Contact person: Compact Audio Playback Device Development

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Location: Delhi, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Project: Compact Story Playback Device with Sync LED & USB-C Rechargeable Battery
Overview
I am looking for an electronics/circuit designer to create a compact playback device capable of storing and playing 300 short audio stories (each ~2 minutes long). The entire design must fit within a 2-inch by 2-inch enclosure and include a USB-C rechargeable battery system, waterproof speaker, LED indicator synced to playback, and basic control buttons.
Key Requirements
Form Factor
Entire design (PCB + components + speaker) should fit into a 2” x 2” square enclosure.
Slim and efficient layout.
Audio Storage & Playback
Ability to store and play up to 300 audio files (~2 minutes each).
High-quality playback through an in-built waterproof speaker.
Audio format can be compressed (e.g., MP3, WAV) to optimize storage.
User Interface & Controls
Buttons: Next, Previous, Stop, and Power.
LED indicator: Should light up and sync with the story being played.
Power & Charging
Rechargeable battery (sized for compact design).
USB-C charging port with standard charging circuitry.
Battery runtime should support extended playback.
Other Requirements
Circuit should be designed for low power consumption.
Waterproof or water-resistant design considerations for the speaker and enclosure.
Designer should provide schematics, PCB layout, and component list (BOM).
Deliverables
Complete circuit design + PCB layout.
Component list (BOM) with sourcing suggestions.
Recommendations for suitable waterproof speaker and battery within given size constraints.
Guidance on firmware/software (if needed) for playback and LED sync.
Skills Required
Experience with compact PCB design.
Knowledge of audio storage/playback circuits.
Familiarity with USB-C charging and battery management systems.
Understanding of LED driver circuits.
Ability to recommend cost-effective and reliable components.
Notes for Designers
Keep the design compact and power-efficient.
Ensure ease of assembly for small-scale production.
If off-the-shelf modules can be integrated (e.g., DFPlayer Mini, ESP32, or custom MCU solution), propose the best balance of cost, size, and performance." (client-provided description)