The circuit does work but it's not accomplishing what I am trying to accomplish and I am not sure why. The circuit is suppose to simulate and oxygen sensor on a vehicle which pulses signal to the vehicles ECU. The LED is blinking, sorry for the confusion. Like I said in the post before this, I am wondering if it has to do with the stretch of wire I am trying to send such small voltage through.
EDIT:
Never mind for some reason my last post isn't showing up. I have about a 5 ft run of wire for the signal to get from the circuit to my vehicles ECU. On the plans that I originally got off the internet, this guy has it hook up directly to his vehicles ECU. His works and mine doesn't.... So, I'm not sure how much that 0.9v would drop on a 5 ft wire run and if there would even be any signal left.