2n3055 flyback transformer tutorial/guide

[high1voltage1rules]

Alex it me blackmesa25. I had to delete my account. Got sick of peaple sending me bad comments. Hope ya well.

[Jhfgsjdcd]

I am stupid. I think i fucked my transformer up . What i did is i got a mains transformer a stepdown, made a fullbridge rectifier it was 12 3 amps not sure wat happened but my primes started smoking then i tried rigging it up but i got nothing .did i burn it out?

[Jhfgsjdcd]

Yo thanks it worked , i was trying the highr winding higher voltage but i was limited on power i am using two six volt lantern batteries were do u buy 12v in the u.s

[Alex1M6]

@Jhfgsjdcd Ok. I am not sure if you can buy 12v lantern battery's but two 6v lantern in series is 12v which will work the same. I used a 12v lead acid battery for mine and I got it pretty cheaply at a local battery specialist shop. It might be worth asking at a local scrap yard as they will usually give you them for free or next to nothing.

Also do upload a video of yours arcing at some point.

[brandon14872]

@Jhfgsjdcd on amazon they have 12 volt lantern batterys.

[Jhfgsjdcd]

Yo i got the arc but i disconected connected and no arc

[Alex1M6]

@Jhfgsjdcd Sounds like there is a poor connection somewhere. If you used enamelled magnet wire for the coils then I would advise you to use a sharp knife and scrape off any excess enamel you might have missed.

Solder is the preferred way to make wire connections as it will not come loose.

[Jhfgsjdcd]

Sorry using ipod i cant i tried it but still no outpuy

[Alex1M6]

@Jhfgsjdcd Well when you get to a computer click the link as it is an instructable guide with all steps easily explained, plus there are some trouble shooting steps near the end of it.

[Jhfgsjdcd]

Ok so by that u mean just wiring the wire against the other ? Well i getting a weird thing that i thing my transistor is not working

[Alex1M6]

@Jhfgsjdcd Did you click on the instructables link?

[Jhfgsjdcd]

I cant get a god damn output been trying for a while but no please help

[Alex1M6]

@Jhfgsjdcd See the instructables link in the description.

[ExplosiveAnyThing]

Nice,but how long you can power this driver with this small heatsink?

[Alex1M6]

@ExplosiveAnyThing I have had this running for a couple of minutes with that small heatsink until it got too hot to touch.

[KhunroongPHD]

Thanks Alex

By follow your's I burned 3 trans. Then I put 0.1 UF btw E and C, 0.01UF btw B and C and also 56v zener and a normal diode paralel to each windings, It works but the arc go only 1/2 ".So far I sastisfy with that cus notthing hot. I aint sure what protect the trasist diode or cap. A suggestion that the wire to B and C must come from opposite end of the two coils and just after finish winding primary. One should use a 2 UF, a switch to connect a simple LC circuit to test if it arc.

[ExplosiveAnyThing]

@KhunroongPHD You probably need to reverse your feedback polarity.

[Alex1M6]

@KhunroongPHD Did you use a fast diode to protect the transistor?

[KhunroongPHD]

@Alex1M6 

Sorry I am not an electronician but a machinist, This is my first sophisticated circuit ever. What is a fast diode? Presently, I change from a fly-back to a motorcycle coil and a small teroid instead of a Fly-back

so great it work also with a little lesser length of arc. (I put primary wire of the coil pass to a small teroid and use around 25 turns to feed back. )

[toyu17]

@ Alex1M6 IS THERE ANYWAY YOU CAN REDUCE THE VOLTAGE TO A NORMAL 120-230VOLTAGE?

[Alex1M6]

@toyu17 I think if you use the built in coils and only use a low voltage (1.5max) to power it then you might be able to achieve voltage in that range. Oh and also I have seen someone on youtube take the core out and it gave a much lower voltage. But this method will be useless for mains/outlet powered devices as the flyback can only give out low current (2mA max) with this driver.

[toyu17]

@Alex1M6 so what's the voltage output on this flyback?

[Alex1M6]

@toyu17 I am not 100% sure but I think around 25kV-30kV (1kV=1,000v) as the arc was around 1 inch in length.

[toyu17]

@Alex1M6 as for the coil you saw them took out,was it the secondary coil they took out? and what do you mean by built in coil and 1.5 max? sorry i'm not knowledgeable in all areas of electricity.

[Alex1M6]

@toyu17 It was the transformer ferrite core they took out (see it here watch?v=u-FxtRxgiaw ). I meant 1.5v.

I think if you are intending to use this for powering a mains outlet powered device then it will be useless. This circuit gives very low current and the transistor can get very hot, thus making it unsuitable for extended use.

[toyu17]

@Alex1M6 thank Alex1M6!

[deepcut66]

Hi, thanks for sharing. How do i identify the pinouts on a flyback ?

[Alex1M6]

@deepcut66 Thanks, what sort of driver are you using? The easiest way to find the HV return is to wind primary and feedback wires onto the core, power it up and then just see which pin the bid red wire arcs to the most.

To find the built in primary coils just use a multi meter set to measure resistance. The built in primary will measure about 1 ohm and the built in feedback will be around 0.4-0.8ohm, but like I said it is much easier to wind your own primary coils on the core.

Alex.

[deepcut66]

@Alex1M6 Thanks for info, i didn't think of winding my own primary !

[Alex1M6]

@deepcut66 No problem ( : is it the 2n3055 driver you are using? if so then around 10 primary turns and 4-7 feedback turns on the core is a good starting point.

[deepcut66]

@Alex1M6

OK thanks again :)

[chilidress]

can a 2n3055 simple flyback driver destroy the flyback?

[Alex1M6]

@chilidress Not really, this driver is not very powerful.

[brandon14872]

i have a question, can you use a different transistor, and different resistor values?

[Alex1M6]

@brandon14872 Yes certainly, just make sure that the transistor is rated for high voltage (60v+) and high current as this circuit generates high voltage spikes on the driver side that can damage many transistors.

You may also want to use a protection diode across the transistor.

What transistor and resistor values are you thinking of using?

[brandon14872]

@Alex1M6 a C2238 transistor, and a gold,orange,black,brown resistor, and a gold,orange,pink,yellow resistor

[Alex1M6]

@brandon14872 Sorry, you cannot use those resistor's as they are of too high resistances for this circuit. That transistor *might* work if you put a protection diode across the collector and emitter in reverse bias.

[megges23]

Nice!

[Alex1M6]

@megges23 Thanks, hope it helped somewhat. If you want to see some real power look at my "ZVS driver on 24V" video.

[billg519]

You could get a lot more from the flyback by trying the zvs or "mazilli" driver. It is a quick and simple build using two mosfets. Because switching is at zero crossing, the fets do not heat up. This driver can actually melt a flyback, giving 500+ watts of HV if run off a strong power supply.

[Alex1M6]

@billg519 I have a ZVS driver video uploaded now.

[ExplosiveAnyThing]

put a capacitor in parallel and you will get more power ;)

[Alex1M6]

@ExplosiveAnyThing In parallel with the primary coil?

[ExplosiveAnyThing]

@Alex1M6 yep not the feedback ;) you will get more power because the induction... try it

[remzi133]

Thanks!

[Alex1M6]

@remzi133 Sorry it was not very good but I hope it helped you somehow.

[remzi133]

@Alex1M6 It's ok, but I have to buy some components, solder, and magnet wire. And I think I have a battery somewhere, otherwise Im gonna buy a Power Supply. Thanks

[Alex1M6]

@remzi133 If you look around for old electronics you can salvage these parts from old electronics. I got my parts from an old CRT monitor (perhaps your local computer shop might have one they can give you for free). For the power supply you can buy 2 6V lantern battery's very cheaply and use them in series for a total of 12V.

[remzi133]

@Alex1M6 I know, iv'e got some big staples of old Circuit boards too.

Thanks for the 2.6v lantern battery tip too!

[remzi133]

@Alex1M6 Is a car battery good too? I have one:

12V.

680A, Amps?

And 72 AH.

I actually don't know.

[Alex1M6]

@remzi133 A 12V car/bike battery is perfect for this type of thing. Just make sure you put a 3-5amp fuse in-line with the positive terminal to the circuit as to protect the battery in case of a short circuit.

Alex.

[remzi133]

@Alex1M6 Ok, thanks for the help.

[remzi133]

@Alex1M6 Sorry, it's too late, my electronics store is closed now, I hope I can go tommorrow to my electronics store.