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LM2576 simple lab power supply electronic project
A simple lab power supply electronic project can be designed using this circuit diagram which is based on the LM2576 monolithic integrated regulator that provide all the active functions for a step-down (buck) switching regulator .
This simple lab power supply circuit diagram is designed to provide an variable output voltage between 1.2 to 35 volts at a maximum current of 3A .
As you can see in the schematic circuit this LM2576 power supply require few external electronic components and an input unregulated dc voltage of about 40 volts.
Electronic Circuits:
Circuit Diagram:

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Comments
25~1.5V from 32V
Amp rating of the inductors
the amperage is better to be