Extension Explorer 16

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))

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

Documentation

PDF FILE

• datasheet on the RED LED - AVAGO File:LED RED.pdf