Hi, I am using a PIC18 to play a WAV file from the a SD card using the PWM module. Using the circuit from here https://projectproto.blogspot.sg/2010/05/pic18f-sd-wav-audio-player.html, I feed the output to the LM386 amplifier circuit following this schematics https://www.hobby-hour.com/electronics/lm386-power-audio.php
I am using the gain=20 circuit. I try with gain=200 and there is no difference.
Connecting it to an 8-ohm speaker taken from an old radio, I could hear the sound being played in the speaker. However, the volume is still not loud enough and distorted. The speaker was capable of playing very loud sound when it was still in the radio.
Is there anything I need to change to make it louder? thanks.
I am using the gain=20 circuit. I try with gain=200 and there is no difference.
Connecting it to an 8-ohm speaker taken from an old radio, I could hear the sound being played in the speaker. However, the volume is still not loud enough and distorted. The speaker was capable of playing very loud sound when it was still in the radio.
Is there anything I need to change to make it louder? thanks.
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