For a square-wave supply, real power (P) is expressed as P=P1+P3+P5+… Also, there has to be both voltage and current at each component in order for there to be real power. The in-phase components of ...

Connecting the existing power supply to his oscilloscope, [Matthew] found the stock “steady on” setting was a 72 VAC peak-to-peak square wave at about ... for the current holiday season ...

The current is limited to about 5 milliamps ... For proper operation, the input must be a square wave with 50 percent duty cycle. A pulse with something other than a 50 percent duty cycle can be used ...

Figure 1 Circuit for an ultra-fast one-shot is forced by negative feedback to produce a 50% duty cycle square wave output. The charging current to C4 is supplied by Q1 and the associated components.