Mini Amplifier board

The motherboard adopts PAM8403 typical circuit design, adopts MICRO USB power supply (reserved wire bonding interface), which is very convenient to use universal mobile phone charger for power supply. The resistor container part adopts standardized SMT process, and the design is simple and stable. The interface is Bluetooth audio receiving module, which can be easily DIY small. The Bluetooth speaker board can pick up 8 ohm 4 ohm small speakers for all frequency speakers or full range small speakers.