Simple analog interface for stereo audio in. To interface the audio signal to the microcontroller's ADC a low noise, single supply, rail to rail, dual operational amplifier is on board.

Motherboard Interface:
2 pins on the module connector side, to be connected onto the ADC pin of the microcontroller.

External Interface:
RCA connectors on the input side.

Features:

• fixed offset
• fixed amplification (adjustable by replacing 2 SMD resistors)
• band pass filter for audio on board
• single supply, no additional power is needed
• low noise op-amp