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I’m not sure if it’s working correctly but here’s how it should work in real life:
The capacitor gets charged up until it reaches the threshold voltage of the zener diode, and then it moves through a 10k potentiometer, which lets you adjust how fast it discharges, which is basically the pulse width. There’s another 10k potentiometer before the capacitor which lets you adjust how fast it charges up, so that should affect the frequency. The discharge of the capacitor opens the gate of the P channel mosfet, which is connected to the negative end on one leg and on the other it is connected to the positive end of the capacitor and the positive end of the voltage source. All the voltage from the voltage source moves through the mosfets drain and source, which pulls all the voltage away from the gate of the mosfet and all the other components leading up to it. The voltage moved to the positive end, but since the voltage was pulled away from the mosfet, it turns off. Now the capacitor starts charging up, and the cycle repeats.
By the way, I described this circuit using electron flow (negative to positive), mainly because I’m using a P Channel MOSFET, so it needs negative voltage to turn on.
Please comment if you know why it’s not oscillating in this simulation.
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