Why on a bread board and not build it directly onto the veroboard?
Well, it is a very good idea to build the prototype on the bread board before you solder the components onto the veroboard because...
- You will get a better idea on how to build a 'real' one on the veroboard.
- You can make sure all the components are working fine, if not, you can replace it easily.
- You can modify or tweet the circuit a bit to give the plasma speaker a better performance.
To connect the flyback transformer to the circuit, wind 5 or more turns of thick solid-core wire on the ferrite core. That will be your primary coil.