I've tried this circuit for example.
In the end I will use the circuit to drive a laser-module with the use of a transistor.
Like a sort of "gun". So each time you pull the trigger it will give a relative long pulse and you need to retrigger for the next pulse.
The thing with the circuit above is that the laser stays ON as long as you push the button.
I'd like to adust the pulse length from around 50ms-800ms (just long enough to see where you were pointing).
Thanks for your drawing. I will simulate it.