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