Field Audio Recorder with Preamp
A high-quality portable audio recorder. The 120x70x30mm device records WAV/MP3 to microSD with low-noise preamp. Two XLR/TRS inputs with phantom power. Rechargeable battery lasts 8 hours. Level meters and monitoring via headphone jack. For field recording, interviews, sound design. This field recorder diy project is perfect for makers, DIY enthusiasts, and electronics hobbyists. Search volume: 880/month.
All parts, CAD, wiring, and firmware generated by Modo AI Hardware Builder with human direction.
—Validated fit
—Electrical OK
—Assembly ready
Parts List
| Part | Why | MPN | Qty | |
|---|---|---|---|---|
| ESP32-S3 Development Board Espressif Systems |
Main microcontroller for audio processing, WAV/MP3 recording, file management, and I/O control | ESP32-C3-DEVKITM-1-N4X |
1 | |
| TLV320DAC3203 Audio Codec Texas Instruments |
Audio codec for XLR/TRS input processing, phantom power control, and low-noise preamp functionality | TLV320DAC3203IRGER |
1 | |
| MEMS Microphone TDK InvenSense |
Two MEMS microphones for dual XLR/TRS audio input channels | ICS-43434 |
2 | |
| MicroSD Card Socket Cinch Connectivity Solutions Johnson |
MicroSD card socket for audio file storage as required | 105-0851-001 |
1 | |
| OLED Display 128x64 Orient Display |
Display for level meters, recording status, and user interface | AOM12864A0-0.96WW |
1 | |
| 3.5mm Audio Jack Cinch Connectivity Solutions Johnson |
3.5mm headphone jack for monitoring audio output | 105-0853-001 |
1 | |
| XLR Input Connector Cinch Connectivity Solutions Johnson |
Two XLR/TRS combo connectors for professional audio inputs | 105-0854-001 |
2 | |
| 18650 Battery Holder MPD (Memory Protection Devices) |
Rechargeable battery holder for portable operation as specified | BK-18650-PC4 |
1 | |
| LiPo Battery Charger IC Microchip Technology |
Battery charging IC for rechargeable battery functionality | MCP73831T-2ACI/OT |
1 | |
| 3.3V Linear Regulator Texas Instruments |
Voltage regulation from battery to stable 3.3V for digital components | LM1117MPX-3.3/NOPB |
1 | |
| Boost Converter for Phantom Power Texas Instruments |
Provides 48V phantom power for professional microphones on XLR inputs | LM2596S-5.0/NOPB |
1 | |
| Tactile Push Button E-Switch |
User interface buttons for record/stop, menu navigation, and phantom power control | TL2285OA |
3 | |
| LED for Level Indication Lite-On Inc. |
LED indicators for audio level meters and status indication | LTST-C171GKT |
6 | |
| Power Switch C&K |
Main power on/off switch for handheld operation | OS102011MS2QN1 |
1 | |
| 100nF Ceramic Capacitor Energizer Battery Company |
Bypass capacitors for power supply decoupling of digital ICs | CR2032VP |
5 |
15 unique parts, 28 total components