electricpy.led_resistor

electricpy.led_resistor(Vsrc, Vfwd=2, Ifwd=20)[source]

LED Resistor Calculator.

This function will evaluate the necessary resistance value for a simple LED circuit with a voltage source, resistor, and LED.

\[R_\text{LED} = \frac{V_\text{SRC} - V_\text{FWD}}{I_\text{FWD}}\]
Parameters:

  • Vsrc (float) – Source voltage, as measured across both LED and resistor in circuit.

  • Vfwd (float, optional) – Forward voltage of LED (or series LEDs if available), default=2

  • Ifwd (float, optional) – Forward current of LEDs in milliamps, default=20 (milliamps)

Returns:

R – The resistance value most appropriate for the LED circuit.

Return type:

float