Adafruit is celebrating Lunar New Year 🐍 Wednesday 1/29/2025. In combination with MLKDay, shipping could be delayed. Please allow extra time for your order to ship!
An ESP32-based internet radio streamer #ESP32 @ddimitr
Dimitris has taken an unused ESP32 board and fashioned an I2S streaming internet radio.
I hooked up a tiny DAC board that I had lying around (sporting an ES9023 chip – very practical since the ESP32 does not output an MCLK signal), and the thing worked flawlessly on the first try!
So I thought that I should do a carrier board for the ESP32 that would perform the following:
Host the ESP32 board,
Provide regulated power to the ESP32,
Provide headers for serial port (programming), SD card, extra I/O, and perhaps for an LCD,
Do galvanic isolation of the I2S signals,
Provide buffered I2S output for connecting to an outboard DAC board,
Have an on-board DAC with line level outputs.
Since this device would only stream internet radio (a.k.a. “heavily compressed audio”), the on-board DAC did not have to be anything special. So let’s go with the all time classic ES9023.
Let’s also do a relatively good power supply for the critical component (dac chip) but nothing extreme. The rest of the audio-related components can be powered by well respected LP5907 LDOs, while the actual ESP32 can be powered by a run-of-the-mill LM1117.
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 7:30pm ET! To join, head over to YouTube and check out the show’s live chat and our Discord!
Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: CircuitPython 2025 Wraps, Focus on Using Python, Open Source and More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
I can read resistor color code all day!