Difference between revisions of "Extension Explorer 16"
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=== Formula === | === Formula === | ||
* calculation of resistance R_LED_R : | * calculation of resistance R_LED_R : | ||
| − | < | + | |
| + | |||
| + | <math> | ||
| + | R_{LEDR} = \sum_{n=0}^\infty a_n x^n | ||
| + | </math> | ||
| + | |||
| + | |||
| + | <math> | ||
| + | \sum_{n=1}^{+\infty}\frac{1}{n^2}=\frac{\pi^2}{6}. | ||
| + | </math> | ||
| + | |||
| + | = \frac{U_r}{I} = \frac{VDD - U_{LR}}{I} = \frac{3.3V - 1.8V}{10mA} | ||
| + | |||
| + | <math>0</math> | ||
| + | |||
| + | = ''' 150 ohm ''' | ||
* power dispersed by the resistance P_R_LED_R : | * power dispersed by the resistance P_R_LED_R : | ||
<code>$<math>\frac{R_LED_R^{2}}{I} = \frac{150 o ^{2}}{10mA}</math> = ''' 15 mW ''' $</code> | <code>$<math>\frac{R_LED_R^{2}}{I} = \frac{150 o ^{2}}{10mA}</math> = ''' 15 mW ''' $</code> | ||
Revision as of 00:34, 7 October 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 :
= \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 :
$
= 15 mW $
- calculation of resistance R_LED_O :
$
= 140 ohm $
- power dispersed by the resistance P_R_LED_O :
$
= 14 mW $
- calculation of resistance R_LED_G :
$
= 110 ohm $
- power dispersed by the resistance P_R_LED_G :
$
= 11 mW $
Layout
Components listing
Modification
Documentation
PDF FILE
- datasheet on the RED LED - AVAGO File:LED RED.pdf
