I'm trying to create a delay circuit like this. When I snapp on the push button, then the current flows from +3.3V to GND and bypass the 220 Ohm resistor, which is my load.
But the problem here is that I want to have this current peaks like a square wave, PWM etc, not this slow slope.
What should I replace so this MOSFET got its voltage gate dropped to 0V when the gate voltag is under a certain threshold?
I will NOT use a mechanical relay and optocoupler will not work neither.
Digital circuits will work too. But I'm not expert at them.