🔶 MAX98357 I2S 3W Class-D Audio Amplifier Breakout – I2S DAC Module for ESP32 & Raspberry Pi. MAX98357 Pin ESP32 (example) Raspberry Pi (40-pin) ------------- ---------------- --------------------- VIN / VDD 5V or 3.3V 5V (Pin 2/4) or 3.3V GND GND GND BCLK GPIO26 GPIO18 (PCM_CLK) LRCLK / WS GPIO25 GPIO19 (PCM_FS) DIN / DATA GPIO22 GPIO21 (PCM_DOUT) SPK+ / SPK− 4–8 Ω speaker 4–8 Ω speaker.
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