Mp3 to audio - Page 1
Forum section: electronics / beginners

author: upsidedownorangejuice
author_rank: Contributor
timestamp: June 16, 2013, 12:07:14 am
content: Hey want a really simple solution to do this obviously battery operated and maybe need to be able to be made water proof and rugged yes im aware there is perfectly good mp3 players out there ipods but i want to be able to just take any different usb or sd card input and then have audio outand obviously need skip forwards skip back, volume (that easy) and play pause (guessing button and first press is play second press is pause )ill be using it maybe in my amp im going to be building or as something else im working on.Thanksthat stupid orange

author: 4to20Milliamps
author_rank: Regular Contributor
timestamp: June 16, 2013, 04:26:35 am
content: Ok I'll bite, it doesn't make much sense to build one since you can buy them from ebay for less than the batteries cost, but if you really want to build something......it doesn't get much simpler than this:http://www.teuthis.com/html/mmc_mp3.htmlhttp://www.opencircuits.com/Music_Player#.22The_Super-Simple_pocket_size_mp3_player.22If you were hoping that you could just use a usb connector and a few resistors.......well unfortunately you need a few more parts.Have fun building it though.

author: Paul Price
author_rank: Super Contributor
timestamp: June 16, 2013, 04:28:44 am
content: It takes a lotta electronics to go from USB memory stick to headphones playing MP3.I built a MCU kitchen timer for my girlfriend and wanted to create interesting alarm tones. I found on sale at the local Walmart a small off-brand tiny MP3 player for about 20 bucks. I took it apart and brought out insulated wires from the control switches and used opto isolators to control these switches from my MCU. I could still plug it into my PC to download a bunch of tunes and some special effects and my MCU timer switched it on/off the regulated power to it from the li-ion battery in the timer.Trying to build a USB file mp3 player yourself would fill up a kitchen table with breakboards and would take a good year's work.

author: mariush
author_rank: Super Contributor
timestamp: June 16, 2013, 04:45:43 am
content: There are chips like STA013(B,T)http://www.digikey.com/product-detail/en/STA013$013TR/497-3939-2-ND/715857 that take a serial stream (mp3 data) and output pcm audio that you can then send to a DAC or a sound card chip.Or there's fully integrated chips like BU9458KVhttp://www.digikey.com/product-detail/en/BU9458KV-E2/BU9458KV-E2DKR-ND/2295854which have usb host, decoder, dac etc all but the kitchen sink.But I agree with Paul Price, it's much, much cheaper to just buy a retail mp3 player and just hack it...

author: upsidedownorangejuice
author_rank: Contributor
timestamp: June 16, 2013, 06:33:54 am
content: yea a board is what im looking for thanks every one that has replied so farThanksstupid orange

author: amyk
author_rank: Super Contributor
timestamp: June 16, 2013, 09:06:03 am
content: Those chips are ridiculously overpriced.http://dx.com/p/usb-rechargeable-screen-free-mp3-player-w-3-5mm-audio-jack-tf-slot-black-102154http://dx.com/p/m-328-mp3-player-mode-w-usb-sd-slot-silver-dc-3-7v-163934http://dx.com/p/1-0-lcd-car-mp3-player-fm-transmitter-with-remote-controller-sd-usb-host-dc-12-24v-65343http://dx.com/p/rechargeable-clip-on-screen-free-mp3-player-w-tf-slot-3-5mm-jack-black-110124http://dx.com/p/mp3-hardware-decoder-w-fm-remote-controller-usb-mini-usb-sd-slot-black-5v-126120http://dx.com/p/mp3-player-module-w-micro-sd-card-slot-mini-usb-3-5mm-jack-156001These appear to be based off theMVsiliconAU68xx/78xx SoCs, which are basically all-in-one. They costless than $1... I haven't seen anything about firmware and the datasheet mentions 32K of OTP so maybe you can get them pre-programmed and ready to use.

author: ivan747
author_rank: Super Contributor
timestamp: June 17, 2013, 03:24:42 am
content: I would go for amyk's solution but here's another alternative in the form of an Arduino shield.This is complete with working examples:https://www.sparkfun.com/products/10628This could be the most flexible and elegant solution.Here's a simpler solution. I think could be the most suited for your job. You ask for traditional playback buttons but maybe that's not what you really need. Take a look at this:https://www.sparkfun.com/products/11029It can play 18 tracks loaded in the SD card when activating one of the 18 lines connecting to it. I think you may be trying to make some sort of guitar pedal to connect to your amp, because you need ruggedness. Maybe it's not a guitar amp.-Ivan