Louis T
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 ARC:
This MP3 module im testing and is working very well with EZ-B, it supports 40 MP3 files, 6 outputs:
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 ARC 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:
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
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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
More details on wiring and custom scripting coming soon...might make a demo video if i have some free time.
Actually i don't sell them, these are my spares ones i ordered just saving for projects but i don't need them now, i have 5 of them and bret.tallent wanted one so that leave me with 4 to spare. Just send me an email and let me know how many you need, i'll send an invoice over.
Thanks Man, just sent email. I also like your store! Added to my bookmarks. Lots of stuff I want......
@bret.tallent...I got it all packed and ready to go out today. Thanks for the compliment
really looking forward to see your order.
@Louis T - I have been playing with this set up on B9 and I really like it! Using a second Op-amp I am able to get my LED array to light up in sinc with the sound too. I had one question on you MP3 init files. Do you need both the INIT script and the VOL MAX script? It seems redundant because the scripts are identical after the (200) in the INIT file. Also, do you need the STOP MP3 script? Just curious.
Thanks,
Bret
Bret...That's awesome! That sounds interesting, could you post details on how you did that? I haven't work on this for a while but if i recall correctly, you only need the init file so it goes to Max volume at the start, the Vol Max script is just there as example, or if you need quick way to turn it to Max volume instead of running multiple Vol Up script. The same for Stop MP3 script, it's just an example, you don't need it unless you need to stop the track while it is playing in some situation.
Best robot building! Louis
Thanks! I used an op-amp kit in this pic Linky and took the R Out from the MP3Trigger into this and the output from this to my LED's. This way I can adjust the power to the LEDs via the op-amp and they light up with the output from the MP3. It works really well.
is there a link where you purchase the op-amp kit? Thanks.
Here is the link for the op amp kit