Within the streaming period, few of us take into consideration MP3s on a each day foundation anymore. Our music assortment is managed by warring executives in streaming corporations from far-off lands. Nonetheless, for [vinod]they’re nonetheless helpful — seeing as he simply constructed himself an MP3 participant that matches in a clay pot.
The construct relies on the FRDMK64F improvement board, packing a robust 120 MHz ARM chip. This has sufficient grunt to decode MP3s on the fly, utilizing the Helix MP3 decoder library. The MP3s themselves are streamed off an SD card, utilizing the sooner SDIO entry methodology reasonably than counting on slower SPI. As soon as decoded, the ensuing PCM audio information is shifted out by way of a DAC utilizing the chip’s DMA {hardware}, permitting for clean, glitch-free playback. Output to an enormous woofer is by way of a 15 W class D amplifier, with the entire rig powered from a USB powerbank.
With all of the electronics piled on the again of an enormous woofer speaker with lashings of sizzling glue, the ultimate result’s fairly imposing; all of the extra so when put in neatly inside a clay pot appearing as a bass reflex enclosure. We’ve seen some concrete forged audio system earlier than, however not practically sufficient hacker tasks in clay. Please rectify this, and inform us when you’ve performed so. Thanks upfront — video after the break!
