A pocket-size audio project built around a PAM8403 class-D amplifier. The design pairs a small speaker with a phone battery, TP4056 charging module, switch, LED, and audio jack, then packages everything into a small container.
Specifications
RoleDesigner and builder
ModulesPAM8403 amplifierTP4056 charger3.5 mm audio jackSmall speaker
Tech tagsPAM8403AudioTP4056Battery
Project photos
Finished mini speaker
Parts used in the build
Audio amplifier wiring
Battery and charging module wiring
Implementation details
Power
A single-cell phone battery feeds the amplifier through a switch, with the TP4056 board handling charging.
