From my understanding, Dc-Dc switching means turning something between 0 and some Dc voltage value. In doing that fast enough we obtain an equivalent Dc voltage value (pwm principle).
When talking about capacitor impedance, the relations is:
In example in the image below, if we imagine that the voltage source is switching DC power source, instead of a sinus, that gives a signal as one on the image below:
In that scenario, a current would never flow.
Doesn't that imply that the impedance of the capacitor is always infinite regardless of the frequency of switching?
If that is true, what does the suggestions not to do Buck-Boost circuits on breadboards?