Hi, I have been trying to build an mp3 player project i saw on avrfreaks, but the guy who designed it used a vs1003b mp3 decoder. I cant start to explain how hard it is to get one that the home hobbyist can solder, there was a guy in europe but he shut down.
anyway, i see sparkfun have the vs1002 breakout board, and was wondering if someone could help me distinuish whether they are interchangeable. I am getting my head roud datasheets but this is slightly more than i can handle right now
Thanks denial. I am reasonably new to mp3, but my project is almost there, this chip is my only hold back, and I did buy the 1003 from the vlsi website, but hadnt really understood how small it was. Its pins are also right underneath - 49 of them in a space 5mm x 5mm. Soldering wis impossible.
So before I order, this board is basically an easier way of accessing the pins on the chip, I can put it on a breadboard, and wire it up instead of having to surface mount something the size of my finger nail? What all the other surface mount components doing on the breakout board?
I’m not too worried if this chip can only play mp3, its a start into my world of electronics!
the only other difference then is i can run it off a 3.3v power supply instead of needing a 2.5v one as well…?
a.mlw.walker:
Its pins are also right underneath - 49 of them in a space 5mm x 5mm. Soldering wis impossible.
So you’ve bought the BGA version. You should have bought VS1003B-L instead of VS1003B-B from their shop. The LQFP version is not bigger but the pins stick out from the sides. The [tutorials section explains some advanced soldering techniques that you could try to solder your BGA chip (if you can find someone to make the required multi-layer PCB with all its vias under the chip).
What all the other surface mount components doing on the breakout board?
the schematic shows input to 3.3v power supply to be called VCC. I already have power supply to be 3.3volts for my microcontroller, coming rom a 9volt battery. what should the voltage of the power supply going to the breakout board be, can it be my 9v battery, or not?
First of all, I’m not sure if the vs1002 and vs1003 are completely interchangeable, but the vs1002 can play mp3 and many other music formats, as well as record audio files.
The breakout board is intended to give easy access to the pins, and if you are so inclined you could easily put it onto another circuit board by including a .1" header on your board with the proper pinout.
The surface mount components on the breakout board serve a plethora of purposes in order to make the board virtually “plug and play.” There is a high pass filter on the audio outs, pull-down resistors on the GPIO pins, some on-board voltage regulators for the power supply and some decoupling capacitors, as well as the crystal oscillator. These are included so that all you have to do is provide power (yes, your 9V source will work) and the communication lines and you can be up and running. You don’t have to worry about the supporting hardware for the MP3 player at all.
Hopefully this will get you started. Good luck with your MP3 player!
