Posted: 1/17/2016 10:10:06 PM EDT
| They almost always have an extra couple of wires coming off then, not the HV lead. What are they for? |
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Quoted: They almost always have an extra couple of wires coming off then, not the HV lead. What are they for? Those extra leads are taps for different voltages. They may or may not be needed for any particular design usage. |
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In my career I've designed many flyback transformers. Those extra leads are taps for different voltages. They may or may not be needed for any particular design usage. Quoted:
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They almost always have an extra couple of wires coming off then, not the HV lead. What are they for? Those extra leads are taps for different voltages. They may or may not be needed for any particular design usage. I've always wound my primary around the exposed part of the core. I usually checked for ground by just taking the stinger and finding which terminal produced the biggest spark. |
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Quoted: I've always wound my primary around the exposed part of the core. I usually checked for ground by just taking the stinger and finding which terminal produced the biggest spark. Quoted: Quoted: Quoted: They almost always have an extra couple of wires coming off then, not the HV lead. What are they for? Those extra leads are taps for different voltages. They may or may not be needed for any particular design usage. I've always wound my primary around the exposed part of the core. I usually checked for ground by just taking the stinger and finding which terminal produced the biggest spark. Even with CAD, during the design phase I had to manually wind those suckers and keep track of turns and winding directions - I HATED designing transformers... Especially if I had to design and interface with a mutually coupled inductor for regulation and noise reduction!!! |
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I hated designing transformers. Even with CAD, during the design phase I had to manually wind those suckers and keep track of turns and winding directions - I HATED designing transformers... Especially if I had to design and interface with a mutually coupled inductor for regulation and noise reduction!!! Quoted:
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They almost always have an extra couple of wires coming off then, not the HV lead. What are they for? Those extra leads are taps for different voltages. They may or may not be needed for any particular design usage. I've always wound my primary around the exposed part of the core. I usually checked for ground by just taking the stinger and finding which terminal produced the biggest spark. Especially if I had to design and interface with a mutually coupled inductor for regulation and noise reduction!!! Yeah, my design (if you want to call it that, lol) was just trying to figure out how to keep my MOSFET used for driving it from burning up, lol! 
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Quoted: Yeah, my design (if you want to call it that, lol) was just trying to figure out how to keep my MOSFET used for driving it from burning up, lol! Quoted: Quoted: Quoted: Quoted: Quoted: They almost always have an extra couple of wires coming off then, not the HV lead. What are they for? Those extra leads are taps for different voltages. They may or may not be needed for any particular design usage. I've always wound my primary around the exposed part of the core. I usually checked for ground by just taking the stinger and finding which terminal produced the biggest spark. Especially if I had to design and interface with a mutually coupled inductor for regulation and noise reduction!!! Yeah, my design (if you want to call it that, lol) was just trying to figure out how to keep my MOSFET used for driving it from burning up, lol! It's not about ball bearings - it's about the power loss snubbers in the secondaries....  |
| Been a while since I've played with one. I once made a singing arc out of one that was pretty neat! To drive it, I used a 555 timer running astable somewhere north of 20 kHz. I used the control voltage pin on the 555 to modulate some audio onto it and the result was an arc of electricity producing audio. Music, speech, whatever you like. Remarkably clear too. Not much low end response, but mid and especially high range was quite clear. The MOSFET got a little hot, but was manageable with a heat sink. |
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I hated designing transformers. Even with CAD, during the design phase I had to manually wind those suckers and keep track of turns and winding directions - I HATED designing transformers... Especially if I had to design and interface with a mutually coupled inductor for regulation and noise reduction!!! I did too.. thats why I swapped to IT here..
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Playing. Learning. I'll be building some sort of driver to make a Jacobs ladder, but really just playing. Quoted:
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So, what are you doing? Replacement? Removal? Just junking an old monitor? Playing. Learning. I'll be building some sort of driver to make a Jacobs ladder, but really just playing. Ah, I see. Just remember, were talking lethal currents here. Be safe! 
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WRONG. The tube holds the charge! Dischrge the tube before tugging on the anode connector. Quoted:
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What are we doing? HV experimentation? Be careful, those things hold a nasty charge that can last for days or even months after power down. WRONG. The tube holds the charge! Dischrge the tube before tugging on the anode connector. That's pretty funny, cause I picked up a flyback off the bench one time after driving it without thinking where my fingers were and got a nasty jolt. 
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Well, it must have been fucking magic, or had a capacitor on it, 'cause inductors or transformers only store energy when there is current going thru them. Stick to the custodial arts. It hurt pretty good for my imagination. I'm guessing there must be an internal capacitor in there somewhere.
Oh well, as you said, I'm just a dumb custodial arts moron. |
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It hurt pretty good for my imagination. I'm guessing there must be an internal capacitor in there somewhere.
Oh well, as you said, I'm just a dumb custodial arts moron. Quoted:
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Well, it must have been fucking magic, or had a capacitor on it, 'cause inductors or transformers only store energy when there is current going thru them. Stick to the custodial arts. It hurt pretty good for my imagination. I'm guessing there must be an internal capacitor in there somewhere.
Oh well, as you said, I'm just a dumb custodial arts moron. They do have caps. Turns out that what those extra wires are for. They are used to smooth out the image. Found this. 
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They do have caps. Turns out that what those extra wires are for. They are used to smooth out the image. Found this.  http://youtu.be/CXxkOQOK_uAQuoted:
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Well, it must have been fucking magic, or had a capacitor on it, 'cause inductors or transformers only store energy when there is current going thru them. Stick to the custodial arts. It hurt pretty good for my imagination. I'm guessing there must be an internal capacitor in there somewhere.
Oh well, as you said, I'm just a dumb custodial arts moron. They do have caps. Turns out that what those extra wires are for. They are used to smooth out the image. Found this. http://youtu.be/CXxkOQOK_uAI'll have to give that a watch when I have access to WiFi. I never could find any info on pinouts when I was messing around with them. As I mentioned before, I would wind the primary around the exposed part of the core. When I juiced it up, I'd find the ground by probing around with the stinger. Usually the ground pin would display a coronal discharge on its own without actually having to make contact. I've used everything from nails and screws to an old screwdriver to make the contact points. |
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What are we doing? HV experimentation? Be careful, those things hold a nasty charge that can last for days or even months after power down. Yes, yes they do. Don't ask me how I know.
I dared a friend to touch the flyback lead on an old Sony Trinitron tuber when we were kids, even his step dad joined me in egging him on. Holy shit! that was hilarious. He literally flew on his ass! |
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I got my flyback cleaned desoldered and wired up to a HF/HV driver from a compact flourescent light. It works pretty good.
Turns out the CFL boards will burn themselves up without a load :) I had to cut up two of them but managed to salvage a bunch of stuff off the first one. Video uploading of results. ETA: http://vid1054.photobucket.com/albums/s484/jestertooo/Mobile%20Uploads/VID_20160120_212429_zpsbc83kx4e.mp4 |
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Yes, yes they do. Don't ask me how I know.
I dared a friend to touch the flyback lead on an old Sony Trinitron tuber when we were kids, even his step dad joined me in egging him on. Holy shit! that was hilarious. He literally flew on his ass! Quoted:
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What are we doing? HV experimentation? Be careful, those things hold a nasty charge that can last for days or even months after power down. Yes, yes they do. Don't ask me how I know.
I dared a friend to touch the flyback lead on an old Sony Trinitron tuber when we were kids, even his step dad joined me in egging him on. Holy shit! that was hilarious. He literally flew on his ass! Yeah, ones still connected to the tubes can pack a nasty wallup also (as our astute friend mentioned) because the tube can act like a big layden jar. The internal caps can give a painful shock too! |
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Cool!
Getting the gap right at the bottom and spacing the rails just right is tough sometimes too. Quoted:
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I got a Jacobs ladder partially working. Think I need more power or higher voltage. Projects have been backburnered some. Cool!
Getting the gap right at the bottom and spacing the rails just right is tough sometimes too. Yup. I might have also made them too tall. I could make a new primary for the flyback instead of using the built in, but I would have to cut the thing apart to do so. Maybe a larger CFL driver (more current?) would help. I could also get a Xeon transformer or build a big 555 driver. It was a fun project. It would make some pretty purple arcs. |
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Yup. I might have also made them too tall. I could make a new primary for the flyback instead of using the built in, but I would have to cut the thing apart to do so. Maybe a larger CFL driver (more current?) would help. I could also get a Xeon transformer or build a big 555 driver. It was a fun project. It would make some pretty purple arcs. Quoted:
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I got a Jacobs ladder partially working. Think I need more power or higher voltage. Projects have been backburnered some. Cool!
Getting the gap right at the bottom and spacing the rails just right is tough sometimes too. Yup. I might have also made them too tall. I could make a new primary for the flyback instead of using the built in, but I would have to cut the thing apart to do so. Maybe a larger CFL driver (more current?) would help. I could also get a Xeon transformer or build a big 555 driver. It was a fun project. It would make some pretty purple arcs. I can't zoom in enough on my phone to see, but the flyback you have don't have half of an exposed core? You could make a driver out of a 555, TL 494 or several other ICs. You will need to definitely heat sink your FET though as they tend to run pretty warm. Another option is a furnace ignition transformer. I have mad a couple of Jacobs ladders from those. The secondaries are generally 10-12kV. They make that creepy 60 hz buzz too, like the old Frankenstein movies. They are a little more dangerous though because they can deliver several hundred mA and the lower frequency pretty much eliminates any skin effect. ETA, here is a video I found of one I built from a furnace x-former some time ago. Nothing fancy at all, but the arcs can climb to the top if you can run it where there are no drafts. View My Video |
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Playing. Learning. I'll be building some sort of driver to make a Jacobs ladder, but really just playing. Quoted:
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So, what are you doing? Replacement? Removal? Just junking an old monitor? Playing. Learning. I'll be building some sort of driver to make a Jacobs ladder, but really just playing. GM high energy ignition coil and driver IC will do the job very nicely. 2.5" arcs that can be very hot if you tune the trigger pulse correctly. |
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ETA, here is a video I found of one I built from a furnace x-former some time ago. Nothing fancy at all, but the arcs can climb to the top if you can run it where there are no drafts. View My Video broken link |
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Let's try this again View My Video
ETA, sorry for the sideways video 
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