Difference between revisions of "Extension Explorer 16"
From Fixme.ch
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* calculation of resistance R_LED_R : | * calculation of resistance R_LED_R : | ||
<math> | <math> | ||
| − | R_{LED_R}=\frac{U_r}{I}=\frac{ | + | R_{LED_R}=\frac{U_r}{I}=\frac{V_{DD}-U_{LR}}{I}=\frac{3.3V-1.8V}{10mA} |
</math> | </math> | ||
= ''' 150 ohm ''' | = ''' 150 ohm ''' | ||
* power dispersed by the resistance P_R_LED_R : | * power dispersed by the resistance P_R_LED_R : | ||
<math> | <math> | ||
| − | \frac{R_{LED_R}^2}{I}=\frac{150^{2}}{10mA} | + | P_{R_{LED}_R}=\frac{R_{LED_R}^2}{I}=\frac{150^{2}}{10mA} |
</math> | </math> | ||
= ''' 15 mW ''' | = ''' 15 mW ''' | ||
* calculation of resistance R_LED_O : | * calculation of resistance R_LED_O : | ||
| − | <math>\frac{U_r}{I}=\frac{ | + | <math> |
| − | </math> = ''' 140 ohm ''' | + | R_{LED_O}=\frac{U_r}{I}=\frac{V_{DD}-U_{LO}}{I}=\frac{3.3V-1.9V}{10mA} |
| + | </math> | ||
| + | = ''' 140 ohm ''' | ||
* power dispersed by the resistance P_R_LED_O : | * power dispersed by the resistance P_R_LED_O : | ||
| − | <math>\frac{R_LED_O^{2}}{I}=\frac{140^{2}}{10mA} | + | <math> |
| + | P_{R_{LED}_O}=\frac{R_LED_O^{2}}{I}=\frac{140^{2}}{10mA} | ||
</math> | </math> | ||
= ''' 14 mW ''' | = ''' 14 mW ''' | ||
* calculation of resistance R_LED_G : | * calculation of resistance R_LED_G : | ||
| − | <math>\frac{U_r}{I}=\frac{VDD - U_{LG}}{I}=\frac{3.3V-2.2V}{10mA}</math> | + | <math> |
| + | R_{LED_G}=\frac{U_r}{I}=\frac{VDD - U_{LG}}{I}=\frac{3.3V-2.2V}{10mA} | ||
| + | </math> | ||
= ''' 110 ohm ''' | = ''' 110 ohm ''' | ||
* power dispersed by the resistance P_R_LED_G : | * power dispersed by the resistance P_R_LED_G : | ||
| − | <math>\frac{R_LED_G^{2}}{I}=\frac{110^{2}}{10mA} | + | <math> |
| − | </math> = ''' 11 mW ''' | + | P_{R_{LED}_O}=\frac{R_LED_G^{2}}{I}=\frac{110^{2}}{10mA} |
| + | </math> | ||
| + | = ''' 11 mW ''' | ||
= Layout = | = Layout = | ||
Revision as of 22:44, 8 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 :
= 150 ohm
- power dispersed by the resistance P_R_LED_R :
Failed to parse (PNG conversion failed; check for correct installation of latex and dvipng (or dvips + gs + convert)):
= 15 mW
- calculation of resistance R_LED_O :
= 140 ohm
- power dispersed by the resistance P_R_LED_O :
Failed to parse (PNG conversion failed; check for correct installation of latex and dvipng (or dvips + gs + convert)):
= 14 mW
- calculation of resistance R_LED_G :
= 110 ohm
- power dispersed by the resistance P_R_LED_G :
Failed to parse (PNG conversion failed; check for correct installation of latex and dvipng (or dvips + gs + convert)):
= 11 mW
Layout
Components listing
Modification
Documentation
PDF FILE
- datasheet on the RED LED - AVAGO File:LED RED.pdf
