Changes

==== Resistor in end line for horizontal sgement ====

if the segment is alone, the end line resistor is of (example each element of the M letter) :

<math>

R_{1LED} = \frac{Vcc - U_{seg_{LED}}}{I_{LED}} = \frac{12V - 2V}{20mA}

Power dissipated by the resistor R_LED:

<math>

P_{R_{1LED}} = R_{1LED} \cdot I_{Led}^2 = 500 \cdot (20mA)^2

if the segments are linked by two, the end line resistor is of (example for the F letter) :

<math>

R_{LEDs} = \frac{Vcc - U_{LED}}{I_{LED1} + I_{LED2}} = \frac{12V - 2V}{20mA + 20mA}

Power dissipated by the resistor RLED_2:

<math>

P_{R_{LEDs}} = R_{LEDs} \cdot (2*I_{Led})^2 = 250 \cdot (40mA)^2

if the segments are linked by three, the end line resistor is of (example for the E letter) :

<math>

R_{LEDs} = \frac{Vcc - U_{LED}}{I_{LED1} + I_{LED2} + I_{LED3}} = \frac{12V - 2V}{20mA + 20mA +20mA}

Power dissipated by the resistor RLED_3:

<math>

P_{R_{LEDs}} = R_{LEDs} \cdot (3*I_{Led})^2 = 250 \cdot (60mA)^2