The Mini Radio based on the RDA5807 is compact and has a long battery life.

 
1. Project Introduction:
Project Name: Mini Radio;
Station Search Method: Automatic;
Supported Frequency: 50-108 MHz;
Demodulation Method: FM;
Dimensions: 36*36*15mm;
Battery Life: Approximately 20 hours of continuous listening using 220mAh*2 batteries; Finished
Product Weight: Approximately 18g.
 
Employs RDA5807 integrated chip for simple circuitry; built-in headphone driver for high reliability.
The step-down LDO section uses RT9013-30GB for high conversion efficiency and stability.
The charging section uses TC4056 for affordability and fast charging.
 
 
2. Update Directory:
2023.08.05: Created this project
2023.08.07: Completed project design
2023.08.15: Project feasibility verified
2023.08.19: Tested battery life of 20 hours
2023.08.30: Added four more units and started aging tests
2023.09.30 : Tested continuously for 30 days, with very stable results.
2023.10.25 : Established an open-source project and uploaded and produced subsequent files.
 
 
3: Documentation:
The BOM is in the attachment; the first column contains detailed tips for selecting less common materials.