Difference between revisions of "Extension Explorer 16"
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* the datasheet of the red LED (see pages 3) indicates that : | * the datasheet of the red LED (see pages 3) indicates that : | ||
| − | ** conduction voltage : VF = 1.8V | + | ** conduction voltage : ULR = VF = 1.8V |
** average current : I = 20mA | ** average current : I = 20mA | ||
| − | * the datasheet of the orange LED (see pages 4 | + | * the datasheet of the orange LED (see pages 3 / 4 / 5) indicates that : |
| − | ** conduction voltage : VF = 1.9V | + | ** conduction voltage : ULO = VF = 1.9V |
** average current : I = 30mA | ** 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 === | === Formula === | ||
* calculation of resistance R_LED_R <math>\frac{U_r}{I} = \frac{VDD - U_{LR}}{I} = \frac{3.3V - 1.8V}{10mA}</math> = ''' 150 ohm ''' | * calculation of resistance R_LED_R <math>\frac{U_r}{I} = \frac{VDD - U_{LR}}{I} = \frac{3.3V - 1.8V}{10mA}</math> = ''' 150 ohm ''' | ||
| − | * power dispersed by the resistance R_LED_R <math>\frac{R_LED_R}{I} = \frac{150 o}{10mA}</math> = ''' 15 mW ''' | + | * 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_{ | + | * 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 ''' |
| − | * power dispersed by the resistance R_LED_O <math>\frac{R_LED_O}{I} = \frac{140 o}{10mA}</math> = ''' 14 mW ''' | + | * power dispersed by the resistance R_LED_O <math>\frac{R_LED_O^{2}}{I} = \frac{140 o ^{2}}{10mA}</math> = ''' 14 mW ''' |
| + | |||
| + | * 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 ''' | ||
| + | * power dispersed by the resistance R_LED_O <math>\frac{R_LED_O^{2}}{I} = \frac{110 o ^{2}}{10mA}</math> = ''' 11 mW ''' | ||
= Layout = | = Layout = | ||
Revision as of 01:01, 30 September 2014
Contents
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
= 150 ohm - power dispersed by the resistance R_LED_R
= 15 mW
- calculation of resistance R_LED_O
= 140 ohm - power dispersed by the resistance R_LED_O
= 14 mW
- calculation of resistance R_LED_G
= 110 ohm - power dispersed by the resistance R_LED_O
= 11 mW
Layout
Components listing
Modification
Documentation
PDF FILE
- datasheet on the RED LED - AVAGO File:LED RED.pdf
