i m designing a circuit whose output should be a rectangular peak of 10% duty cycle, 80-100 Hz frequency, 70-120V peak voltage and 70-120mA current. i have used the attached circuit which is giving the required duty cycle and voltage and frequency which can be varied. but the problem is that the ammeter is not giving the current readings.. its just keep showing 0.0001uA. please guide me for this matter
