simple feedback driver for flyback transformer

[Shroommduke]

how much power does this take,, 6v * 4A = 24W but does it use or require that much power?

does anyone know?

[motto25]

how do you determine the ohms of your resistors?

[motto25]

why dont you need capacitors?



[maleshmawa2007]

HELP!!!, am using the driver but when I power it (PC power supply), the flyback core get magnetized but no HF noise or arcs, what do i need to fix? am using an older transformer from black & white TV. thanks

[Alex1M6]

@maleshmawa2007 Try switching the polarity of the connections to the coils.

[sprogdiklis]

what type flyback ur using

[31128Jeremy]

the arc is small!

[hardstyle905]

@31128Jeremy No shit sherlock. He's using 6V and a single transistor....

[MrSomeone4321]

thats not a neon tube thats a Xenon tube!!!

[RadioactiveLegos]

What pins do you use for the feedback winding? looks like 4 and 6 but I can't tell...

[a380rockerfan]

that is dangerous cuz he waz friggin close to xxxxxxxxxx voltage metal when he was holding that alligator clip! awesome vid though

[Driv3th3hiv3]

How do you find the Feedback winding on the transformer?

[zker666]

you can spend hours of hard work trying to find the original feedback, or you can do it the easy way, put on your own primary and feedback windings! putting on your own windings can let you adjust the voltages, power, and other things. hope this helps!

[Blodslav]

The feedback coil is typically 0.7 -1.5ohms on alot of the transformer models. Set your multimeter to ohms, attach the negative to one pin and keep trying all the other pins. make sure the feedback isn't connected to the primary. If anything its best to wind your own, just make sure they wind in the same direction. You can also get different currents and frequencies if you replace R2 with a small capacitor(just make sure its bipolar) And stop the spammin dude.

[zker666]

BABY ARCS!!!

[Driv3th3hiv3]

How do you find the Feedback winding on the transformer?

[GreenDay3366]

i suggest to use a better power supply, then the sparks will be much bigger! keep up the good work

[o0JohnnyReb0o]

How do you find the pinout of the feedback coil

[jimbobg65]

Trial and error with a function generator. Once you've found the pins for both coils, attach a function generator to one coil and measure the AC voltage induced on the other. Swap around and you will be able to tell which is which. The feedback coil is smaller so will induce a higher voltage in the main coil.

[Blodslav]

is there a list of transistors that would work for this circuit? I see you didn't add your own windings, which ones did you use?

[myztic123]

wtf this cables for high voltage. enjoy your shock sometime.

[skuitarman]

I ohm tested the pins on my transformer and I got a few .5 ohm coils and one 1.0 ohm and one 1.1 ohm coil, witch ones do I hook this circuit to?

[skuitarman]

can I hook this up

[Hanowair]

This exact same circuit was my first experience with high voltage. Nice memories :-)

[mumish13]

:) nice memories eh?

[stalkersas]

make the first scheme and power it with 30v 6 amp :) that's what i did and it burns like hell

[stutest2]

IT BURNS AND HURTS LIKE HELL!!!!!!!!!

[alwinovich]

to get longer arcs at 6 v use +- 120 instead of 220ohm

[wistwc]

I don't understand why you need to take apart the flyback and then buy transistor and heat sink and a whole bunch of stuff (including batteries, such a waste!) to do this experiment. Won't it be simpler to use the original circuit and connect to the mains supply.

[drewh0208]

Yes, it would be simpler to just take the picture tube out of a TV and use the circuit as it is, but then not only do you have the dangers associated with high voltage, but now you risk being electrocuted by the mains (which delivers much more current than the high voltage transformer).

Using the flyback in some of your own circuit designs could lead to better control/results, and you wouldn't have to lug around the rest of the circuits from the TV you pulled it from.

[FenixZ2]

With all the monitors I've tried that with I can't get it to stay on because of the "Power Saver" thing, so i get about 5 seconds before it blinks off, know how to pass that?

[drewh0208]

Assuming that you've only disconnected the flyback from the CRT and have left it in the original circuit boards, I can't really help you in overriding the "Power Saver" thing - is there an enable/disable setting?

[FenixZ2]

There is but it can only be disabled when there's a actual picture on the screen and then it's only till the monitor gets unplugged

[rockman378]

@drewh0208 hey i have a question; can the resistor values be 250 instead of 220 ohm's and 300 ohm's instead of 270 ohm's??

[SKarmytech]

my flyback is exatly the same has your even the appearence, i took mine from a CRT PC monitor, but i'm having the same problem has CrashByron on identifying the pins.

[CrashByron]

I don't understand your schematic? I could never figure out how to make a flyback work. Theres about 13 pins on the one I have. Holy Shit! this thing holds a charge! I just got zapped! Lol.. anyhow. what pins do I use?

[drewh0208]

The wires in the video have the same color as those in the modified schematic (0:04-0:08).

It's highly improbable that you have the exact same flyback transformer, so you could do two things: 1) find the amount of resistance between each pin to locate two sets of independent coils (see jnaudin,free,fr/lifters/labhvp­s/tht,htm), or 2) wind your own primary/feedback coils (see websites in video description). Just try different pin combinations with a low amount of power.

[17hmr243]

could you help give advice on my fly back 10 pin from PC monitor please?

[Hungryhowiepizza]

hey

you dont use the pins on the flyback you wrap 3 turns for the secondary and 5 turns for the primary on the open side of the ferrite core

[AerykR]

Pretty. I see you are neither too afraid to touch one pole of the HV. XD One small advice: use BU426A transistors instead, they are high voltage transistors which means they will not get fried by voltage spikes. Although touching one pole of the flyback's HV doesnt hurt at all, be careful and not to touch both HV poles at once. Not lethal but may give some jolt.

[drewh0208]

Well, I'd say it gives much, much more than a 'jolt', since this setup allows the arc to extend once it's formed.

I've used the same 2N3055 for a bunch of other FBT runs (see my "new flyback transformer with saltwater capacitor" video), but I'll look for the transistor you mentioned.

Would anyone know what a good alternative to the BUZ350 Mosfet would be (it's nonexistent)? I'm trying to make a Dave Lawton setup, but don't have that component yet.

[jaa93997]

the D1555 H-out transistor will give you POWER, so you can have big sparks and not wimpy ones. Remember, its not about voltage, its about how much energy you can deliver to the flyback

[98209276]

lol i made the same one but they have a limited life

[lo9765]

my feedback driver works better than this.I used two transistors from a computer switching power supply and as feedback resistor a 25W 220V lamp