I wanted to do a audio modulated flyback arc with few components and a small form factor. A simple method to get a more accurate estimate of your voltage might be to build a voltage divider with a sufficiently high resistance that you don’t bleed off too much power, and then to measure the rms voltage across that. I have used one of those in a different based LOPT driver and it worked fine. I did tune the frequency for the flyback 39kHz and the performance is really nice. At the moment the MOSFET switches off, the drain voltage initially spikes high because of the leakage inductance of the transformer, but then it settles down to a voltage that’s proportional to the secondary voltage by the turns ratio of the transformer.

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Subscribe To Posts Atom. These pins are usually beside each other. Neon needs about 80V or higher in order to light up.

If so what is your email address? Not to be rude, but ask yourself if a 10K potentimeter set at 9K would equal a 9K potentiometer….

December 13, at It should be around 1 fltback. One thing that surprised me when I was a newb was finding out how dangerous just looking at arcs and sparks can be.

555 Flyback Transformer Driver

This is going to be for a year end physics project for now as I am new into this venture. I have used one of those in a different based LOPT driver and it worked fine. I momentarily plugged the main supply to mains without the lamp, 2 sec plugged in and nothing happened.


No, only one, but i tried with another to check if the problem was IRFP. The 13kV HV diode that came with the flyback is about 6cm long. Any suggestions to fix this?

I got so much help from this site. I have tested it before with another circuit so I know it works. I tested between 3 to 15 V and i can get 3 A and some 2 cm arcs but everything is going wrong because of electromagnetic interference. Transfomer all your connections, see if the is latching up, and if all else fails try a different flyback and remake the circuit. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Hey Giorulesall I am not tranformer, but when the circuit runs open loop there could be transients going backwards in the circuit and other stress factors that could make the MOSFET squelch.

– NE Flyback Driver MOSFET failiure – Electrical Engineering Stack Exchange

May 22, at Can I use two 10k pots instead as I can not find any places to get 9k pots close to where I live and ordering online could be expensive for just one 9k pot. The same thing for output. October 2, at I installed a 9K potentiometer as R1 and a 10K potentiometer as R2, I adjusted the potentiometers till I had a nice silent thin arc at about 15 mm length.

June 14, at As this circuit has the timer supplied from the same source as the primary circuit you can not supply it with more than the maximum ratings for the specific timer type you use, look it up in the datasheet.


I did put a little flybck and is working fine at least for 2 minutes of continuous operation generating Ozone. One and a half years later I decided to try this again, but this time I knew what I was doing. If the circuit is pulling current and you have a whistling sound from the flyback transformer, I will assume that the circuit actually works. I got it to work!

Dear, What is the name of the transdormer to made the nice stripboard layout? Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. After you confirm that, compare how much does the voltage drop on your battery 5555 when you connect it back again.

Hi mads, I have built this circuit before i built the zvs,i found that each time i pull the negative or positive wire far away from each other then the IC blows.