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Asked — Edited

Alternative Mp3 Trigger Sound Modules

I started testing some alternative MP3 Sound Modules, my goal to get similar functions but at 50% less than the cost of MP3 Trigger ($50 + s/h). This could help people with low budget that want to get into robotics or just wanted to build a low cost robot. I choose these two modules in theory from reading their data sheet should work with EZ-B thru very simple sendserial command already built into EZ-Builder:

This MP3 module im testing and is working very well with EZ-B, it supports 40 MP3 files, 6 outputs:

40MP3 Module

Specification

This MP3 module supports 199 MP3 files and 8 outputs but I can't get it to work because it required baud rate of 4800 which EZ-Builder doesn't support but i would like to have it working because it supports 199 MP3 files and have better features than the above module:

199MP3 Module

Specification

However both modules needs an audio amplifier but for the price you can't beat for small to large robot projects that don't need a lot of sound files.

I have already got it working well with my Wall-E project, there is just one problem because the volume reset once power is disconnected so i found a way around that by using a init script at connection to change to max volume and a start up sound. All costs less than half price of MP3 Trigger:).

Here is a rough wired pic using Wall-E own speaker, MP3 module, and a dual 3W amplifier. I will post more details soon but still i would like to be able to use the 199 mp3 module, nice thing is both module output stereo sound and you are not limited to small speakers, just use bigger amp for bigger speakers and blue color matching EZ-B board:)

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More details on wiring and custom scripting coming soon...might make a demo video if i have some free time.

#79  
is there a link where you purchase the op-amp kit? Thanks.
#82  
Hi All, I've installed this setup (The 40MP3 Module) and initially it worked fine. In fact, when I power up the EZB, the sound card plays the first sound file. However, although using the example script (and consequently, my scripts) I was able to control the board, not however, I can no longer control it (with mine or the example scripts.). There is no change to the indicators on the sound card; fast flashing blue, constant red.

HELP!

Seems I'm going backwards, rather than forwards : (
#83  
OK, can't find my original post about yet another alternate MP3 player from MDFly.

Just installed the AU5032 TF CARD MP3 PLAYER MODULE. Linky


The data sheet says it needs a Logic level TTL voltage converter: Linky

However, this converter seems to be just that, the logic signal and voltage. The "power" to activate the MP3 card requires that you feed another 3.3v source into the line:

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So I wired it all up, and it works fine (although you will still need an amp.)

Any ideas on how to power this thing without an external supply?