What is a bench power supply?
A bench power supply provides DC (direct current) voltage to power a device under test such as a circuit board or electronic product. A bench or lab power supply typically sits on an engineer’s work area or bench, hence the term “bench power supply”.
How do you measure power supply current with a multimeter?
Test Procedure Set the input voltage to the nominal requirement for your power supply. Set the output voltage load to its maximum rated value. Measure the output voltage (VOUT) with the calibrated voltmeter. Note that DC/DC power supplies typically have a set output voltage where AC/DC have a variable output voltage.
How does a variable voltage power supply work?
The setting up action for this High End Bench Power Supply with Variable Voltage/Current is dependent totally with the current limit feature. 1. With the device powered down, adjust the output voltage control, P1, to get zero volts, the current control pot, P2, for optimum current (maximum resistance), and Pt to zero resistance.
Can a Work Bench power supply be adjusted?
The post explains a schematic design of a versatile, Hi-End work bench power supply whose output voltage and output current can be independently adjusted very finely, with high accuracy and stability. The circuit diagram of the single-channel power unit is presented in following figure.
How does the current limit on a power supply work?
Current limiting depending on the feedback voltage is accomplished through R19, IC2, T9 T10 and T6. The current flow by means of R19 generates a voltage drop across the resistor. Portion of this voltage is determined by resistive divider P2 and R20, amplified by IC2 and fed to a trigger circuit built around T8 and T9.
What kind of voltage do I need for my workbench?
One of the essential pieces of equipment for any electronics workbench is a power supply. A source of regulated DC voltage is something that every experimenter needs. The most common voltages used by digital electronics are 5-volts, 3.3-volts, and 12-volts.