Difference between revisions of "Extension Explorer 16"

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(→‎Formula)
(→‎Formula)
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** average current : I = 30mA   
 
** average current : I = 30mA   
 
=== Formula ===
 
=== Formula ===
−
* calculation of resistance R_LED_R  
+
* calculation of resistance R_LED_R : 
−
\begin{equation}
+
<code>$\frac{U_r}{I} = \frac{VDD - U_{LR}}{I} = \frac{3.3V - 1.8V}{10mA} = ''' 150 ohm '''$</code>
−
<math>\frac{U_r}{I} = \frac{VDD - U_{LR}}{I} = \frac{3.3V - 1.8V}{10mA}</math>
+
* power dispersed by the resistance P_R_LED_R :
−
\end{equation}
+
<code>$<math>\frac{R_LED_R^{2}}{I} = \frac{150 o ^{2}}{10mA}</math> = ''' 15 mW ''' $</code>
−
 
+
−
= ''' 150 ohm '''
+
−
* power dispersed by the resistance R_LED_R <math>\frac{R_LED_R^{2}}{I} = \frac{150 o ^{2}}{10mA}</math> = ''' 15 mW '''  
+
 
    
 
    
−
* calculation of resistance R_LED_O <math>\frac{U_r}{I} = \frac{VDD - U_{LO}}{I} = \frac{3.3V - 1.9V}{10mA}</math> = ''' 140 ohm '''
+
* calculation of resistance R_LED_O :
−
* power dispersed by the resistance R_LED_O <math>\frac{R_LED_O^{2}}{I} = \frac{140 o ^{2}}{10mA}</math> = ''' 14 mW '''
+
<code>$<math>\frac{U_r}{I} = \frac{VDD - U_{LO}}{I} = \frac{3.3V - 1.9V}{10mA}</math> = ''' 140 ohm ''' $</code> 
 +
* power dispersed by the resistance P_R_LED_O : 
 +
<code>$<math>\frac{R_LED_O^{2}}{I} = \frac{140 o ^{2}}{10mA}</math> = ''' 14 mW ''' $</code> 
  
−
* calculation of resistance R_LED_G <math>\frac{U_r}{I} = \frac{VDD - U_{LG}}{I} = \frac{3.3V - 2.2V}{10mA}</math> = ''' 110 ohm '''
+
* calculation of resistance R_LED_G :
−
* power dispersed by the resistance R_LED_G <math>\frac{R_LED_G^{2}}{I} = \frac{110 o ^{2}}{10mA}</math> = ''' 11 mW '''
+
<code>$<math>\frac{U_r}{I} = \frac{VDD - U_{LG}}{I} = \frac{3.3V - 2.2V}{10mA}</math> = ''' 110 ohm '''$</code>
 +
* power dispersed by the resistance P_R_LED_G : 
 +
<code>$<math>\frac{R_LED_G^{2}}{I} = \frac{110 o ^{2}}{10mA}</math> = ''' 11 mW '''$</code>
  
 
= Layout =
 
= Layout =

Revision as of 01:27, 30 September 2014

Description

In French: Création d'une carte d'extension pour la carte Explorer (PROJET: Carte Explorer 16 & Exos sur les uC).

  • V1: un montage permettra de simuler un carrefour routier, composer de 4 feux (RGB)


in English: creation of one extansion board for the Explorer Board (see the links above)

  • V1: assembly will allow to simulate a crossroad (4 fires (RGB))

Digram - Schematic

Part Calculation of Electronics Digram

LED's for crossroad

  • the datasheet of the DSP implemented on the Explorer Board 16 (see pages 1 & 273) indicates that :
    • output current of I/O : I = 10mA
    • voltage I/O : VDD = 3.3V
  • the datasheet of the red LED (see pages 3) indicates that :
    • conduction voltage : ULR = VF = 1.8V
    • average current : I = 20mA
  • the datasheet of the orange LED (see pages 3 / 4 / 5) indicates that :
    • conduction voltage : ULO = VF = 1.9V
    • average current : I = 30mA
  • the datasheet of the green LED (see pages 3 / 4 / 5) indicates that :
    • conduction voltage : ULG = VF = 2.2V
    • average current : I = 30mA

Formula

  • calculation of resistance R_LED_R :

$\frac{U_r}{I} = \frac{VDD - U_{LR}}{I} = \frac{3.3V - 1.8V}{10mA} = 150 ohm $

  • power dispersed by the resistance P_R_LED_R :

$\frac{R_LED_R^{2}}{I} = \frac{150 o ^{2}}{10mA} = 15 mW $

  • calculation of resistance R_LED_O :

$\frac{U_r}{I} = \frac{VDD - U_{LO}}{I} = \frac{3.3V - 1.9V}{10mA} = 140 ohm $

  • power dispersed by the resistance P_R_LED_O :

$\frac{R_LED_O^{2}}{I} = \frac{140 o ^{2}}{10mA} = 14 mW $

  • calculation of resistance R_LED_G :

$\frac{U_r}{I} = \frac{VDD - U_{LG}}{I} = \frac{3.3V - 2.2V}{10mA} = 110 ohm $

  • power dispersed by the resistance P_R_LED_G :

$\frac{R_LED_G^{2}}{I} = \frac{110 o ^{2}}{10mA} = 11 mW $

Layout

Components listing

Modification

Documentation

PDF FILE

required links

Contributor

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