While prototyping your new project, you might want to know how much power your designed circuit will draw from the source voltage. One way to find it is to connect an ammeter in series with the circuit and determine the current drawn from the source. Then, knowing the source voltage you can easily determine the power. But doing this may not be always convenient. This project describes a special power supply unit that has built-in features for measuring the source voltage and current. Therefore, you can monitor both the parameters continuously while experimenting your circuit.