Flyback transformer driver 2n3055 pinout

Flyback transformer driver circuit diagrams, schematics. This instructable will show you how to make a cheap and simple driver circuit in order to get high voltage arcs out of a component called a flyback transformer. This circuit, also incorrectly known as the 2n3055 flyback driver, bears some resemblance to the battery invertercontinuity tester which is published here. The power transformer was salvaged from a small hp frequency counter, and has 250v, 18v, and 7v windings. The step 9 page going further now includes a way to measure these illustrious voltage spikes with a regular volt meter. Now we need to find the 0v pinout for the secondary coil. This is an efficient flyback driver for modern cylindrical rectified television flybacks. I pushed it higher for short periods and it survived and gave surprising performance. I will explain to you nine common faults that you can find in a defective flyback. It will make a several thousanddegree continuous 2 cm plasma arc. There are many ways to build flyback drivers, but even though some of newer designs may seem more stable or effective, the 2n3055 with 2 resistors, is by far one of the more simple designs.

Testing flyback transformer for computer monitor is complicated if you do not know how to test it. Jul 20, 2008 so for my first real flyback driver, i built a dual 2n3055 transistor based flyback driver. Apr 15, 2019 autodesk instructables, 2n3055 flyback transformer driver for beginners robert gawron, high voltage supply 1030kv made from crt television flyback transformer electronic repair guide, what is flyback transformer. Wells gardner k7000 series flyback transformer 053x0528001 this works for the. Anyhoo when i get a customer thats got a failed lcd or plasma tv and i trace the problem down to a. Ultra simple single transistor flyback driver circuit. The main hv out on the secondary coil is a big red cable with a suction cup.

Maybe it is time to find another flyback transformer if the arcing is so severe if you have any additional questions about the zvs driver, please ask them in that article and not this for the 2n3055 driver. If the transformer buzzes loudly, smokes or makes noise then unplug immediately and start again. A flyback transformer, sometimes called a line output transformer are used in. This simple driver circuit is quite efficient if tuned correctly, and in some cases quite. Pdf analysis and design of the flyback transformer. Mar 17, 2012 this article will be regarding the socalled flyback transformers, a wellknown term in the high voltage hobby, and their various types of construction and output. The zvs flyback driver it is probably the most powerful and efficient flyback transformer driver that was fairly recently invented by vladmiro mazilli. Tv flyback transformer replacement repair all about circuits. The mazilli zvs flyback driver is wellknown throughout the high voltage community for its simplicity and ability to deliver 2050 kv at high currents for a flyback transformer. Merhaba arkadaslar bu defa 2n3055 transistor ile yuksek gerilim trafosu flyback transformer icin surucu devresi yapt. Simple circuit using 1 transistor, a few resistors and capacitors to easily generate a high voltage from transformers from tvs and computer monitors.

Using a mosfet instead of a 2n3055 would allow you to use much lighter resistors, a 14 watt, and they could be 100 times their current resistance because a mosfet is essentially a transconductance amplifier while a 2n3055 is a current amplifier, hence the need for lower resistance values. Oct 20, 2007 using a mosfet instead of a 2n3055 would allow you to use much lighter resistors, a 14 watt, and they could be 100 times their current resistance because a mosfet is essentially a transconductance amplifier while a 2n3055 is a current amplifier, hence the need for lower resistance values. The danger is minimal, as fly back transformers are intrinsically low power devices, not capable of outputting lethal. Browse digikeys inventory of flyback transformerswitching converter, smps transformers. Anyhoo, i do a lot of repairs to various electronics for work, but also for fun as a hobby. My 24kv high voltage jacobs ladder from diy flyback transformer driver using 555 timer. Single transistor easy high voltage flyback transformer. Efficient flyback driver high volts circuit using ic555.

So, i shall try to give you a simple method to find the primary coil input pins and also the 0 v output pin of the hv secondary coil. Flyback transformer wurth elektronik switching converter. Simply take the hv lead and bring it near the pins on the bottom. So for my first real flyback driver, i built a dual 2n3055 transistor based flyback driver. The main problem, in most cases, is that you dont know the pinout diagram of a flyback transformer. Flanged power transistor packing unit shell cold war world wiki mazilli zvs flyback driver kaizer power electronics wiring rv domestic electric circuit. Flyback transformer drivers uzzors2k hobby projects site.

For your information, the ac pulse generated by the flyback transformer cannot be check with our normal analog or digital meter. Im new to this forum but found you guys while googling around trying to find some answers. Unlike a normal transformer which operates at 50 60hz, a flyback transformer is designed to operate at high frequency, so we cannot simply connect a primary on the flyback powered from the mains do not do this. The dc to dc flyback converter with transformer isolation was designed and the test was implemented. This is an efficient flyback driver circuit, a good and fairly efficient flyback driver circuit.

The flyback vertical portion of the sawtooth wave can be a potential problem to the flyback transformer if the energy has nowhere to go. Instead, we need a circuit to generate a high frequency as input to the primary coil. The flyback transformer pinout will also generate high pulse ac which later convert to dc through an ultra fast recovery diode. In some side notes the person said that instead they used a 2n6673 npn power transistor. With just a few additional parts, it can produce nice wavey arcs and even power a jacobs ladder traveling arc. Well, if you take a peek into every classic fat crt television or monitor, whether vintage or modern, you are going to find one. Ga3172al specially developed flyback transformer for use with microchip pfc led driver.

Flyback transformer driver for beginners diy tesla coil. May 21, 2007 my 24kv high voltage jacobs ladder from diy flyback transformer driver using 555 timer. I was looking for newer flyback driver designs and came across this one after quite a bit of searching. So, i give you a simple method to find this 0v pin. The energy from the inputs is stored in a magnetic field to be released to the outputs at a slightly later time. An17 flyback transformer design for topswitch power supplies. Many sites doesnt provide circuits driving these transformers, they simply say that they are bad. These drivers were prone to failure and had high losses in.

Flyback transformer driver for beginners electronic circuit projects. Efficient flyback driver working on mains voltage 230v. Mazilli zvs flyback driver kaizer power electronics. This is an easy to make high voltage power supply uses the type of flyback transformer that has built in diodes, taken from a crt cathode ray tube type of tv. The step 9 page going further now includes a way to measure th. This circuit uses a common flyback transformer you probably have more than one in your house right now to boost typical battery voltages up to the multikilovolt range. Which one is the part number if you decide to search the internet for more information about the particular flyback. High voltage flyback transformer design and manufacture by.

Oct 17, 2019 efficient flyback driver high volts circuit using ic555. The schematic has been updated to include basic transistor protection in the form of a capacitor and diode. I hope that my pictures help to educate a better way to use this flyback transformer and zvs driver for demonstrations and experiments using high voltage. This circuit, also incorrectly known as the 2n3055 flyback driver, bears some resemblance to. With a common digital ohmeter it is impossible to find the secundary coil pinout because its resistance is much too high. Here are photos of my plasma globe driver and the globe in action. How to read flyback transformer part number electronics. The 6bg6 tube is a tv output tube that drives the flyback transformer. The transformer was build up by using a ferrite e core by placing a coil around the centre limb. Position the transformer 2 m away from the mains socket, don you safety glasses and plug in. Most of the others i had seen were simple 555 based drivers and ones similar to the single or double 2n3055 transistor design. The single transistor circuit a good candidate but there is no obvious way to limit the collector voltage. I build this circuit almost a year ago on a vero board, but it kept blowing the thin traces due to high currents flowing.

The high frequency used permits the use of a much smaller transformer. There are many ways as to why a flyback transformer fails. How to find the primary and the secondary coils of a flyback transformer. It is the same topology with almost the same efficiency, and its actually a nice example what happens when a primitive circuit like this is used with slightly bigger input.

Mar 14, 2015 this circuit uses a relatively simple transistor based oscillator circuit to drive the flyback transformer there are far more complex driver circuits out there but this circuit can be built simply with minimal knowledge and parts, most of which can be salvaged from an old crt tv. Pinout for those of you who have never seen a flyback transformer before, it may be a bit tricky to know where the primary, ground and other pins are. Coilcraft ga3172 flyback transformer for the microchip pfc. A wide variety of flyback transformer options are available to you, such as high frequency, power, and electronic. I was wondering, would just any power transistor work. Sainsmart zero voltage switching tesla coil flyback driver. The new flyback has two red wires and the smaller diameter red wire goes to the single pin post on the neck board and the larger diameter red wire goes to the white. When a person who has little experience in the world of projects, the information they find is critical. A flyback transformer differs from other true transformers in that it temporarily stores energy that it gets from the input voltage and current.

Thanks to lab hvps page for providing an instruction on how to find the pinout. High voltage with a television flyback transformer. For those of you who have never seen a flyback transformer before. How to make adjustable voltage by transformer 3a with transistor 2n3055 duration. This one uses a flyback transformer without a high voltage rectifier or with the. The flyback converter is used in both acdc and dcdc conversion with galvanic isolation between the input and any outputs. Alright so i am making a flyback transformer driver, however, in the schematic it asks for a 2n3055 transistor. Creating the flyback driver 20khz with 90% duty cycle. The 12sq7 is a highgain amplifier that boosts the feedback signals to oscillate the 6bg6 tube. Standard monitor flyback transformer with new primary.

The flyback converter is a buckboost converter with the inductor split to form a transformer, so that the voltage ratios are multiplied with an additional advantage of isolation. The ground pin can be found by finding the pin the hv arcs to the most. The flyback circuit diagram calls for two sets of coils. Creating an electric arc ive always wanted to create an electric arc but dont know how. I spent a lot of time for finding resonant frequency around 15khz and duty cycle. Flyback transformer design for topswitch power supplies. Texas instruments, understanding the basics of a flyback converter. A very simple road to your basic high voltage generator is the transistor driven flyback transformer. This article will be regarding the socalled flyback transformers, a wellknown term in the high voltage hobby, and their various types of construction and output. Do you know that there are many numbers printed on the sticker of a flyback transformer. Now your flyback should look something like the diagram shown below. The gist of it is that while one 2n3055 overheats very quickly, 2 paralleled 2n3055s will be able to split the current load and avoid overheating too rapidly.

How to find the primary and the secondary coils of a flyback. With your meter on ac volts, measure the ac voltage on each pair of windings apart from the primary. Mar 10, 2015 this is a high voltage flyback transformer driver. All parts can be obtained easily from radio shack, including the mosfet. Then i come across the theory that air breaks down at about 1mvm mega volts per meter 24kvin. A flyback transformer is just a particular mode of operation of a transformer. A transistor driven flyback transformer page angelfire. Typically the circuit calls for the 2n3055 power transistor. This one uses a flyback transformer without a high. The schematic has been updated to include basic transistor protection in the form of a capacitor and diode, the driver will function without them but i strongly recommend using them. Mazilli zvs flyback driver kaizer power electronics wiring rv domestic electric circuit. My box shows the primary side voltage of the zvs driver being applied with voltage, current, power and energy consumed by the zvs driver.