In this video, we want to test the Reducer Power Consumption (RPC) with single output port. Input power supply is DC type. For measuring the current, a one ohm resistor is used. In this case, the current is approximately equal to the voltage across the resistor. First, the supply voltage and current is measured. The supply voltage and current are about 2.73 volt and 0.32 ampere respectively. As a result, the input power is approximately equal to the 0.87 watt. Now, a lamp is connected to the output. In this case, Supply current and voltage are about 0.31 ampere and 2.67 volt due to the feedback in circuit. In this mode, Power consumption is approximately equal to 0.82 watt. It can be seen that by connecting the load to the output, power consumption is not increased and even slightly reduced.