New kit! Wave shield for Arduino plays high quality audio
[flickr 2486494419 ]
I’m back from maker faire and am wrapping up the documentation for my latest fun toy. Its an Arduino shield that can play high quality audio, music and speech. One thing I’ve noticed in doing tronix for the last few years is how incredibly hard it is to have a project with audio in it. Audio takes up a lot of space, so you need a storage element, and our ears are sensitive to errors and noise so its tough to make it sound good. After mucking around with ISD chips, embedded MP3 boards, wiring to CD players, generating PWM sound, etc. I decided to investigate playing uncompressed Wave files from a memory card. Success!
Click on the play button to watch a demo of the wave shield playing assorted audio through a small speaker
The shield comes with an Arduino library for easy use; simply drag uncompressed wave files onto the SD card and plug it in. Then use the library to play audio when buttons are pressed, or when a sensor goes off, or when serial data is received, etc. Audio is played asynchronously as an interrupt, so the Arduino can perform tasks while the audio is playing.
* Can play any uncompressed 22KHz, 12bit, mono Wave (.wav) files of any size. While it isn’t CD quality (44KHz/16bit), it is certainly good enough to play music, have spoken word, or audio effects
* Output is mono, into L and R channels, standard 3.5mm headphone jack and a connection for a speaker that is switched on when the headphones are unplugged
* Files are read off of FAT16 formatted SD/MMC card
* Included library makes playing audio easy
Want more? Check out the webpage for documentation, code, schematics, etc & buy a kit!
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.