defensehaser.blogg.se - Flyback transformer driver

FLYBACK TRANSFORMER DRIVER GENERATOR

it also appears to be for a 14 inch monitor. the number msh-d548 came up as a kaga flyback so im thinking thats a correct number.

being the middle digit on the flyback was illegible, i googled the number changing the missing digit from 1-9 every time.

Not bad I suppose.I'll probably etch and populate a PCB and test the circuit in the next post. I'm guessing at the cost of making and etching a PCB for this project at £3.00 They are currently on sale for £7.81 - I remember them being cheaper but they are becoming more rare! The total cost of components, not including the PCB or flyback transformer will be:įlyback transformers can be very easily sourced from old televisions, junk shops and everyone's favourite online auction site: In order to populate the PCB the following components will be required: Isometric Render of populated Plasma Speaker PCB

It also means I can spot any potential construction and layout issues before I etch and populate the PCB. Just for fun I've rendered the circuit in 3D using Sketchup so that I can visualise how the circuit will look once it is complete. This way I can get PCBS made for a reasonable price in China by Elecrow. If I was going to make more of these circuits I would design with surface mount components and reduce the size to less than 50 mm x 50 mm. I find it much easier to work with through hole components when prototyping. In designing this layout I was trying to make the circuit as small as possible but still use through hole components. I find it much easier to lay circuit boards out than to use stripboard to create circuits however stripboard would work perfectly well. I then designed a printed circuit board for the circuit. The voltage generated by flyback transformer at the secondary should be around 1.7 kV assuming I have guessed at the turns ratio of the flyback transformer correctly.

To make things easy for me and to ensure this circuit works as intended I simulated the circuit first.

FLYBACK TRANSFORMER DRIVER GENERATOR

This will take in a standard audio signal either from an audio amplifier or directly from an audio source such as an MP3 player or a signal generator - I haven't decided yet! The audio signal for the plasma speaker will be coupled to the circuit via the 5 mm screw terminal JP2. The flyback transformer will be connected externally via the 5 mm screw terminal JP3. The MOSFET will drive a flyback transformer which will have it's output at the secondary spaced so as to draw a high voltage arc. The output at pin 3 is used to drive two bipolar transistors which in turn drive a high current, high voltage N-type MOSFET. The mark space ratio of the square wave (the width of each pulse and the gap between each pulse) is set by the 50 k potentiometer RV2. The frequency of the square wave is set by the 50 k potentiometer RV1. Astable means there will be a constantly repeating 12 volt peak square present at pin 3. The main part of the circuit is made up of a 555 timer in astable mode. The 12 volt supply is smoothed by the 100 uF and 100 nF capacitors. Power is supplied via a standard 12 Vdc 5 amp power supply via the DC barrel socket or via the 5 mm screw terminal JP1. The circuit is fairly simple in operation.