Hello Everyone,
I purchased an Adafruit Audio FX Sound Board - WAV/OGG Trigger with 16MB Flash and have it connected to the Stereo 3.7W Class D Audio Amplifier - MAX98306.
While I was working on it I played a song through a small 4 ohm speaker and it worked just fine. I then replaced the audio, files leaving all the wiring the same, and when I went to play the sound I heard a pop and the FX board started smoking. The only difference that I can think of is that the new audio file was much louder than the previous one, but I don't know why this would cause the board to fry.
I'm going to have to purchase another one, but I don't want this to happen again since they are $30 a piece. Any help on how to avoid this from happening again would be greatly appreciated.
Burned Audio FX Sound Board
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- Franklin97355
- Posts: 23911
- Joined: Mon Apr 21, 2008 2:33 pm
Re: Burned Audio FX Sound Board
Could you post large, clear, detailed pictures of both sides of your board and the connections to it? Pictures should be less than 1meg in size. 800x600 works well.
- matthew_coleman
- Posts: 1
- Joined: Tue Sep 01, 2015 2:03 am
Re: Burned Audio FX Sound Board
@Number_X,
I recently had a case similar problem on the MAX98306 Adafruit board. Long power supply cables are suspected to be the problem. We are testing this but it will take a week or so.
The proposed solution is to put some bulk capacitance at the power supply inputs. ~220uF should be about right. This is only necessary for long power supply cables. When you use it close to a good power source then it doesn't need it. The MAX98306 datasheet does recommend this but it could be much clearer. Who really reads the whole datasheet before using a part?
Disclosure: I am a field Application Engineer with Maxim so am here to fix these problems.
I recently had a case similar problem on the MAX98306 Adafruit board. Long power supply cables are suspected to be the problem. We are testing this but it will take a week or so.
The proposed solution is to put some bulk capacitance at the power supply inputs. ~220uF should be about right. This is only necessary for long power supply cables. When you use it close to a good power source then it doesn't need it. The MAX98306 datasheet does recommend this but it could be much clearer. Who really reads the whole datasheet before using a part?
Disclosure: I am a field Application Engineer with Maxim so am here to fix these problems.
Please be positive and constructive with your questions and comments.