i am making attempting to make a tesla using two disposable trigger transformers wired together which are then connected to a cockroft walton circuit my problem is how do i wire the trigger transformers togther .can i just connect the two outputs together and connect it to cwm circuit
Quote from: salty58 on August 18, 2010, 10:58:51 AM
i am making attempting to make a tesla using two disposable trigger transformers wired together which are then connected to a cockroft walton circuit my problem is how do i wire the trigger transformers togther .can i just connect the two outputs together and connect it to cwm circuit
Please, define "tesla", and post the diagram, i'm sure that we can help you.
This circuit is a voltage multiplier, be carefull with this. You need specify if is Simple Wave or Double.
it is a stgc circuit i am trying to make using 2 camera flash boards with the outputs of the trigger transformers going to a voltage mutiplier circuit .just not sure how to connect the transformer outputs together not sure but i think it will be a simple wave
saw a similar by johnny davro on the net
Wrong Topic!!!
Quote from: salty58 on August 18, 2010, 03:12:17 PM
it is a stgc circuit i am trying to make using 2 camera flash boards with the outputs of the trigger transformers going to a voltage mutiplier circuit .just not sure how to connect the transformer outputs together not sure but i think it will be a simple wave
saw a similar by johnny davro on the net
why two?
i think that, if is a simple wave, you can connect the output of flash camera in the input of your voltage multiplier, because the multiplier input is AC current , you have to look what are the correct terminals on your flash camera.
forgiveness, is better documented nievesoliveras, and more faster ;)
so does that mean i can connect the output of 2 trigger transformers together and have a singlewire goihg to the voltage mutiplier .will that double the power going to voltage mutiplier so reducing the number of stages i need to obtain high kv going to the tesla coil
hope it is alright to post this here.. just didn't want to make a new thread and this one is very much the same thing..
just don't get to close as i did.. i was over 4 inches away and it got me.. hahaha
i'll post a schematic later when i make one.. it not like my jt toroid circuit like in my first videos
but it is very much a stungun circuit or strobe light circuit..
heres the video..
http://www.youtube.com/watch?v=_WTz9--gVTQ (http://www.youtube.com/watch?v=_WTz9--gVTQ)
robbie
High voltage is measured by the inch.
Those sparks looks about three inches long.
So there are a lot of kilovolts on that.
I dont remember how many kv per inch.
Jesus
Specifically for the making of a trigger circuit there is this instructable
I do expect I have copied the right link.
http://www.youtube.com/watch?v=UXI7B0j0Ajc
Jesus
jesus,
i think it is 30,000 volts per cm..
the spark on the coil is 5.58 cm
and the spark that hit me was 11.4 cm..
but anyway i drawed up a schematic.. below
Quote from: kooler on November 15, 2010, 10:17:21 PM
jesus,
i think it is 30,000 volts per cm..
the spark on the coil is 5.58 cm
and the spark that hit me was 11.4 cm..
but anyway i drawed up a schematic.. below
@kooler
If the current was much higher, you might've been killed.
I strongly prefer low voltage applications for that reason. When I have trained experience and more freedom in a better living situation, I might experiment with high voltage.
You were lucky that time. However, I liked your circuit so well, I downloaded a copy.
--Lee
Quote from: the_big_m_in_ok on November 15, 2010, 10:30:07 PM
@kooler
If the current was much higher, you might've been killed.
I strongly prefer low voltage applications for that reason. When I have trained experience and more freedom in a better living situation, I might experiment with high voltage.
You were lucky that time. However, I liked your circuit so well, I downloaded a copy.
--Lee
hahaha,
i was lucky 10 years ago while helping a friend work on oil furnances.. he said just pull the door and motor out and the safety switch will keep it from coming on while you replace the nozzle.. the safety switch was junk cuz i know what 10,000 volts at 23 ma's feels like on my elbow ..
i had to put some new paneling in this old ladies trailer because of that mistake.. she didn't care if i died.. as long as i got that paneling replaced first.. haha
i'm just a dumb old country boy .. right..?
robbie
Thanks @kooler!
The first transformer on the circuit. Is it a commercial one or you built it?
Jesus
i got it out of a dell crt monitor.. it doesn't have any markings on it.. just yellow tape
i got a couple of them..
you really don't need the center tap with resistor on the secondary i just used for a cap bleed..
i'm careless enough .. so i put it there so i would get shocked
robbie
Quote from: kooler on November 15, 2010, 11:49:47 PM
hahaha,
i was lucky 10 years ago while helping a friend work on oil furnances.. he said just pull the door and motor out and the safety switch will keep it from coming on while you replace the nozzle.. the safety switch was junk cuz i know what 10,000 volts at 23 ma's feels like on my elbow ..
I imagine the transformer was on the electric starter to spark the oil fumes and light them off? My aunt and uncle had an electric-fired gas furnace in central Ohio. In winter, when the power was out from blizzard-felled trees, they got cold---no power to light the furnace. Nothing they could do.
Quote
i had to put some new paneling in this old ladies trailer because of that mistake.. she didn't care if i died.. as long as i got that paneling replaced first.. haha
i'm just a dumb old country boy .. right..?
I used to live in the rural county of Ohio and Oklahoma, but I see what you mean. ;)
I always tried to be careful when working on line voltage. My Dad was a part-time TV repairman, so old-fashioned CRT picture tubes can be real dangerous. I know first hand.
Just look out. That goes for everyone.
--Lee
@ kooler
Nice circuit. I am surprised the ignition coil does not short. Do you know what kind of ignition coil it is?
Thank you @kooler! I will try to find that kind of transformer.
Jesus
Quote from: xee2 on November 17, 2010, 01:10:28 AM
@ kooler
Nice circuit. I am surprised the ignition coil does not short. Do you know what kind of ignition coil it is?
the coil is from a dodge ram 1500 5.2 liter
the little ford coil doesn't work as well for voltage but has some current on it like real red spark..
@ kooler
Thanks. I will try to get one. The JT part of your circuit looks brilliant. The diode should get the transistor to turn off fast - thus big voltage spikes. It should work great with a flyback transformer. I will be trying it as soon as I get some parts and some free time.
PS - I hope you are recovering from your fall.
thanks,
my back is healing slowly..
i made a small mistake in the schematic
tinycad did not put a dot on the emitter to negative.. didn't know if many people saw that.. (pese pointed it out.. thanks man)
yea the diode does make the cutoff alot sharper..
the cap on the base just reduces heat and gives a little more power .. you won't need a heat sink on the transistor.. it stays cold..
you can run this on a 9 volt battery.. but i was using a wallwart because 9 volts cost alot..
ps.. this circuit will short out a m.o.t. in the first 5 seconds.. but if you dip it.. you can get alot better sparks than the ign coil..
robbie
@ kooler
I got a few tests done. I really like this circuit. It should charge up capacitors really fast.
spark video = http://www.youtube.com/watch?v=SecMZ4h6Xbg
@xee2
That was a beautiful blue spark and very solid looking.
Jesus
@xee2
awesome..
looks like you made a efficient ozone generator..
question here ?? does the transistor need a heat sink on 12 volts..
i haven't had time to play with since last video..
robbie
@ kooler
When I drop the resistor to 50 ohms the circuit draws 1.36 amps at 12 volts - and the transistor still does not get hot without a heat sink. Amazing circuit. However, so far I have only run the circuit for a few minutes at a time since I am using batteries and do not want to drain them.
Quote from: xee2 on November 19, 2010, 10:26:34 PM
@ kooler
When I drop the resistor to 50 ohms the circuit draws 1.36 amps at 12 volts - and the transistor still does not get hot without a heat sink. Amazing circuit. However, so far I have only run the circuit for a few minutes at a time since I am using batteries and do not want to drain them.
i built this circuit to use higher power input.. and you just comfirmed my goal..
to do it without building heat..
i have a device that i am trying to make a more efficient circuit for and this was the circuit to replace the jt run transformer that blows transistors with heatsinks..
if all goes well you all will see the more simple and efficient device i being working on back before i hurt myself..
excellent work xee2..
robbie
@xee2
i fried my ign coils.. very sad day..
so i had to shoot a video of a flyback coil..
what is kool is i have a mot in a bucket of aw32 oil and the sparks off it at 12 volts 940ma's is awesome..
i won't do a video of it..
but heres the flyback
http://www.youtube.com/watch?v=mW0CYmx_L4s (http://www.youtube.com/watch?v=mW0CYmx_L4s)
robbie
You two are the masters of the high voltage spark!
@ kooler
Quote from: kooler on November 23, 2010, 12:00:34 AM
i fried my ign coils.. very sad day..
So sad .... :(
I made some videos of the Jacob ladder. It work at much lower voltage than any other flyback circuit I have seen. Your circuits are great.
9 volt battery >>> http://www.youtube.com/watch?v=cU0sLf5okZ0 (http://www.youtube.com/watch?v=cU0sLf5okZ0)
12 volt battery >>> http://www.youtube.com/watch?v=ATsH22ZN0vY (http://www.youtube.com/watch?v=ATsH22ZN0vY)
I hope you have a Happy Thanksgiving in spite of it all.
From the 9v video
jesus
thanks for posting the pictures..
it will help anyone who wants to build this..
xee2
nice videos..
i like a one transistors circuits.. (simple) and cheap
robbie
I have wo questions:
1. Is this possible?
2. Can anyone with the circuit already done and an extra flyback can try it?
Jesus
Ps
Also two 9v batteries can be used instead, changing the 100ohm with a 1k.
Quote from: nievesoliveras on November 24, 2010, 09:31:56 AM
I have wo questions:
1. Is this possible?
2. Can anyone with the circuit already done and an extra flyback can try it?
Jesus
Ps
Also two 9v batteries can be used instead, changing the 100ohm with a 1k.
i don't know about feed back but i do know.. that i had the same setup with a 9 volt
and by adjusting the spark gap closely.. you can get the input draw down to 20 ma's and still have a good spark..
i was getting 281 volts from ferrite transformer i made on the SG side.. but i didn't try to feed back..
but i will try after turkey day..
robbie
I will wait to see your results. It would be great if it works right!
Jesus
My circuit drawings had the wrong part number for the transistor. The correct part number for the Jacob ladder transistor is MJE13007. Sorry, I have a bad habit of leaving out one zero.
Neat stuff ! I love a little Jacob's Ladder.
Here's mine, using a 555 timer as the oscillator (so as to be able to vary frequency and duty cycle), switching a 2n3055, driving an ordinary 12v automotive ignition coil.
http://www.youtube.com/watch?v=VNL8QTS0sM0
I've got another one, using a more complicated circuit and a CRT flyback, that is audio modulated...it "sings" when plugged to an audio source. The amazing thing is that the sound begins to occur, with great fidelity but low volume, at voltages that are just short of making a visible spark.
The key to getting big voltages from your secondary is to switch your primary with as fast a rise/fall time as possible: that is, as square-edged pulse as you can manage. (Induced voltage is proportional to the rate of change of the inducing field).
For really _really_ high voltages, then, it follows that you need to avoid saturating your secondary cores with your driving pulses, and that these cores have to be low in inductance. Hence, the use of air core coils, which make it possible to take full advantage of VRSWR (voltage rise from standing wave resonance) in tuned, matched coils driven by square-edged pulses.
With flybacks and auto ignition coils, with their heavy inductances and saturable cores, it's hard to get over 50 kiloVolts; 20 or 30 kV is more like the usual operating range. The same circuit, driving tuned quarter-wave aircore resonators, can get close to ten times that voltage.