Joule Thief

[freepow]

Hello Bill,  Just an ordinary JT setup, but instead of haveing a normal toroid, I am using a 5 pin Disp-Cam transformer, then a diode on output of one end of secondary of transformer.

On my DMM I am getting around the same volts (260+) as the Disp-cam was getting with the 5 pin transformer.

But the only difference is that when charging a HV cap, it go's up very slowly, yet the same set up in the camera - charges up within 2-3 seconds.

The only difference I am using a 2n2222, I have tried a BC547 and 2n3904...
still slow charging !

Whats the difference in the disp-camera oscillator and my JT ?


Do you know of any simple JT diagram that will charge say a 300 volt cap up in 2-6 seconds like a disp-camera???


Just one other thing...   I used one camera circuit with its 330v cap and pressed the charge button, then when cap was charged, I took out the AA battery, and I connected my (20xLED bulb 240v mains powered)
to the cap, and it lit nicely, not sure how long it would light for.

[freepow]

   If I had an earth battery rated at 1 volt and charged a  3000 Farad 2.5v ultracap,  would the earth battery fill the 3000 Farad cap up full,  I know it would only charge to 1 volt, but would it fill up to its full 3000 farad capacity in amp hours, if you know what I mean

I have tried this with a  10 or 55F cap and it charged full, but would the earth battery charge the big cap up full over a daylight charge?

[nievesoliveras]

This was the circuit I was talking about. The one that charges a cap very fast.
Or at least that was the claim at that time.

Jesus

[Pirate88179]

  If I had an earth battery rated at 1 volt and charged a  3000 Farad 2.5v ultracap,  would the earth battery fill the 3000 Farad cap up full,  I know it would only charge to 1 volt, but would it fill up to its full 3000 farad capacity in amp hours, if you know what I mean

I have tried this with a  10 or 55F cap and it charged full, but would the earth battery charge the big cap up full over a daylight charge?

Good question.  I was always told that caps store energy which is a combination of volts and amps, or mA's.  My EB puts out about 1.9-2.0 volts and yet I can charge my 650F 2.7 volts cap to full capacity.  Not to muddy the waters but there is something else going on as the cap captures those high spikes we see on the scope and stores them as usable power.  I found this out a while ago and, although it may be common knowledge, I have never read of this so I keep saying it so others can try it too.

My gut tells me (without the EB involved) that if you charge a cap with 1 volt (pressure) then the cap will only have 1 volts available so I don't think that would count as "full" if it was a 2.7 volt cap.  Now maybe others here smarter than I can comment.  Maybe you would still get the full 650 farad capacity but delivered at only 1 volt?  That I do not know.

Bill

[IotaYodi]

My understanding is that standard dc current will stop flowing once a cap is filled. Ac current will charge and discharge the cap on its own. Having looked at scope shots of mine and others with an Eb,the current flow never stops completely or if it does it must be 1000th or more of a second. The time interval is what it may be and the scopes cant pick it up. This might account for so many radiant spikes. I would think the rate of current flow and voltage in from an earth battery would be the same on the output of the cap just like an ac current. Checking the output side of the cap,once filled, using an Eb may give some answers. Taking in the load factor of the meter also.