555 timer lower then 50 duty cycle

555 timer chip Lower then 50 duty cycle. Dip switch is for capacitor for frequency. The variable resistors adjust the frequency and duty cycle. By adding the diode you can reduce your duty cycle to 8% and by reducing the resistor 100 ohm. The duty cycle is 0.7% . we are trying to regulate voltage. It seems like mosfets can not be slowly opened to create a voltage drop because the voltage drop across the mosfets will be to high and the amp x the volts end up to be a high wattage.