The audio solution for the TinyPICO featuring 24bit DAC, MEMS Microphone, 3.7W Amp, Amplified Headphone Jack , GPIO Expander & microSD Card.Designed by AKsevenFour in Australia
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PicoAUDIO The audio solution dedicated to the TinyPICO. About Purchased units are fully assembled as per the main image The picoAUDIO is a fully featured audio solution specially made for the TinyP...Read More…
The audio solution dedicated to the TinyPICO.
Purchased units are fully assembled as per the main image
The picoAUDIO is a fully featured audio solution specially made for the TinyPICO ESP32 development board, featuring an I2S Stereo DAC, I2S Mono MEMS Microphone, builtin 3.7W Stereo Amplifier, dedicated Headphone Amplifier, I2C GPIO Extender and built-in MicroSD card reader.
We utilise a low power NXP UDA1334A IC featuring a clear digital 16/20/24 bit, 44.1kHz, stereo audio DAC. Accompanying the DAC is a Knowles SPH0645 I2S digital mono microphone. This miniature low power MEMS microphone provides a low noise, 24 bit, 44.1kHz stream. Complimenting the DAC is the powerful Maxim MAX98306 3.7W stereo class D amplifier with stero speaker terminals and a Texas Instrumets TPA6132A2 stereo headphone amplifier with 3.5mm audio jack.
A simple mounting socket hosts the TinyPICO development board and connects all of these great features together in a seamless and easy to utilise footprint measuring a tiny 33 mm x 57 mm (1.29in x 2.24in). To provide maximum connectivity the board features a built-in MicroSD card reader and GPIO extender to hookup 8 inputs and outputs for all of your button and LED needs.
While the ESP32 does have two built-in DACs that are capable of generating stereo audio, the accuracy of these DACs is severely limited when compared to the dedicated audio codec found on the picoAUDIO. The default ESP32 DACs are 8bit whereas the picoAUDIO's DACs can operate at 16, 20 or 24bit. This is a much higher resolution, providing higher fidelity sound for your audio projects. Coupled with the built in microSD card reader you will be playing high quality audio in no time.
While a lot of audio boards provide an audio jack to connect your device to an external amplifier, few boards provide a properly amplified headphone audio jack. Many boards utilise large capacitors to drive headphones but create significant noise and distortion as a result. The picoAUDIO board uses a dedicated Texas Instruments headphone amplifier with selectable gain to provide high fidelity headphone audio.
The software and hardware used in this project has been made possible by the principle of open hardware and software. Many of the samples have been collected together from a variety of authors and edited to work out of the box with the picoAUDIO for instructional purposes. Please consult each sample project for relevant license and credit.
The picoAUDIO board is an open hardware project. All Eagle CAD schematics, PCB layout files and gerbers are provided on GitHub and distributed under the MIT license.
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