I have two MOSFET circuits; one is working and the other fails and I'm not sure why. I just want to turn on/off the LED, nothing special, no fast switching.
Below is the working circuit (series gate resistor):
Below is the non-working circuit. By non-working I mean when I apply a '0' to the gate, there is 2V sitting on the gate and the LED dimly comes on. Why is this happening?
I understand that a MOSFET has high gate impedance and a gate resistor is not a necessity but I wouldn't expect the MOSFET to completely not work right. Am I missing something?