Hi guys I am trying to implement galvanic isolation for my lm555 square wave generator. I am designing a marx generator so this is essential. I am new with transformers, at the moment all I want to get is the same square wave at the secondary side of the transformer but LTSpice doesn't even want to run it. Can anyone give me some advice? Am I missing any components? Cheers. Here is the circuit i am trying. The square wave is at around 8kHz
This is the output across the resistor after grounding the secondary side.