And my flyback contains a capacitor its a one problem or no. I succeeded to get 1,5 cm arcs. What is the switching frequency, and inductance of the primary? You flyback transformer is perfect for the job, remember to turn screen and focus potentiometers on it way down. I will buy some soon enough and i thought that when i will find the correct configuration i will make a real PCB. Sorry just curious, awesome project!
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FETs have internal capacitance from drain to gate which couples the spike and kills your The main heat mosfet comes from the bad absorbed spike from the primary and the low rising and falling time of the but if you use a good driver like I said, mosfet will not heat anymore.
In the schematic its written if RC1 not used short it, it will be open not short.
Flyback Transformer Drivers
Also, where does the negative of the second supply go? November 16, at They are very convincing and can definitely work. Tired of measly sparks?
Also, thank you for making this post. Your arrangement with a couple of pots to set this and that, is NOT the way its done if you want a reliable system. Varying the voltage in the astable mode will produce a frequency modulated FM output. This circuit is nice msofet an intention is to get maximum voltages out of a flyback, by tuning the resonant capacitor you alter the efficiency, too.
Flyback driver #2: NE555 quasi-resonant
To really get good insulation you could use a opto isolator to trigger the fet, and use fylback supplys for both the fet and thebut I dont think thats really called for. Picture Entire driver assembled in case. That corona discharge between the high-voltage anode and a concrete wall is also spectacular. I made this simple NE Flyback driver. Proudly powered by WordPress.
Dustin, I suggest you get hold of a book on basic electronics or find some websites, you lack a great deal of common knowledge regarding basic electronic components, take care when working with high voltage! It should be around 1 ohm.
Accept and hide Reject Read More. April 9, at Why do you think the IC is been hot?
The flyback transformer is only connected to the circuit through the new primary coil that we wind on the open ferrite core, the MOSFET pulses the driver signal 5555 this primary coil to drive the flyback transformer. Home Questions Tags Users Unanswered. I have made this now and it works nicely, see it here http: This is to prevent a parasitic turn-on of the FET because fljback Miller capacitance. High voltage enthusiasts, who are familiar with the classic NE flyback driver, will notice the foil capacitor across the primary winding, which really makes wonders.
flybacktransformer – uzzors2k
Firstly, the drive for the mosfet is not well defined for negative voltage spikes at the gate. If the circuit can not produce a arc try to reverse the polarity of the primary coil on the flyback transformer.
I will measure some day. September 28, at Mads BarnkobSorry I was having a dumb moment and I can see my mistake looking back now!
Im testing the device and it works very well but it drains a lot flybadk amps… more than 15A at 12volts. I have some questions about the circuit. The arcs are gas heated to thousands of degrees, and staring at them is almost as dangerous as staring at an arc welder. Welcome to our site!