Changes

==== Resistor in end line for vertical sgement ====

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

<math>

R_{1Seg} = \frac{Vcc - U_{seg}}{I_{LED}} = \frac{12V - 10V}{20mA}

Power dissipated by the resistor Rseg:

<math>

P_{R_{1Seg}} = R_{1Seg} \cdot I_{Led}^2 = 100 \cdot (20mA)^2

if the segments are linked by two, the end line resistor is of (example for the F, I, M, E letters) :

<math>

R_{1Seg} = \frac{Vcc - U_{seg}}{I_{LED_{Seg1}} + I_{LED_{Seg2}}} = \frac{12V - 10V}{20mA + 20mA}

Power dissipated by the resistor Rseg:

<math>

P_{R_{1Seg}} = R_{1Seg} \cdot (2*I_{Led})^2 = 100 \cdot (40mA)^2