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slayer007
Starting Member
USA
17 Posts |
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JustAnElectrician
Advanced Member
USA
257 Posts |
Posted - 21/01/2009 : 4:23:50 PM
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THAT is cool. Looks like a solid state Imhotep Radiant oscillator, kinda.
Got any info on a solid state oscillator (pulser) circuit? I am wanting
to set up a DC pulse circuit, 6-12 volts, low current.
TIA!
-Rob
...just an Electrician! Since 1985... |
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slayer007
Starting Member
USA
17 Posts |
 Posted - 22/01/2009 : 07:58:34 AM
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Thanks JustAnElectrician
Its just a basic joule thief circuit redone with a big coil.
You can find a circuit for it at (forum promotion not allowed)under big joule thief or at UO.com under the joule thief thread on page 141. |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 24/01/2009 : 06:15:07 AM
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i just made a small one using an old cd/radio/tapedeck parts and it worked first time. this is the first circuit ive done that worked straight away so im feeling smug at the mo 
now the serious bit:
presumeably this pulses the LED from the transistor, if so do you think a tiny thief could be used instead of a trigger coil on an ssg to trigger another transistor like a darlington pair or is it too inefficient
heres my pics
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Edited by - rgbargee on 24/01/2009 07:42:39 AM |
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slayer007
Starting Member
USA
17 Posts |
Posted - 24/01/2009 : 08:19:09 AM
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You can hook more coils or transformers to the JT's transistor.
Here I added a transformer to a small JT you can allso do the same with the big one.
You attach the positive side of the coil to the positive source then negative side of coil to the collector of the transistor.
http://www.youtube.com/watch?v=KkAlPWw3DKI&feature=channel_page |
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slayer007
Starting Member
USA
17 Posts |
Posted - 24/01/2009 : 08:23:46 AM
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@ rgbargee
I think you could.
I'm going to to try one with a pnp transistor then send that to the base of my npn transistor running a BIG coil. |
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JustAnElectrician
Advanced Member
USA
257 Posts |
Posted - 26/01/2009 : 12:09:31 AM
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quote:
Originally posted by slayer007
@ rgbargee
I think you could.
I'm going to to try one with a pnp transistor then send that to the base of my npn transistor running a BIG coil.
Basically an Inverse Darlington Pair???
Sounds like it would work, keep posting results here, man!
...just an Electrician! Since 1985... |
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slayer007
Starting Member
USA
17 Posts |
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JustAnElectrician
Advanced Member
USA
257 Posts |
Posted - 29/01/2009 : 2:43:51 PM
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
That one must have a step up winding, I have been wondering how that would work.
Higher charge voltage (conventional) output, ((lower Amps)) and sharp gradient would still pull-in the Radiant.
Thoughts, Slayer007???
...just an Electrician! Since 1985... |
Edited by - JustAnElectrician on 29/01/2009 3:04:42 PM |
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slayer007
Starting Member
USA
17 Posts |
Posted - 30/01/2009 : 06:18:27 AM
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The second winding is about four times bigger than the primary coil.
It's allso a biger guage wire 20 or 21 and the JT is a 23 guage.
I had to use the analog meter to read the power off the secondary coil.
The digital meter would just go nuts I couldnt get a reading off it.
I'm thinking the digital meter was reading some of the HV spike from the second coil.
I let it go for about an hour longer to see how high the batterys would get.
They went up to about 13.22 the source battery went down to 1.26 from 1.28.
Then after sitting for two hours the charge battery settled down to 12.50 and the run battery went back up to 1.28 where it started from. |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 30/01/2009 : 11:41:59 AM
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| has anyone seen a scope shot from a joule theif, be nice to see if the wave form could be clipped for potential with a pwm or something, i was thinking something like pwm>>joule theif>>ignition coil>>cfl or even using it inline for the self running generator as per the community project what do you more experienced guys think? |
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JustAnElectrician
Advanced Member
USA
257 Posts |
Posted - 01/02/2009 : 2:55:36 PM
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quote:
Originally posted by slayer007
The second winding is about four times bigger than the primary coil.
It's also a bigger gauge wire 20 or 21 and the JT is a 23 gauge.
I had to use the analog meter to read the power off the secondary coil.
The digital meter would just go nuts I couldn't get a reading off it.
I'm thinking the digital meter was reading some of the HV spike from the second coil.
I get that too, my "cheap" digital meter reads the spike and my good
digital meter gives a more "RMS" type reading... costs about 4 times as much also.
...just an Electrician! Since 1985... |
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slayer007
Starting Member
USA
17 Posts |
Posted - 05/02/2009 : 09:59:12 AM
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Anyone making a joule thief make sure you use ferrite cores.
The colored ones are iron powder they dont work as good.
With an iron powder one I cant even get any voltage out of the secondary coil.
And the BEMF was about half of what it should be.
So make sure you get ferrite cores they work a lot better. |
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JustAnElectrician
Advanced Member
USA
257 Posts |
Posted - 05/02/2009 : 3:33:54 PM
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I got a couple sketches of multiple coils on a common core, seems one of the ideas I had is similar to the JT.
Great to know I had an "idea" which actually works, even if it is not original. My variations could have some
merit too, the most likely would be to have the bigger pickup coil between 2 of the smaller drive coils, perhaps
the small ones would be opposite wound (CW and CCW) to deliver their impulses into the larger middle coil.
Kinda like this:
-small-LARGE-llams-
or:
-small-LARGE-small-
The first one with reverse spelling (-llams-) denotes reverse windings.
Then we could discover what happens with signal phasing as in the first small
coil is pulsed ON while the second small (or llams) coils is on the OFF pulse.
Then try in phase, etc. until all iterations are explored. What about echo-phasing?
Like following an On pulse a few milliseconds (or less) just to see what happens?
Intriguing, to say the least.
...just an Electrician! Since 1985... |
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slayer007
Starting Member
USA
17 Posts |
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JustAnElectrician
Advanced Member
USA
257 Posts |
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slayer007
Starting Member
USA
17 Posts |
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JustAnElectrician
Advanced Member
USA
257 Posts |
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The_Lad
Starting Member
Canada
3 Posts |
Posted - 01/03/2009 : 04:30:43 AM
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| This invention is amazing! just wondering how i could hook something like this up (using the supercaps as well) to my electric scooter? |
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theremart
Advanced Member
154 Posts |
Posted - 01/03/2009 : 06:36:40 AM
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Yes, I have been running this circuit for about 4 days swapping the batteries back and forth running an led. I am amazed of the energy that is stored after each swap.
See my playground here --> www.youtube.com/marthale7 |
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teep
Forum Admin
United Kingdom
347 Posts |
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theremart
Advanced Member
154 Posts |
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Lidmotor
Junior Member
USA
51 Posts |
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curious4h20
Starting Member
1 Posts |
Posted - 27/03/2009 : 06:52:03 AM
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hi all.
great work, and keep it up.
Has anyone yet used a core of a fly back transformer out of an old TV/Pc Monitor instead of a torriod coil. I know they arent round but they still have a closed loop of core? Maybe wrap coil onto a tube and then slip core through the coil?
hope this helps if you cant wait for your coil in the mail |
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Big Joule Theif
