Introduction - If you have any usage issues, please Google them yourself
Audio signal output audio equipment, go through the pre-amplifier distortion-free pre-amplification, digital audio processor TDA7315 single-chip AT89C52 under control, the input audio signal is automatically adjusted so that the output audio signal amplitude reaches the predetermined requirements. AT89C52 output signal is sampled for analysis TDA7315, TDA7315 volume to achieve automatic control. System simultaneously with the display output signal level, the output level set function.