Very nice. I like the ease of programming. But don't you think it's too pricy? I mean there's the Arduino MP3 Shield (micro4you.com is for sale | HugeDomains).
This costs only 30 dollars, almost 50 dollars less than the rMP3....
Very nice. I like the ease of programming. But don't you think it's too pricy? I mean there's the Arduino MP3 Shield (micro4you.com is for sale | HugeDomains).
This costs only 30 dollars, almost 50 dollars less than the rMP3....
DeadEye - Same issue as Sannin (I guess he/she didn't want a free rMP3).
That board is just an MP3 decoder + SD card socket. It doesn't do anything. You still need a controller.
So, $30 for that board, plus $30 for an official Arduino, and you're at $60. Then you will have to do the interface between the SD card and the MP3 decoder - tying up the Arduino which could be doing a lot of other things.
I'm definitely not putting down that product. It's great if you want to learn how to use SD cards and the MP3 decoder. Go nuts if that's what you want.
The rMP3 can run on it's own, or can be controlled by an Arduino (or another microcontroller) with very little interaction.
Bottom line:
You'll need more than just that $30 board to get MP3's playing. And you may not have much space/time left on your Arduino for anything else.
b
Oh, sorry didn't notice that. If that's the case then I'm definitely buying this one over the MP3 Shield. Seriously, though, I thought the MP3 Shield didn't need any other parts. If what you say is true then it seems the rMP3 is way better.
Thanks for the explanation.
Can you tell me what are the differences between the uMP3 and rMP3?
The uMP3 has been around since 2003 and is tried, tested and true. It's original design was intended for OEM integration. It uses the ATmega32 controller running at 7.3728 MHz.
The rMP3 can also be used for OEM integration, but is also an Arduino compatible shield. The controller (ATmega644P) is running at 2.5x the speed of the uMP3, enabling more processing in the same amount of time. The larger flash size on the controller also provides more space for firmware improvements.
They both have the same base function set (playback controls, external triggering, config on card (COC), file access, etc). You will see more improvements on the rMP3 versus the uMP3 because of the flash constraints.
You can use either with an Arduino (libraries work with both), but the rMP3 can piggy-back directly onto an Arduino:
Have you considered providing a simpler way to reroute the jumpers on the rMP3? I had a tough time soldering new wires to the jumper pads with my 2.3 mill soldering iron, and would have loved to have simply been able to move a jumper sock, instead... This might not be the best solution, but there must be other methods for providing for this?
I had. The problem becomes: how does one reroute signals? Do I provide a couple of options? There currently are no standards for what pins are used by what shields (considering the vast amount of shields around, it might be worth making a list of pins used by them all).
Another shield I had considered making was what I called a "SwitchBoard" (i.e. like the old style telephone switchboards). You simply use wires to reroute signals (it's all flush or below the female headers). But I figured that not many people would use it.
I chose to put down some pads. Unfortunately, I used 0603 pads. A bit small to work with. Sorry about that!
The next hardware version will have something easier for rerouting the signals.
Out of curiosity, what pins did you reroute to and why?
b
I rerouted to 3 and 4, simply because 5 and 6 are used by my LED Keypad shield, which I need for my Jukebox project. When I first looked at rerouting, I was hoping to use the little holes that lead to the pads, by threading a simple tinned wire through each. However, those holes are too small, too... It could have been a nice option, though.
Geez. I forgot you posted that earlier.
I was thinking of maybe just using some standard holes in place of the pads next time.
Have you got a blog/page for your jukebox? It would be great to see.
b
Not yet, my site is down, but I do plan on posting a start to finish mini site. I'll be sure to send you a link when it's up. Maybe you could use it as a case study?
That would be great! Thanks! Let me know if you need any help with coding - I'd love to help.
b
considering the vast amount of shields around, it might be worth making a list of pins used by them all
I agree with this but obviously not the easiest thing to do.
The idea thing would be an interactive list where you can add shields to see which pins are the same and which of the pins on those shields are re-routable (if any).
Anyone want to help take on this challenge?
Mowcius
Er, no.
haha, thanks! ;D
Well, I started a playground page to start documenting the pins used:
http://www.arduino.cc/playground/Main/ShieldPinUsage
(see http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1273208396)
b
Ok. Nice. I will see what I can help with later.
Mowcius
I read all the replies to this post and the site details but am still not sure about 2 things.
I was reading a post about this being able to break out frequencies to over 20 bands, any details on that?
Can the rMP3 read music directly via an input jack or does this only work with mp3 files loaded on the SD Card?
I was reading a post about this being able to break out frequencies to max 23 bands, any details on that?
It's still in beta. It can be done and brett will link you to the code if you want it. As far as I know, the beta is being released soon with more examples as to how to do this and other things.
Can the rMP3 read music directly via an input jack or does this only work with mp3 files loaded on the SD Card?
It doesn't have an input jack but as it plays its own music I'm not sure why you'd want to input music to it.
Mowcius
... I'm not sure why you'd want to input music to it.
I want to make something anyone can come plug their own mp3 player (or any device or microphone) and have it split the bands to dance and/or show a simple EQ.
The EQ chip from blip does 7 bands and that is good enough for most needs, but wanted to see if this device could provide more details. It can, but not for my specific case of needing audio input. I realize this product is not made for that purpose and it may pull those details from the mp3 file, so I can see how it would not fit my current need .. but wanted to ask to be sure.
Thanks for the details.
I want to make something anyone can come plug their own mp3 player (or any device or microphone) and have it split the bands to dance and/or show a simple EQ.
The EQ chip from blip does 7 bands and that is good enough for most needs, but wanted to see if this device could provide more details. It can, but not for my specific case of needing audio input. I realize this product is not made for that purpose and it may pull those details from the mp3 file, so I can see how it would not fit my current need .. but wanted to ask to be sure.
Thanks for the details.
No problem. It does not sound like it is suitable for your purpose.
Mowcius