Symmetrical Power Supply LM317/337 Variable


Symmetrical Power Supply LM317/337 Variable is circuit symmetrical power supply with output voltage output that can be set (adjustment). Circuit of symmetrical power supply LM317/337 variable uses  variable DC regulator LM317 to regulator positive and negative voltage regulator LM37 variable for negative voltage regulator. Symmetrical Power Supply series LM317/337 Variables can be used to provide the source voltage with maximum current 1A.

In the application field can be mounted voltmeters at each point its output to ease in setting the output voltage level circuit Symmetrical Variable Power Supply LM317/337 this.



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Circuit  of symmetrical power supply  LM317/337 variable using input source voltage of 18V AC 18V CT transformer CT. To set a positive voltage level can be done by adjusting the potentiometer 25K at the LM317 regulator and to regulate the negative voltage level carried out by adjusting the potentiometer 25K at the LM337 negative voltage regulator.