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An inductor, which stores energy, limits the current slew rate through a power switch. The energy stored in the inductor can be expressed in joules as a function of the current with: E = 1/2 X L X I2
A current limiting resistor regulates and reduces the current in a circuit. This equation and calculator helps determine the value of the resistor to add to a light-emitting diode (LED) so that it can limit the current moving through the…
Voltage is energy per unit charge. Current is the rate of electric charges moving through a conductor. Electrical power is the product of voltage and current.
The LM317 needs two external resistors — R1 and R2 — to adjust the output voltage. The output voltage depends on the values of R1 and R2.
Create the perfectly lit tree this holiday season with our Christmas-tree-light calculator. Calculations within.