A bigger battery wont improve performance but would last longer. Is there a limit on the number of Mosfets? I just built the ZVS driver pretty much identical to yours. Also, if this is correct, it seems that a perfect square wave would produce an infinite voltage across the inductor, but this is obviously not true. This is supposedly a volt ignition coil. The HV spikes will be produced in both directions due to ringing, but snubbing the initial reverse spike might be ok.

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On the whole circuit? Do you have any ideas of why not? A flyback may be a little more stable than an ignition coil, but if there is no load on the output you will still get some spikes induced back into your low voltage circuit. The capacitors and resistors do not have codes, you just buy something of the same value. This next circuit is designed for a higher powered output.

Help with 2N3055 Transistor

Silcone putty, Hot glue, mineral oil emersion messy etc?? This is your common ground.

I want to use it for automotive ignition system. How many volts can support an automotive coil? Can a blown capacitor on the rotary switch be the coill Almost any capacitor will work, but its capacitance will determine the frequency of the circuit.

This site is awesome. You May Also Like: You probably just need to limit the current with a R resistor. When the timer drops the voltage to zero volts, the coil sends high voltage from the negative side of the coil terminal to ground.


Really comes in handy when you’re categorizing random transistors. Actually I have four of those server power supplies for some 48V madness….

2n flyback driver | Kaizer Power Electronics

As you say yourself, the direction of the winding, or as its called the phasing of the feedback coil could be opposit of the primary coil and thus be driving it degrees out of phase, try to switch the feedback connections around. Hello, My son is creating a science fair project which needs to smoothly vary current through a solenoid coil from 0 to 10 amps, controlled by a Arduino.

You need a device known as an RF choke or an EMI filter between your mains outlet and dimmer circuit.

There is far too much “white space” around it, and the characters are so small that they are all blended together. So way way up that the voltage exceeds the breakdown voltage of the Vce on the transistor. The outputs of the 74LS04 feed another 74LS04and also to a terminal.

If you need a custom circuit made, please submit your information to the custom electronics page. I built a very similar circuit myself. Der strom, It is not likely to help unless you just make brief pulses at a very low frequency. Hey, I recently finished you driver circuit [the simple one], but when I turned it on, the diode started smoking and eventually cracked in two.


The transistor will be dissipating a peak power of over 30W and the resistors will be dissipating a maximum of W. The capacitor will absorb most of the high voltage transients occuring doing switching of the load.

2n3055 flyback driver

The outputs of the other 74LS04 also go to a terminal. I forgot to add a ohm resistor on the output of the timer, so is that my problem? Would it be worth the trouble to guard against back spikes dividing the Voltage by 2 in series like that? I guess I should have asked my previous question this way, How would this circuit differ using a hall effect sensor like the melexis us ua configuration and a ibgt transistor.

This circuit is only meant for low power continues run, as you have experienced, taking this up in power will also dissipate a lot of power in switching losses due to the very inefficient self-resonant driving of the MOSFET. Is is bad that corona appears traveling through the alkyd tower thing and into the inputs? A Voltage regulator would be better.

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