Exposed bare PCB smartwatch with ESP32-C3, MAX30102, IP5306 charging, microSD, haptic motor, USB-C, and 40 mm round 2-layer layout for JLCPCB BASIC assembly.

Seeed XIAO ESP32-C6 microSD Carrier Board

3.3 V acoustic sensor analog front-end using ZTS6216 MEMS microphone and TLV9062 gain/filter stages, tuned for 2.5 kHz response with ADC-ready output, test points, analog grounding, and manufacturable PCB rules.

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

Avionics-grade ESP32 data logger: low-noise 3.3V, I2C (MPU9250+BME280), SPI MicroSD, programming pads

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

A self-contained “retro PC” platform built around the ESP32, exposing classic PC-style IO: VGA video, PS/2 keyboard/mouse, audio-out to an onboard speaker, microSD storage, plus USB-C for power and USB-UART for programming/debug.

Battery-isolated 16-channel medical-grade EEG front end using dual ADS1299 analog front-ends and an STM32F405 host with integrated WiFi and microSD (SDIO), featuring corrected isolation, and robust low-jitter clock distribution for dual ADS1299 #WiFi #microSD #Isolation #Clocking #ADS1299 #STM32

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

A self-contained “retro PC” platform built around the ESP32, exposing classic PC-style IO: VGA video, PS/2 keyboard/mouse, audio-out to an onboard speaker, microSD storage, plus USB-C for power and USB-UART for programming/debug.

A self-contained “retro PC” platform built around the ESP32, exposing classic PC-style IO: VGA video, PS/2 keyboard/mouse, audio-out to an onboard speaker, microSD storage, plus USB-C for power and USB-UART for programming/debug.

10×10 mm 2-layer PCB with PCB-edge USB-A, top-insert push-push microSD, GL823K-HCY04 wired per datasheet, local decoupling within 5 mm, short parallel USB D+/D–, USB series resistors, TVS, ENIG gold fingers #USB #microSD #GL823K #10x10mm #ENIG

ESP32-S3 Audio Logger with Real-time Ambient Capture using I2S MEMS Microphone

Nextion HMI & Thermal Printer UART Integration with Enhanced microSD SPI Interface, ESD Protection, and LP3982-Regulated 3.3V Power Rail

Nextion HMI & Thermal Printer UART Integration with Enhanced microSD SPI Interface, ESD Protection, and LP3982-Regulated 3.3V Power Rail

Introducing our innovative modular, AI-powered DIY laptop carrier board project! This design focuses on a step-by-step approach, starting with a solid architectural scaffold that lays the groundwork for a high-performance system. The project is built around a hierarchical schematic structure including: • A Top Sheet outlining the system overview and power tree • SoM Connectors organized into three 100-pin assemblies (two CM4/5-compatible and one dedicated to high-speed operation) • Dedicated Power/PD management • An M.2 A+E interface for the Coral TPU (PCIe x1 from PORT0) • An M.2 M-key interface for an NVMe SSD (PCIe x2 from PORT1) • Comprehensive USB & Hub configurations • A microSD integration module • Supervisory and Reset controls The design aligns with cost-effective 4-layer board stackup practices (JLCPCB friendly) while following best high-speed design guidelines for USB/PCIe integrity. The integrated silkscreen placeholders feature custom sci-fi fonts for a unique, personal branding touch. Key routing notes include precise PCIe lane mappings based on the Orange Pi CM5 manual, ensuring clean ground return paths, effective decoupling, and proper AC-coupling placement. With paired USB hubs optimized for minimal depth and latency and robust power sequencing strategies, this project is poised to evolve into a high-speed, scalable prototype. #DIYElectronics #ModularDesign #PCBDesign #EmbeddedSystems #PCIe #USBDesign #OrangePiCM5 #TechInnovation #HighSpeedElectronics

Introducing our advanced RC Receiver Recorder with integrated 433MHz RF and PS4 controller support. This innovative device features 8 servo connections, enabling precise recording of movement routines directly onto an SD card for autonomous playback. With a built-in microphone input and dedicated audio output, it's perfect for synchronizing sound with motion for captivating animatronic and robotics projects. Elevate your creative projects with seamless control and dynamic performance. #RCReceiverRecorder #433MHzRF #PS4Controller #ServoControl #Animatronics #Robotics #SDCardRecording #AudioSync

XIAO MG24 Sense is an ultra-low-power wireless development board based on Silicon Labs' EFR32MG24 SoC, featuring a high-performance 78MHz ARM Cortex®-M33 core. It‘s Matter® native over Thread® and Bluetooth® Low Energy 5.3, all supported by the Arduino® Core. With 4MB Flash onboard, 19 GPIOs, LED, and charging circuit onboard, it boasts extremely low operating current and ultra-low-power modes, making it an ideal choice for IoT applications, especially battery-powered projects utilizing Matter® protocols. Additionally, the onboard analog microphone and six-axis IMU sensors make XIAO MG24 Sense a great fit for TinyML applications such as posture detection

Highly integrated single chip USB audio solution. All essential analog modules are embedded in CM108, including dual DAC and earphone driver, ADC, microphone booster, PLL, regulator, and USB transceiver.

Highly integrated single chip USB audio solution. All essential analog modules are embedded in CM108, including dual DAC and earphone driver, ADC, microphone booster, PLL, regulator, and USB transceiver.

Class AB Audio Amp with Aux and microphone inputs and adjustable volume control using potentiometers.

MIC_KMM3526982664DMB None KMM3526982664DMB Kingstate \nMEMS Microphone, High SNR, High AOP, SMD, 3.50*2.65*0.98mm, -26~±1dB, 1.8VDC, 100~10KHz, 64dBA\n In Stock None

Using the Raspberry Pi Pico microcontroller, I was able to design a hearing aid with volume control. The components and a description of why they were used: MCP3008 - CONVERTS ANALOG AUDIO SIGNALS INTO DIGITAL DATA CONVERTED BY THE MICROCONTROLLER MCP4725 - CONVERTS DIGITAL AUDIO SIGNALS TO ANALOG SO THE AUDIO CAN BE OUTPUTTED THROUGH A SPEAKER LM358 - USED TO AMPLIFY WEAK SIGNALS IN THE HEARING AID, REMOVES UNWANTED FREQUENCIES SPU0410LR5HQB - THIS COMPONENT IS A MICROPHONE, SPECIFICALLY CHOSEN BECAUSE IT IS OMNIDIRECTIONAL AND CAN CAPTURE AMBIENT SOUNDS, IT IS A SMALL COMPONENT PERFECTLY USED FOR NOISE REDUCTION, ASSISTING IN CAPTURING CLEAR AUDIO PAM8302AASCR - EFFICIENTLY AMPLIFIES AUDIO, AUDIO SIGNAL FROM DAC (VOUT) IS FED INTO THE INPUT OF THE AUDIO AMPLIFIER, WHICH OUTPUTS IDEAL FREQUENCY AUDIO CEM-1203(42) - SPEAKER WHICH OUTPUTS THE AUDIO AMPLIFIER MODIFIED FEATURE: POTENTIOMETER - WITH THE CCW CONNECTED TO GND, CW CONNECTED TO VDD, WIPER CONNECTED TO PIN 27 OF THE MICROCONTROLLER, THIS FEATURE IS A VOLUME ADJUSTER, WE ARE ABLE TO FULLY TURN OFF AND ON THE VOLUME BY ADJUSTING THE HEARING AID FOR THE IDEAL AUDIO OUTPUT

1. Overview: The Biskuit pendant is a wearable AI transcription assistant. An innovative device designed to seamlessly integrate into daily activities, providing real-time transcription and note-taking capabilities. Combining advanced AI algorithms with state-of-the-art hardware components, the device offers crystal clear audio recording, durable construction, and convenient features such as cloud synchronization, weatherproofing, and a vibrant display for animations and expressions. 2. Hardware Specifications: * Rechargeable Battery: Lithium-ion battery providing up to 150 hours of continuous operation. * Construction: Durable aluminum body ensuring longevity and protection against wear and tear. * Audio Quality: High-fidelity microphone array for clear and accurate transcription, with noise cancellation technology. * Weatherproofing: Sealed construction to withstand various weather conditions, making it suitable for outdoor use. * Versatile Mounting: Equipped with a magnetic clasp for easy attachment to clothing or accessories. * Connectivity: Wi-Fi and Bluetooth connectivity for seamless data transfer and integration with other devices. * Charging: USB-C port for fast and convenient charging, with support for various power sources. * Input Microphone Array: Multiple microphones strategically placed for optimal audio capture and transcription accuracy. * Display: Colorful screen for displaying animations, expressions, and status indicators, enhancing user interaction and personalization. 3. Software Features: * Real-time Transcription: Utilizes AI algorithms for instant transcription of spoken words into text, with high accuracy. * Note-taking: Automatically creates and organizes notes based on conversations, timestamps, and contextual cues. * Audio Recording: One-touch button for initiating audio recording, with options for manual or automatic saving. * Cloud Synchronization: Syncs transcription data to the cloud for easy access and retrieval from any device. * Speech Recognition: Advanced speech recognition technology for identifying speakers and distinguishing between multiple voices. * Language Support: Multilingual support for transcription and note-taking in various languages. * Customization: User-configurable settings for adjusting transcription preferences, language models, and display animations. * Security: Encryption and authentication protocols to ensure the privacy and security of transcription data. 4. Dimensions and Weight: * Dimensions: Compact and lightweight design for comfortable wearability. * Weight: Minimal weight to prevent discomfort during prolonged use. 5. Compatibility: * Operating Systems: Compatible with iOS, Android, and other major operating systems. * Applications: Integration with popular productivity and communication apps for seamless workflow management. 6. Warranty and Support: * Warranty: Manufacturer's warranty covering defects in materials and workmanship. * Support: Dedicated customer support for technical assistance, troubleshooting, and software updates. 7. Target Market: * Professionals: Ideal for professionals in various industries, including journalists, researchers, students, and business professionals. * Outdoor Enthusiasts: Suitable for outdoor activities such as hiking, camping, and fieldwork where reliable transcription and note-taking are essential. * Everyday Users: Provides convenience and efficiency for everyday tasks, such as meetings, lectures, and personal reminders. 8. Conclusion: The Wearable AI Transcription Assistant sets a new standard for wearable technology, offering unmatched transcription and note-taking capabilities in a compact and durable package. With its advanced features, seamless connectivity, vibrant display, and user-friendly design, it is poised to revolutionize how we capture and manage information in our daily lives while adding a touch of personality and fun with customizable animations and expressions.