I want to listen to my MP3 player (Sansa Clip +) in my truck (which has no auxiliary input to the radio) and I don't want to fool with an RF transmitter. It's against the law to wear headphones or earbuds, so I have breadboarded an amplifier using an LM386N-3. It's the Amplifier with Gain = 20 example on P. 5 of the attached datasheet. In addition to what's there, I have added a .1μF and a 10μF cap across the power leads of the amp, and I have a 10μF cap coupling the output from one side of the MP3 player directly into pin 3 of the LM386 (no 10K pot.) I plan to use the volume control on the MP3 player to control the sound level. I also don't have a .05μF cap to go on pin 5, so I am using a .1μF.
It seems to be working, although I still have some noise issues, but I think they will work out when I shorten component leads and eliminate clip leads. I am planning to build this up on a piece of perfboard tomorrow, but are there changes I should make first?
Secondly, I don't need stereo and would like to combine both outputs from the MP3 player and feed the combined output into the LM386. Would someone post a simple circuit for combining the outputs? Thanks.
BTW, I am leaving the computer now (to go to a Christmas concert) so I won't be responding to posts until much later tonight.
Thanks again.
It seems to be working, although I still have some noise issues, but I think they will work out when I shorten component leads and eliminate clip leads. I am planning to build this up on a piece of perfboard tomorrow, but are there changes I should make first?
Secondly, I don't need stereo and would like to combine both outputs from the MP3 player and feed the combined output into the LM386. Would someone post a simple circuit for combining the outputs? Thanks.
BTW, I am leaving the computer now (to go to a Christmas concert) so I won't be responding to posts until much later tonight.
Thanks again.
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