The “Negative Load” Problem Standard linear regulators, like the ubiquitous LM7805, are designed to be “sinks” of power. They take a higher voltage and drop it down, pushing current out of their output pin to power your circuit. However, they are effectively “one-way valves.” In a modern project—especially one involving motors, large inductors, or external
Beyond One-Way Power: Upgrading a Linear Regulator to a Two-Quadrant Linear Power Supply
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