This oscillator design appears the easiest and the most accessible to make for a beginner like me.

Another option is this oscillator design although this circuit has volt per octave pitch control which I wouldn’t need for my installation as I am thinking of having a fixed pitch for the oscillators I create and thus would have features I wouldn’t use meaning more time wasted on creating a more complicated oscillator for no reason.

Something else I would like to make is a VCA(voltage controlled amplifier). My idea is to control the amplitude of the oscillator using the sensors in the ultra sonic repeller circuit I was originally planning to circuit bend. The idea is to take out the component and place it to the VCA To control the amplitude. So when someone walks past the sensor and triggers an increase in voltage, the amplitude of the oscillator will also increase.