Simple DIY High voltage power supply using Flyback transformer
ฝัง
- เผยแพร่เมื่อ 10 ก.พ. 2025
- Hi there.
In this video, I will try to build a super simple yet powerful Flyback driver circuit which can generate super high voltages upwards of 60 Kilo Volts . I will also explain how it works and share my experiences in building it. Also i will share my mistakes, things I learned from this project, the Dos and Don't s of dealing with High voltages.
I hope you learn something new from today's video. Looking forward to your support in terms of subscription to my channel. It helps me come up with more interesting contents and makes my content visible to the infamous TH-cam Algorithm.
Link to the previous video explaining the magnetic energy storage in Flyback transformer.
• What is a Flyback Tran...
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Together, let's ENGINEER ! EXPERIMENT ! EDUCATE !
My Twitter page : / theknurdlab
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CAUTION:
Some experiments require working with HIGH VOLTAGE. It is important not to try and replicate the experiments if you don't know how to handle the same.
HIGH VOLTAGE IS DANGEROUS !!!
DON'T COME IN CONTACT WITH HIGH VOLTAGE ELECTRICITY !!!
IT CAN BE FATAL!!!
This is an educational video made to teach the fundamental concepts and design ideas. Unless you know what you are doing, or under the guidance of a trained professional, DO NOT TRY TO REPLICATE the experiments. The creator of this content take no responsibility for your actions or the losses that may arise as a result of it.
My good sir, thank you for your hard work and honesty. Although many may prefer the short and sweet, I truly appreciate you taking the time to explain everything as you have!!! Keep it up! And, thank you once more!
I'm happy that you liked my work. Thanks for the kind words.
Not boring. Great explanation. Just the right amount of technical talk and layman's examples.
Thank you for posting one of the few if not the only detailed explanation of a high voltage power supply using a flyback transformer. Your excellent "Engineer! Experiment! Educate!" approach inspired me to review the circuit in more detail. As I found, the circuit oscillates not because of primary and secondary winding voltages but because of the current limitations of the transistor. The transistor operation has 3 modes: saturated, active, and off. When the transistor is saturated, Vce is 0 volts, and the voltage across the primary inductor is fixed, equal to the supply. The primary current rises by V = L di/dt. Eventually the rising collector current exceeds the capacity of the transistor to remain saturated. It enters the active mode. Vce increases, forcing the voltage across the primary and the primary current to drop. Magnetic flux drops, secondary current drops, the transistor base current drops, and the transistor turns off. With the transistor off, secondary current flows through diode D1 and resistor R2, and the primary current flows through capacitor C1 and the power supply. The capacitor and inductor resonate for less than a full resonant period until the capacitor has discharged to the extent that Vce has fallen to a level where, with primary and secondary current, Q1 base current again flows, the transistor comes on, first in active mode then in saturation, and the oscillation cycle repeats. I will continue to experiment with the circuit to improve its efficiency and raise the output voltage. Thanks again!
Thank you I am glad I found someone willing to take the extra time. This stuff is fun I am addicted.
Glad that you found it useful!
This is an excellent explanation of this particular flyback. I've got one I got from somewhere I don't remember anymore and this is one of the few videos actually giving a comprehensive explanation of it.
Thanks!
Thank you!
Nice. These flyback transformers are used in the production industry of bottle filling. They put the HT onto a copper array on a double sided PCB that is sandwiched between two heat sinks. The heatsinks are grooved so that air passes through the grooves and over the HT on the PCB array. This ionises the air and produces O3, which is Qzone.
Ozone being very reactive is apparently good for killing germs. "With 52 percent more oxidizing power than chlorine, ozone will oxidize both organic and inorganic substances; remove unwanted taste, odor and color; and provide effective disinfection." - Spartan water treatment
Really the only difference between yours and an Ozone generator is a current ammeter and a pot to adjust the switching so that the amps can be adjusted. I cant remember how much it drew but it was basically always set at max to whatever the Flyback transformer was capable of producing.
I looked back in my notes - it was adjusted to 0.4A max. The machine used a 4~20mA control to adjust it down if required.
Impressive presentation and circuit design. Outstanding demonstration. Thank you for sharing such a hard work... 👍❤️
Thanks for showing interest. You are welcome.
Bro when there is no clear datasheet for 1010A , you designed and publish your own datasheet, that is awesome!
Yes, it took me a bit of playing around with my multimeter and RLC meter but glad to know you found it helpful. Thank you for the support.
Seen other and yours the best video :) Thanks.
Thank you my friend. I also new to electronics and this helped.
Glad it helped
Respekt 4 your work and many thanks...greetz from germany 🙂👍
Thank you.🙂
Loved your Videos. Highly informative and interesting.
Thanks a lot! God bless you!
I'm happy that you found them useful.
Great video! Thorough and informative. Would you please explain the difference in time bases, top and bottom, in the signal graphs, such as at 3:08 when you display the capacitor and VBE voltages?
Please look at the bottom left hand side of the graph. The legends with their respective colours are explained as to which axis represents what. Thank you for your kind words.
Thank you for your quick reply! Understood, the vertical axes are well-labeled. For the horizontal, it's safe to assume then that both signals are on the same time base, 5 microseconds per division, and that the top axis is not in time at but in some other units of measure denoted by "m". @@TheKnurdLab
Nice work. You have a lot of knowledge
Thanks for the kind words. I would come back soon with more such content.
First and foremost: I love your video. It is one of a few that explain the basics not to mention presentation of the waveforms and impact of component level modifications. Keep up the good work man, this is the kind of videos that make YT a better place.
Having said that I have a question: is there a way to limit the current consumption on the primary side? I want to build a HV generator for different purposes (electrostatic precipitator). I need output voltages in the range of 10-15kV but no arcs are intended, ever. I understand that the current consumption on the primary side is a function of input voltage and primary circuit's resistance. I also know that transformer's input resistance under load is a complex thing involving coil resistance plus inductive reactance. Now question: is there a way to reduce the current flowing through the primary without impacting the output voltage? An extra resistor in series, somewhere, perhaps? I don't care about the output power, I only care about output voltage. Thanks in advance for any further guidance!
Thanks for the knowledge
Thanks, liked and subbed :) Are you feeding the transformer pulsed DC (i skipped the circuit part) ?
Excellent video 😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍Loved it
Thank you!
what kind of varistor is used in this video...(voltage?)
If you are going to run from a battery then you can omit it. I was using it to prevent the high voltage getting back into the SMPS that I was using. Anything above 250v is fine I guess. It is just for a precaution. Even I don't see any use for it. But since I fried my lab power supply once, thought better safe than sorry.
I really enjoyed this tons of info thanks !
Happy to know you found it useful.👍
Thank-you so much sir for giving costly information
You are welcome. Thank you for supporting and showing interest in my content.
No thank you so much to you sir for providing provide this practical knolage
By the way i am a b-tech student
Brilliant
Wonderful and thanks. I want a high volts power supply. Can I buy from you. With an additional control on pulse switching. e.g On for 10-100 ms for every second. I want it to reduce the current in the primary by a factor of say 100 when the secondary is short circuited and thus prevent magic smoke😊
It is so helpful video..I want to make a variable high-voltage power source can I use this by varying input voltage or changing the capacitor C1??
and can you please share with me the full info on c1 And MOV?
MOV and C1 are just there to ground any high voltages that may find its way back to the source. I was experimenting and tend to make some silly mistakes. So didn't want that to damage my power supply. Later I learned from my mistake and just used C1 and MOV just in case. Not critical if you are using carefully.
can i change c1 to change the output voltage?@@TheKnurdLab
Nice, make a SSTC
it was an amazing video, can you also make an video on high voltage high frequency power source in which alone positive terminal can show corona discharge with negative terminal grounded ?
nice project! try making a ZVS driver.
Coming up as the next video on my channel. Stay tuned.
HI. Is it safe to touch the circuit when it is producing sparks? I am talking about both the high voltage ends and the general circuit
NO. NOT AT ALL. High voltage can be fatal. Please don't try to replicate unless you know what you are doing. The voltage at the output exceeds many thousands of volts. DON'T TRY THIS AT HOME. IT WILL GIVE YOU A FATAL SHOCK.
Great vid, what software were you using to model the circuit?
Electronics workbench by Multisim
If you were to immerse the flyback transformer & components in mineral oil, would you get a larger spark?
👍
Hello ! is it possible for you to tell me what software did you use for simulation, I am trying to look for alternatives to LTspice ? Thank you :)
very good video
whats your simulation source?
Thank you. I used NI Multisim for the simulation. You can also try PSIM. It is a good simulation software as well with lot of cool features.
Im new in electronic, so I appreciate the explanation details, is it possible to control this device to reach 20 kV and 9 kHz discharge ? I wanna use in experiment to generate Non thermal plasma in Dielectric barrier discharge
Yes, you may reduce the supply voltage and it reduces the output as well. You can also try to change the value of the capacitor. Please refer to the details I have spoken about it in the video itself. Note that I am running it from 24v DC to get such high voltages.
is 1N4007 and UF4007 diodes are different?
UF4007 is the high frequency version of IN4007. Basically it can handle faster switching speeds.
What is the model of the flyback transformer u r using?
I believe I have added that in the attachments. Links in description.
@@TheKnurdLab Bro i built it but there are no arcs and the resistors are heating.
I'm supplying 12v dc
@kanchanmisra2979 May be you have got the windings (pins) on the flyback transformer wrong. Please check the windings. Different models of transformers have different types of connections.
@@TheKnurdLab I'm using the same model u wrote on ur notebook i.e. bsc... 1010A
I'm using pin 2 and 3 as primary and 7 and 8 as feedback.
I'm using 2W 220ohm and 20ohm resistors.
Ps can u give me ur whatsApp no. I have to making this as school project pls pls pls pls pls 🙏🙏🙏
Ps2 I'm a boy
Please check if you have wired the transistors properly. Emitter, Base and Collectors. Refer to the datasheet of the transistor and find out the pins. If they are wired right, then check if the transistor is working. You can do a basic transistor test with a multimeter. Google it. If you don't know electronics or electrical basics, then I would advise not to proceed. The voltages involved are dangerous. It can be fatal. Follow the safety protocols or work under the guidance of a trained professional. I would advise not to proceed if you don't know what you are doing.
Well done on taking the time to trace the pin outs of the transformer. I have copied your circuit, and tomorrows project is to produce a working example. Clever way you used self resonance rather than trying to match a driver tuned to the transformer. Also, did you leave the internal tripler, focus & A1 controls in place, or did you bypass them as you circuit indicates?
Thanks for sharing!
Cheers
Pete'.
I left them undisturbed. I cut out the extra wires though(mine had 3 wires out of which I cut and epoxied two) leaving behind only the HV output wire. Happy to know you found it useful. 👍
@@TheKnurdLab Thank you for the quick reply :-). Good to know I won't have to excavate my way into the side module. The other two wires you cut are for the focus, and the A1 supply for the picture tube, being fed from the two pot's.
Cheers
Pete' New Zealand.
I am having trouble to identify pins on my flyback. my multimeter is slightly disaligned and shows 0.8ohm resistance at normal. what should i do?
1:56 I have shown the pin numbers of the particular model of Flyback transformer I am using in the video. You may please refer that. If you have a different model, please try searching the part number and you may find the circuit diagram hopefully for your model.
@@TheKnurdLab that's the problem. The shopkeeper whom I purchased the transformer from said we don't give datasheets. Been a month since I have been searching for it. TF 0107 its name
Could you type in the full series of numbers? Let me give it a try.
❤️
Do you get much smell of ozone ?
Not when powered for a short duration. But when the arcs are made continuous, yes.
You know that zvs circuit is better and more efficient in such applications ...
The explanation was very good though ....
Yes, infact I meant for this circuit to be a simple HV power source. But I wanted to understand it better and indepth. Thanks and I'm happy you found the explanation useful. I have explained the ZVS circuit as well. You may watch it if you are interested.
I'm use c2 = 0.47uf and i don't have c1 , my circuit no working any help
The output voltage is ac or dc?
It is AC but the flyback transformer has a built in diode which rectifies the AC and makes it DC
Bro input 10k v diagram
You may try increasing the capacitor C1 value. As you increase the capacitance, the frequency decreases and so does the output voltage. The Circuit remains the same.
@@TheKnurdLab thanks bro I will try thanks
How perching
Sorry. I didn't get you...
Complete kit required please address phone number details