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I will design esp32 s3 ai voice recorder pcb with 3 mic array and emmc storage
About this Gig
Hello Buyer,
My name is Davis. I'm an electronics and embedded systems engineer specializing in ESP32 S3-based audio hardware, including AI voice recorders, smart speakers, far field voice capture devices with multi mic arrays and onboard storage.
If you're building an AI voice recorder, smart assistant device, transcription gadget, or any voice-capture product, I can design the complete hardware and firmware system from schematic to working prototype.
Services included in this gig:
- Custom schematic design based on ESP32-S3
- Multi-layer PCB layout
- 3-microphone array integration for beamforming/far-field pickup
- eMMC storage integration for onboard audio recording
- I2S digital audio interface design
- Audio codec selection and integration
- USB-C interface for data transfer, charging, and firmware flashing
- Bluetooth/Wi-Fi connectivity firmware
- Embedded firmware development
- Wake-word detection and voice activity detection (VAD) integration
- Noise reduction, echo cancellation, and beamforming firmware support
- Battery charging circuit with power management
Whether you need a full end toend device or firmware only for an existing board, I can scope the project around your exact goals.
Specialization:
Circuit design
•
Schematics
•
Layout
•
Analysis
•
Gerber
File format:
Gerber
•
STEP
•
SCH
•
3DS
•
Software:
Allegro
•
Altium Designer
•
EasyEDA
•
Fusion 360
•
KiCad
•
Arduino
FAQ
Why use a 3-mic array instead of a single microphone?
A 3 mic array enables beamforming and far-field voice pickup, which significantly improves recording clarity and noise rejection compared to a single mic especially useful for AI voice capture in real world environments.
Why eMMC instead of an SD card?
eMMC is soldered directly to the board, offering better reliability, faster read/write speeds, and a more compact, tamper-resistant design compared to removable SD cards.
Can this support on device wake word detection?
Yes, I can integrate ESP SR (Espressif's speech recognition framework) for offline wake-word and command detection, included in the Premium package.
Will this connect to the cloud or an app?
The core deliverable is the hardware and local firmware. Cloud/app integration can be scoped as a custom add on let's discuss your specific requirements.
Do I receive the firmware source code?
Yes, fully commented firmware source code is included in the Standard and Premium packages.
Can you help with manufacturing?
I provide manufacturing-ready Gerber files and BOM, and can recommend fabrication/assembly houses, though manufacturing itself isn't included in the gig price.
