Modifications

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[[Fichier:ADF-WaveShield-Presentation.jpg|left|Détail des éléments]]

[[Fichier:ADF-WaveShield-Presentation.jpg|Détail des éléments]]

1 a

1. Bouton du volume (avec marche/arrêt)

2 b

 

3 c

2. Joue de fichiers wav décompressés depuis une carte SD

4 d

 

5 e

3. Prise jack stéréo de 3.5mm (déconnecte le haut parleur)

6 f

 

4. Raccordement de petit haut parleur (jusque 1/8w, 8Ohms)

 

5. Filtre analogique

 

6. DAC 12 bits (Convertisseur Digital vers Analogique)

   

   

Adding quality audio to an electronic project is surprisingly difficult. People tend to end up either using low-quality ISD chips (you might get 8Khz sampling rate for 30seconds out of these, if you're lucky!) or mucking around with trying to control a CD or MP3 player. Although it's possible to generate audio direct from a microcontroller using a PWM output, the quality is often low and its hard to fit a lot of music in an EEPROM chip. You can buy an embedded MP3 player board, but they're either expensive or difficult to use!

Adding quality audio to an electronic project is surprisingly difficult. People tend to end up either using low-quality ISD chips (you might get 8Khz sampling rate for 30seconds out of these, if you're lucky!) or mucking around with trying to control a CD or MP3 player. Although it's possible to generate audio direct from a microcontroller using a PWM output, the quality is often low and its hard to fit a lot of music in an EEPROM chip. You can buy an embedded MP3 player board, but they're either expensive or difficult to use!