Drive Flyback ferrite using blocking oscillator

[rahulsurne]

Hi all, this is for my science fair project. I am trying to make an electric arc using ferite transformer in flyback mode. I have done a rough calculations of the windings and power source as follows.

Target voltage = 10-15K
blocking oscillator using transistor or bjt ot igbt.
power source 4/8 volt lead acid battery but not 9 volt mike battery. it doesnt give high current.

can anybody give me some schematics and winding ratios for the flyback transformer?

Thank you.

 

[jiripolivka]

Instead of trying to design a HV transformer with a ferrite of unknown parameters, I would recommend to try a flybackblock from an old TV set operated on 12 VDC. A typical HV is 10-15 kv without load, and the switching transistor can be driven from a 555 timer with ~15 kHz. The HV blocks are also safe to use if you know how to handle 15kV.