#2n3055 transistor gap 73 drivers#
#2n3055 transistor gap 73 driver#
#2n3055 transistor gap 73 tv#

LC circuits resonate at a certain frequency, and by tuning the circuit so the transitor osciallates at the frequency of the LC circuit, the amount of power output is greatly increased. the capacitor (even though it might not appear so) is wired across the primary coil, forming a capacitor-inductor (LC) circuit. The transistor oscillates at a frequency set mainly by the primary and feedback coils working in tandem. The capacitor in this circuit is what is key to the high output power.

If it has a comparable or higher voltage and power rating and a comparable or faster switching time, you're all set to use it. To figure out if your diode works, google BY500 and find a datasheet, and then find the data sheet for your diode and compare them. When choosing the diode, you want one that has a high voltage rating and fast switching. I used a GI824 that I harvested from a TV. The diode on the schematic does not have to be the same type however. The diode protects the transistor from surges of reverse polarity charge that tend to kill the transistor without it.

#2n3055 transistor gap 73 drivers#

What makes this circuit differ from the single transistor drivers that are more common is the addition of the diode and capacitor that is wired in parallel with the diode. More turns gives more output amperage, not voltage. The number of feedback turns (the coil with three turns) can change power output as well. Larger values will lead to more output amperage (and hotter arcs) but less voltage. The capacitor placed near the transistor (.47 uf) can be changed for different power outputs. Making the value smaller means more heat though, which in turn means shorter amounts of time the circuit can be operated. In my circuit, 20 ohms was used by wiring two 10 ohm resistors in series. The smaller the value, the more power produced. The bottom resistor can be changed for more power. This value is not really critical to the operation of the circuit, but to minimize heat the highest value that the circuit runs on should be used. In my circuit, 450 ohms was used, made by wiring three 150 ohm resistors in series.

The 470 ohm resistor can be changed for a different value. I will say this though Many of the parts can be substituted, and the circuit can be tuned by doing so: The parts needed are listed on the schematic on this page. This circuit uses very little in the way of parts. The theory of the circuit is discussed later in the Instructable. In this circuit, a few components have been added which dramatically increase the power that the circuit can put out. The bad reputation for the 2n3055 comes from it being used in the usual single-transistor flyback driver, which puts a lot of stress on the transistor. That being said, this circuit works incredibly well with it.

They are prone to burning out, sometimes spectacularly. Loved because it is so easy to get (even Radioshack sells them) and hated because they generally stink.

#2n3055 transistor gap 73 driver#

This circuit uses the venerable 2n3055 transistor, which is loved/hated by flyback driver builders. This Instructable is intended to take much of the theory presented in the thread and condense it into a quick how-to for beginners. I am going to say right now this is not my circuit. Almost all modern flybacks have an air gap, so if a new on is being used, checking is not necessary. This means that the core is not a loop all the way through, but is rather shaped like a C with the gap being about a mm thick. Make sure that the flyback transformer you are using has an air gap. So for this project they are recommended. That being said, DC flybacks are easier to get. The AC flybacks can operate at higher power, since there are no rectifier/multiplier circuits built into them like the DC flybacks. Older flybacks had AC power output, making them the ones you want. Many modern flybacks also put out DC voltage.

#2n3055 transistor gap 73 tv#

Every single CRT (big, heavy kind) TV that people are throwing out now has one, the bigger the TV the bigger the transformer.Р”В«ut unlike many transformers that you find in electronics, which are designed to handle standard 60 hertz AC power, and are step down transformers, flyback transformers operate at much higher frequencies- around 16 khz or sometimes higher. High voltage can be dangerous or lethal when used incorrectly, and it is up to the user of the circuit to use high voltage safety rules and maintain their own safety at all times.Р”Р‡lyback transformers are some of the most commonly used high voltage supplies by hobbyists- mainly due to their relative simplicity and how easy they are to find. I am not responsible for any bodily damage or property damage that is a result of one building or using this circuit.