Mosfet turn on turn off problem

[Arrowspace]

I'm trying to turn of my MOSFET using 555 and transistor but when I try to trun off it, I get 1 Volt at low state .

I posted my circuit diagram below

 

[barry]

It's not clear what the gate resistor is, it looks like 1.1K to me, but I'm not sure; in fact, I can't really read anything on that schematic. That 1.1K would be inexplicably large, but shouldn't cause a static problem. It's also not clear what "1 Volt at low state" means. You mean when the MOSFET is on? (Low). Or when the Gate voltage is low? I think we need more information. What is the MOSFET? What is gate voltage (you might need about 10V to drive it fully on, depending on the device)?. What is your timing?

 

[Arrowspace]

ya it 1.1k and IRF520N MOSFET

 

[barry]

ya it 1.1k and IRF520N MOSFET

And gate voltage? And pulse width? And power supply? And why 1.1K?