How can I reduce the output voltage of a zener diode?
My main goal here is to get an LED to light up when it "detects" over 30V, regardless of the specific output of the voltage source.
I attached here an image of the circuit that I currently have. The output of the zener diode is about 30V. What I want to do now is reduce this output to 2V in order to light up an LED that has a 1.8-2.2 VDC forward drop and a max current of 20mA.
I was thinking of attaching a voltage divider to this circuit in order to lower the 30V to 2V, but I'm not sure how, especially with the zener diode involved.
Can anyone help me?