![]() ![]() The difference between AC and DC is the reason your laptop has a bulky external power supply between itself and the wall outlet. DC travels in only one direction within a circuit, plots as a straight line, and provides constant voltage and current to most electronic circuits such as the PCBs you design. AC switches direction within a circuit, plots as a waveform (often sinusoidal) when measured with an oscilloscope, and is used to power most buildings and homes. DC power is an important piece of power electronics. Remember how there are two types of current: alternating current (AC) and direct current (DC)? But the definition of what a power supply is doesn’t really do justice to what it’s usually doing in a circuit. What is a power supply?Ī power supply is simply any device that provides power to a circuit. In this post we’re going to cover the basics of power supply design, schematic capture, and circuit simulation. Different circuits will have different power demands, so mastering the fundamentals of power electronics is a key path on the road to becoming a designer. From robots to electric vehicles to data centers and IoT devices-the one thing every circuit has in common is the need for a power supply. ![]()
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