Need a little help with flyback circuit

[Mattronium]

I have a "working" flyback driver and I can get up to 2 inch sparks using a laptop charger that gives 16V @ 4.5A, the problem is that the laptop charger that I'm using for power keep dying. The first died and only gave 7.4V after and the second one showed no voltage after it died.

Here is a link to a simulation of the circuit I'm using. It's a basic NE555 driver. (LINK) The 1nH inductor in the simulation is one of the yokes from a TV.

I'm thinking of just adding a boatload of capacitors at the end of the charger to filter any voltage spiks, and maybe adding a diode too. Although it might also be the hi "pulsed" current draw that's killing them?

I don't know, so here I am asking for advice. How do I fix this? Because I don't want to have to keep replacing the power supply every 10 minutes :tired:

 

[Cyparagon]

They're dying because you're overloading them. 4A is not nearly enough. Use a power supply that can easily handle the current of your circuit.

 

[Mattronium]

OK, thanks.
After I get back from SELEM I will try a better power supply like you say.

 

[autonomousperson]

Also switching power supplies dont work well with a flyback transformer. I normally power it on batteries (11.1v lipos) or a 12v SLAB. If you want it to be mains powered then use a non switching power supply (the big brick ones with a big transformer).