For example when I apply 12V, and I measure the voltage at pin 2 (the minus of the LM393) I get 3.4V which is good. But when I measure the voltage at pin 3 (the plus input) I get 1.73V.
I measure all voltages with respect to ground.
The output voltage(pin 1) is close to zero which is good.
Another try: When I set VCC to 15V, pin 2 voltage is 3.52V, pin 3 is 2.15V, pin 1 is zero.
Are the calculations even correct? Need help