This circuit takes a variable input voltage and produces a stable voltage regardless of the current required by the load. The Zener diode provides a reference voltage, holding the op-amp's positive input at approximately 6 V above ground. The op-amp produces whatever voltage is needed to keep the - input at 6 V; the voltage divider ensures that the output voltage is 2 times the input voltage, or 12 V. You can adjust the sliders on the right to change the input current or load current; the 12 V output voltage should not change.
This page is a utility for simulating регулятор напряжения online with specified initial values.










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