Raspberrypi Pico-based sampler, sequencer + drum machine w/ an embedded speaker, Adafruit I2S amplifier and momentary step switches, evoking the tr808 synthesizer ⁠

Raspberrypi Pico-based sampler, sequencer + drum machine w/ an embedded speaker, Adafruit I2S amplifier and momentary step switches, evoking the tr808 synthesizer ⁠

This compact breakout board makes it easy to add high-quality audio output to your microcontroller projects using the MAX98357A/B Class D audio amplifier. Perfect for Arduino, ESP32, Raspberry Pi, or any microcontroller with I2S output capabilities. Features High-Performance Audio: Delivers Class AB audio quality with Class D efficiency (92% efficient at 1W) Powerful Output: 3.2W into 4Ω speakers at 5V supply Clean Sound: Low distortion (0.013% THD+N at 1kHz) Wide Supply Range: Operates from 2.5V to 5.5V Simplified I2S Interface: No MCLK required, just BCLK, LRCLK, and DIN Selectable Gain: Solder jumpers for easy gain selection (3dB, 6dB, 9dB, 12dB, or 15dB) Channel Selection: Configure for left, right, or combined (mono) output Filterless Design: No need for external output filtering components Compact Form Factor: Minimal board space with optimized layout Applications Smart speakers and voice assistants Portable audio devices IoT audio projects Gaming devices and sound effects Educational audio projects Digital instrument amplification The FLUX MAX98357 breakout board requires only three I/O pins plus power, making it the perfect audio solution for projects where simplicity and sound quality matter.

This is a Kitchen Assistant Reference Design that runs on an ESP32 that connects to the network. The board has a microphone and bazer for communication and a display #referenceDesign #edge-computing #edgeComputing #espressif #template #esp32 #iot #i2s #reference-design

1x8ch I2S/TDM, 1x8ch PDM, 2x2ch I2S

This is a Kitchen Assistant Reference Design that runs on an ESP32 that connects to the network. The board has a microphone and bazer for communication and a display #referenceDesign #edge-computing #edgeComputing #espressif #template #esp32 #iot #i2s #reference-design

Raspberrypi Pico-based sampler, sequencer + drum machine w/ an embedded speaker, Adafruit I2S amplifier and momentary step switches, evoking the tr808 synthesizer ⁠

Compact ESP32-S3 Smart Glasses Starter PCB with OV2640 Camera, I2C Mux, I2S Audio, LiPo Charging, and USB-C Debug Interface

BoomPack Dual ESP32 Audio Pod — synchronized multi-room audio pod using dual ESP32-WROOM-32U modules, USB-C Li-ion charging, 5V boost power, and MAX98357A I2S speaker output.

Raspberrypi Pico-based sampler, sequencer + drum machine w/ an embedded speaker, Adafruit I2S amplifier and momentary step switches, evoking the tr808 synthesizer ⁠

ADC, Audio 8k ~ 192k I²S

Raspberrypi Pico-based sampler, sequencer + drum machine w/ an embedded speaker, Adafruit I2S amplifier and momentary step switches, evoking the tr808 synthesizer ⁠

Raspberrypi Pico-based sampler, sequencer + drum machine w/ an embedded speaker, Adafruit I2S amplifier and momentary step switches, evoking the tr808 synthesizer ⁠

Portable ESP32-S3 AI voice assistant development board with USB-C programming, LiPo charging, OLED, I2S microphone/amplifier, SPI flash, and microSD expansion.

USB-C powered ESP32-S3 Wi-Fi voice assistant hub with MEMS microphone, I2S class-D speaker output, protected USB, and manufacturing-focused PCB.

2-layer Raspberry Pi 4 HAT for a smart audio translation system with I2S microphone, I2S amplifier, speaker terminal, buttons, LEDs, protected 5V input, and test points.

Multi-subsystem ESP32-S3 coffee maker/alarm controller board for a Coffee Waker appliance. The design uses an ESP32-S3-WROOM-1-N8R8 module as the main Wi-Fi/Bluetooth MCU, with USB-C 2.0 device connectivity through a USB4105-GF-A connector, 5.1 kΩ CC pull-downs, and USBLC6-2SC6 ESD protection on the USB D+/D− pair. Power architecture includes a 12 V input on a JST VH B4P connector, a TPS62932 buck regulator generating the 5 V rail, a TLV1117LV33 3.3 V LDO for MCU/logic power, and TPS22919 load switches for controlled 3.3 V/5 V peripheral rails. Functional blocks include an NAU7802 load-cell ADC on I2C with two differential load-cell channels, a MAX98357A I2S audio amplifier/DAC with speaker/output filtering, a microSD socket on SDIO, I2C/test headers, UART/programming header, and auxiliary JST VH connectors for wake-light or external loads. The high-voltage section includes 120 VAC input/output screw terminals, a 5 V SPST-NO relay rated 15 A / 240 VAC max, a 1 A fuse, MOV surge suppression, diode snubber, and a dedicated heater output terminal.

Custom base PCB for a Blue AI figurine with ESP32-S3 Wi‑Fi/BLE, I2S microphone and speaker audio, LiPo battery charging, eye LEDs, and expansion wiring into the figure.

Beginner-friendly button-triggered speaker sound playback PCB with USB loading/debug, microSD storage, ESP32-S3 controller, and I2S speaker amplifier.

Compact ESP32-S3 AI robot controller with DevKitC-1 module, 2S Li-ion power input, 5V buck regulator, optional clean 3.3V rail, TB6612FNG dual motor driver, OV2640 camera FPC, I2S audio, OLED, ultrasonic and TCRT5000 sensor headers, and a compact 2-layer PCB prepared for Gerber export.

ESP32-S3 Wearable Audio Streaming Pendant (USB-C + LiPo + I2S Mic + microSD + OLED)

ESP32-S3 CAM Audio-Visual Controller with I2S MEMS Microphone, Class-D Amplifier, SPI Display, Servos, Capacitive Touch and Integrated USB-C Power-Only Sink (VBUS via J6 -> 5V_IN -> SW1:P1 -> 5V_SW, CC1/CC2 5.1 kOhm to GND, VBUS TVS Surge Protection) + Added optional bulk electrolytic caps on 5V_SW near servo headers

ESP32-S3 CAM Audio-Visual Controller with I2S MEMS Microphone, Class-D Amplifier, SPI Display, Servos, Capacitive Touch and Integrated USB-C Power-Only Sink (VBUS via J6 → 5V_IN → SW1:P1 → 5V_SW, CC1/CC2 5.1 kΩ to GND, VBUS TVS Surge Protection) #USB_C #PowerManagement #5V

Compact 4-Layer ESP32-S3-DevKitC-1 Nano-Style Carrier Board with I²S Audio, Class-D Amp, MicroSD, LiPo Power, WS2812B, and IR; featuring updated all-layer antenna keepout, additional decoupling capacitors on 5 V/3.3 V rails, four M3 mounting holes, finalized rounded-corner PCB outline and hand-friendly width, centered ESP32-S3-DevKitC-1 and symmetrically aligned MicroSD/I²S mic, centered bottom silkscreen title text, and zero-error ERC/DRC; layout is finalized and ready for routing #ESP32S3 #DevKitC1 #antennaKeepout #decoupling #M3MountingHoles #routingReady

ESP32-S3 Voice Assistant Core Board (50x50 mm, 4-Layer) with USB-C, Li-ion Power Management, and I2S Audio – Design Ready for PCB Layout and Fabrication