This circuit, also incorrectly known as the 2n3055 flyback driver, bears some resemblance to the battery inverter continuity tester which is published here. The step 9 page going further now includes a way to measure these illustrious voltage spikes with a regular volt meter. And, since i had this, i decided to make a driver, and, eventually, a jacobs ladder. Sep 11, 2011 so far, i have dealt with several powerful flyback drivers such as zvs and 555 timer.
I was wondering, would just any power transistor work. Since my dual 2n3055 driven flyback power supply was accidentally thrown away, i was pondering building another until coming across subject. The most popular onetransistor flyback driver is one that uses the ubiquitous 2n3055 npn silicon power transistor. Unfortunately i dont have a 2n3055 in my possession but ive the above mentioned three npn transistors and a power mosfet. Experiment at your own risk, and be aware that you may well loose your flyback 2n3055 flyback higher voltages. Im using a 2n3055 transistor rated for up to 15 a on the collector with power dissipation up to 115 w. This is probably the most well known flyback transformer driver circuit. Flyback driver circuits high voltage with a television flyback transformer. Some of them may give a slight spark but one of them should give a solid constant hv arc, this will be your hv return pin. 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. The schematic has been updated to include basic transistor protection in the form of a capacitor and diode.
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. Double braided wire with a grounded outer layer also works, but tends to rob a lot of power from the system. In this article we will comprehensively study a transistor relay driver circuit and learn how to design its configuration by calculating the parameters through formulas. This circuit isnt precisely the 2n3055 driver you have seen on other. 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. This circuit generates significantly higher voltages than the flyback was originally designed to produce. The most popular one transistor flyback driver is one that uses the ubiquitous 2n3055 npn silicon power transistor. The transistor gets a little warm, but not too hot to touch. The reason why ive put the 2n3055 driver in quotation marks is simple. As a last resort, you can try constructing a low powered flyback driver, like the 2n3055 single transistor one, then powering it on and placing the anode wire close to the bottom pins. When a person who has little experience in the world of projects, the information they find is critical.
This is an efficient flyback driver circuit, a good and fairly efficient flyback driver circuit. These drivers were prone to failure and had high losses in the switching devices. Nov, 2019 2n3055 ignition coil driver the resistors are all the standard 0. Flyback transformer electronics 2n3055 driver transistor driver. These 15 ampere devices can also be used in power switching circuits such as relay or solenoid drivers, dctodc. Since my dual 2n3055 driven flyback power supply was accidentally thrown away, i was pondering building another until coming across subject mentioned assemblies. So for my first real flyback driver, i built a dual 2n3055 transistor based flyback driver. Transistor relay driver circuit with formula and calculations. A flyback transformer, sometimes called a line output transformer are used in. Saya mahu membuat pengajaran yang terbaik tentang pemandu flyback 2n2055.
The 2n3054 and 2n3055 were derived from the 2n1486 and 2n1490 after package redesigns by milt grimes. The historicallysignificant 2n3055 was designed by herb meisels engineering group with rca. Usted puede hacer otras cosas con este controlador tales como destruyen algunos musica cutre. So far, i have dealt with several powerful flyback drivers such as zvs and 555 timer. Most of the circuits found use a simple but power 2n3055 transistor circuit in a self oscillation mode which energises a flyback transformer to. The transistor used in this circuit should not have a voltage rating higher than 250v, due to the higher base current needed of higher voltage rated transistors, this. Dual 2n3055 flyback driver posted by aonomus on july 20, 2008 so for my first real flyback driver, i built a dual 2n3055 transistor based flyback driver. The transistor model was chosen by designer in a way that it wont fry when operating with flyback transformer. The pnp bipolar power transistor is designed for use in high power amplifier and switching amplifier applications. Most of the others i had seen were simple 555 based drivers and ones similar to the single or double 2n3055 transistor design. Mazilli zvs flyback driver kaizer power electronics. I used a long terminal strip to arrange the resistor components.
Mar 10, 2015 this is a high voltage flyback transformer driver. This driver circuit is based on the commonly used 2n3055 transistor due to it high power switching capability. You know you have found the right pin to which the anode makes a continuous arc. Smarter versions like the kaizer power electronics 2n3055 flyback driver add a capacitor and diode to protect the transistor. Remember to mark the ground pin of the flybback voltage output. Darlington drivers 2n3055 mj2955 power transistors.
It will make a several thousanddegree continuous 2 cm plasma arc. The step 9 page going further now includes a way to measure these illustrious voltage spikes with. It uses two 2n3055 power transistors in a pushpull oscillator configuration. Hello mads, i built this circuit with a 12v 6 amp power supply. 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 2n3055 transistor is mounted on a 30 x 10 cm aluminium profile, this is just about enough to keep it alive doing long runs. Typically the circuit calls for the 2n3055 power transistor.
All parts can be obtained easily from radio shack, including the mosfet. The 2n3055 bjt cant be effectively switched by direct drive from a 555 or tl494 timer ic. A very simple road to your basic high voltage generator is the transistor driven flyback transformer. The driver single transistor 2n3055 version when you hook up all the components, heres how it will look like. The driver is built on a piece of vero board with multiply resistors to obtain the needed wattage rating, this is far from optimal as the load sharing between them is horrible, to ensure better sharing. Tv flybacks seem to perform best with this circuit, monitor flybacks dont put out as much. 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. Simple 100 watt amplifier circuit using 2n3055 transistors. 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. My flyback driver listed above worked beautifully until i pushed it too far and one of the resistors exploded, apparently killing the 2n3055. This is short flyback transformer test, hope you will like it, please dont. Vce limits of the transistor that must be observed for reliable. 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. Single transistor easy high voltage flyback transformer.
I pushed it higher for short periods and it survived and gave surprising performance. At 4 v, the system draws about 2 a and i get several thousand volts out of the flyback, as expected. Jan 22, 2020 in this article we will comprehensively study a transistor relay driver circuit and learn how to design its configuration by calculating the parameters through formulas. While these are cheap and high temperature tolerant, they are susceptible to voltage spikes caused by the inductive nature of the load ignition coil. I have been thinking of making a one 2n3055 transistor flyback driver. Flyback transformer driver for beginners electronic circuit projects. October 10, at the capacitor will absorb most of the high voltage 2m3055 occuring doing switching of the load. Transistor driven high voltage flyback transformer page. 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 fact you can even use a 12w for the 27 ohm resistor, but it may burn out if it is left to run for a long time. Efficient flyback driver high volts circuit using ic555. In some side notes the person said that instead they used a 2n6673 npn power transistor. Jul 19, 2018 2n3055 flyback driver for mac it is more powerful and much higher voltages can be obtained.
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. 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. The single transistor circuit a good candidate but there is no obvious way to limit the collector voltage. Oct 17, 2019 efficient flyback driver high volts circuit using ic555.
If the flyback doesnt provide the voltage you require, a solution is to build a voltage. I wonder what protection this could be and how to work around it. 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. Nov 19, 2015 smarter versions like the kaizer power electronics 2n3055 flyback driver add a capacitor and diode to protect the transistor. I build this circuit almost a year ago on a vero board, but it kept blowing the thin traces due to high currents flowing. An excellent choice for a pre drivers for both the 2n3055 and mj2955 are the tip120 and tip125 complementary darlington power transistors. Relays are one of the most important components in electronic circuits.
A flyback can set fire to a piece of wood just by sitting above it, and 2n3055 flyback may trail over insulators and burn them in the process. It is intended for power switching circuits, series and shunt regulators, output stages and high fidelity amplifiers. Oct 29, 2019 2n3055 flyback driver notify me of new posts by email. Jun 10, 2018 capacitive coupling 2n3055 flyback the secondary may also induce some voltage in the core. I have a flyback transformer that i got out of an old crt monitor. I was looking for newer flyback driver designs and came across this one after quite a bit of searching. While rated at 5 amps collector current they can provide the needed current gain and voltage isolation for the pnp mj2955. To be honest i m more interested in a simpler but powerful flyback driver, so i researched about drivers that utilise only one transistor. W6 zvs tesla coil flyback driver sgtc marx generator 1230v. The gist of it is that while one 2n3055 overheats very. Can a 07 npn transistor be used as a substitute for a. At voltages higher than 12 vdc input, the components will dissipate a lot of heat and the 2n3055 transistor is most likely to burn as it is not rated for more than 15 a and it has to be derated even further for case temperatures above 25 o c. After replacing the resistors with larger 510 watt ones, now the whole assembly wont work. However this too is prone to failure due to the transistor limitations.