, the 'off time' pot was 10k, and the cap was 0.1uF? I'll confirm for you tomorrow but if i go into the lab again tonight i'll be a single parent or a eunich or something..

Groundloop

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Re: cop > 1
« Reply #25 on: May 11, 2010, 01:43:16 PM »
@Inquorate,

Take your time. :-)

I will solder the 555 circuit tomorrow and post the cleaned up drawing then.

Groundloop.

Inquorate

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Re: cop > 1
« Reply #26 on: May 12, 2010, 10:39:58 AM »
the capacitor is 0.22uF, the duty cycle pot between pins 7 and 8 is 5k, I had it set on 2.2k. The off time pot is 20k, I had it on 16k, to avoid boiling the charge battery.

I had it like this .  .  .  .  .  .  .
But it could also be like this ....    ....    ....
To avoid boiling as well, but a computer controlled pic chip would be better to investigate that.

Groundloop

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Re: cop > 1
« Reply #27 on: May 12, 2010, 01:25:40 PM »
@Inquorate,

Thank you for the information.
Attached is a cleaned up version of your circuit
and also the switch circuit.

Will be testing soon.

Groundloop.
« Last Edit: May 12, 2010, 07:46:00 PM by Groundloop »

guruji

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Re: cop > 1
« Reply #28 on: May 12, 2010, 08:27:05 PM »
Hi guys any help please? I've biuld a bedini circuit but the thing is that the coil is only hissing no oscillations is happening. Someone had told me to lessen the resistance on the base but it's zero resistance on the pot.
Should I lessen the coil than?
Thanks

Groundloop

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Re: cop > 1
« Reply #29 on: May 12, 2010, 09:01:09 PM »
@guruji,

Post a circuit drawing of your setup and we will find a solution.

Groundloop.