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This compact audio amplifier board is based on the PAM8403 integrated circuit, providing 2×3 W power with a supply voltage of 2.5 V–5.5 V for 4–8 Ω speakers. The corresponding implementation already includes a built-in volume control potentiometer, making it easy to use in DIY hi-fi systems, portable speakers, or microcontroller projects. It is highly efficient (>90%) and features thermal and overcurrent protection, making it a practical choice for those seeking simple audio amplification without many components.
