A very simple road to your basic high voltage generator is the transistor driven flyback transformer. Electronic project circuits tv flyback driver with 2n3055. This is short flyback transformer test, hope you will like it, please dont. The driver single transistor 2n3055 version when you hook up all the components, heres how it will look like. How to make a simple flyback transformer circuit our. B is the base terminal, c is the collector terminal, and e is the emitter terminal. A flyback transformer fbt, also called a line output transformer lopt, is a special type of electrical transformer. Simple circuit using 1 transistor, a few resistors and capacitors to easily generate a high voltage from transformers from tvs and computer monitors. Remove the metal bracket, and pull the core halves out. June 20, at this driver is among the simplest, with just six components it will be able of delivering high voltage with a strong enough current for various experiments. You know you have found the right pin to which the anode makes a continuous arc.
I have been thinking of making a one 2n3055 transistor flyback driver. This will further reduce the base drive by transformer action to the base winding, and the transistor will quickly turn off. Jul 08, 2018 transistor flyback a zener will cause flyback energy to be dissipated more quickly, but most of it will go into the zener. Mar 17, 2012 as a last resort, you can try constructing a low powered flyback driver, like the 2n3055 singletransistor one, then powering it on and placing the anode wire close to the bottom pins. Typically the circuit calls for the 2n3055 power transistor. I build this circuit almost a year ago on a vero continue reading. Can a 07 npn transistor be used as a substitute for a. Say if you had a 33 ohm and a ohm resistor they would still work fine for this circuit. Flyback transformers also called as lots line output transformers can be seen in old crt monitors and tvs and these yield output voltages upto around 18000 30000volts. Most of the others i had seen were simple 555 based drivers and ones similar to the single or double 2n3055 transistor design. Understanding a single transistor flyback transformer driver. This causes the inductance to drop, which increases the rate of rise of primary current dramatically. Also, im worried about the back emf of the flyback. 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 generates significantly higher voltages than the flyback was originally designed to produce. Can a 07 npn transistor be used as a substitute for a 2n3055 in a flyback driver circuit. Connect one of the feedback coil wires to the b terminal of the transistor and solder into place. The schematic has been updated to include basic transistor protection in the form of a capacitor and diode. And, since i had this, i decided to make a driver, and, eventually, a jacobs ladder. The single transistor circuit a good candidate but there is no obvious way to limit the collector voltage. My flyback driver listed above worked beautifully until i pushed it too far and one of the resistors exploded, apparently killing the 2n3055.
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. Efficient flyback driver high volts circuit using ic555. Jul 20, 2008 so for my first real flyback driver, i built a dual 2n3055 transistor based flyback driver. Connect the flyback transformer to the transistor, at the top of the which are b, c and e terminals. Because they act as a transformer, there are often extra windings on the secondary coil and provide lower 2n3055 flyback for other parts of the circuit, hence the large number of pins at the bottom of the flyback and they are used to power say the vertical and horizontal deflection coils, and so on. Oct 29, 2019 2n3055 flyback driver notify me of new posts by email. Flyback transformer driver for beginners electronic circuit projects. Here, in this blog i am going to explain you all how to make a lowcost driver circuit for a flyback transformer or a tv transformer. Oct 17, 2019 efficient flyback driver high volts circuit using ic555. Jun 10, 2018 2n3055 flyback drivers for windows download i normally run mine at 26volts, where it draws 4. Instead, we need a circuit to generate a high frequency as input to the primary coil.
As a last resort, you can try constructing a low powered flyback driver, like the 2n3055 singletransistor one, then powering it on and placing the anode wire close to the bottom pins. The transistor model was chosen by designer in a way that it wont fry when operating with flyback transformer. I was wondering what the output 2n3055 coil was, i need around volts at 60 amps, i was gonna use this for a project please respond asap. Een flyback transformator, ook wel genoemd een lijn uitgang transformator worden g. Different capacitors were tried, ranging from 10 nf to nf, nf was found to work the best for my flyback transformer.
I have a flyback transformer that i got out of an old crt monitor. It will make a several thousanddegree continuous 2 cm plasma arc. Hello mads, i built this circuit with a 12v 6 amp power supply. After replacing the resistors with larger 510 watt ones, now the whole assembly wont work. So for my first real flyback driver, i built a dual 2n3055 transistor based flyback driver. 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 make a simple flyback transformer circuit our pastimes.
It sounds like a over voltage protection, when you suddenly. These drivers were prone to failure and had high losses in the switching devices. I was wondering, would just any power transistor work. Unfortunately i dont have a 2n3055 in my possession but ive the above mentioned three npn transistors and a power mosfet. Here are photos of my plasma globe driver and the globe in action. 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. In modern applications, it is used extensively in switchedmode power supplies for both low 3 v and high voltage over 10 kv supplies. Transistor driven high voltage flyback transformer page. Objets requis1 flyback transformerin india it is known as eht2 b.
The circuit can be optimized by varying the number of turns and the resistor values. The high frequency used permits the use of a much smaller transformer. W6 zvs tesla coil flyback driver sgtc marx generator 12. Introduction 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. In some side notes the person said that instead they used a 2n6673 npn power transistor. Low cost flyback transformer driver circuit build low. I decided to use the 2n3055 push pull flyback driver, as it would be at least somewhat better than using just the single transistor 2n3055 flyback driver, and the parts would be easier to get and put together in a short period of time it was. I used a long terminal strip to arrange the resistor components. High voltage with a television flyback transformer.
As i slowly transistor flyback the supply to 6 v, the current transistor flyback rises to flybqck a and then the flyback suddenly stops outputting any voltage. Nov 17, 2012 i have a flyback transformer that i got out of an old crt monitor. The flyback vertical portion of the sawtooth wave can be a potential problem to the flyback transformer if the energy has nowhere to go. This design uses a 555 timer ic to feed a square wave to a tc4422 gate driver, which drives two irfp260 nchannel mosfets via a custom 1. Aug 24, 2019 merhaba arkadaslar bu defa 2n3055 transistor ile yuksek gerilim trafosu flyback transformer icin surucu devresi yapt. What i am trying to do is turn a coil that draws amps on and off using i have a 2na and a 2n which i was going to hook up as a. This is an efficient flyback driver circuit, a good and fairly efficient flyback driver circuit. Oct 25, 2014 instructables flyback driver loneoceans flyback drivers page plasmanas instructable on an fet based flyback most of the circuits found use a simple but power 2n3055 transistor circuit in a self oscillation mode which energises a flyback transformer to create the spark. Nov 19, 2015 electronic project circuits tv flyback driver with 2n3055. Dit instructable zal u tonen hoe te maken van een goedkope en eenvoudige driver circuit om hoogspanning bogen uit een component genaamd een flybacktransformator. I pushed it higher for short periods and it survived and gave surprising performance. Alright so i am making a flyback transformer driver, however, in the schematic it asks for a 2n3055 transistor.
Single transistor easy high voltage flyback transformer. These drivers were prone to failure and had high losses in. 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. Inbetween the core halves is a thin plastic spacer which creates the air gap. 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. I was looking for newer flyback driver designs and came across this one after quite a bit of searching. Both transistors 2n3055 must be mounted on large heatsinks. 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. Ultra simple single transistor flyback driver circuit.
The step 9 page going further now includes a way to measure these illustrious voltage spikes with a regular volt meter. It was initially designed to generate high voltage sawtooth signals at a relatively high frequency. All parts can be obtained easily from radio shack, including the mosfet. 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. You flyback transformer is properly fine, arcing between the bottom pins is normal as we tend to. Instructables flyback driver loneoceans flyback drivers page plasmanas instructable on an fet based flyback most of the circuits found use a simple but power 2n3055 transistor circuit in a self oscillation mode which energises a flyback transformer to create the spark.
Since you wont be running the flyback transformer in flyback mode anymore you can remove the air gap to decrease the idle current drawn. The output high voltage depends on the type of flyback and the supply voltage, but should be on the order of 1030kv. Transistor flyback a zener will cause flyback energy to be dissipated more quickly, but most of it will go into the zener. This circuit, also incorrectly known as the 2n3055 flyback driver, bears. Apr 23, 2017 also ive a motorola 2n6055 darlington pair npn transistor in my possession i saw a few online videos and circuits where people where using 2n3055 driver circuits. Posted in tagged 2n3055, flyback transformer, transistor 39 comments. I wonder what protection this could be and how to work around it. Flyback transformer electronics 2n3055 driver transistor driver.