MAX98357A mono amp

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Rocco99
 
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Joined: Sun Jan 19, 2014 5:20 pm

MAX98357A mono amp

Post by Rocco99 »

I have been using this item which I purchased on December 2nd for the last two weeks. I had been experiencing intermittent problems which I attributed to software not loading the I2S overlay, and posted on the forum seeking help. No one knew why I was having problems. In any case It was finally working, so I suspected some hardware or software problem on my part, then last night while using the project , audio stopped while I was listening to it. At least I thought it had stopped. There was still audio but i had to put my ear very close to the speaker to hear anything. I bought this on 12/2/2021 on order number 2728181-2312618253. I was unable to use it immediately because of the holidays. It is connected correctly otherwise I would not have been able to use it at all.

I can still hear audio now if I put the speaker very close to my ear. I believe that the item is defective in some way and wished I had determined that earlier. You help is appreciated.
Thank you.

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rpiloverbd
 
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Re: MAX98357A mono amp

Post by rpiloverbd »

Hello, have you checked your power supply? Is it giving sufficient voltage and current output?

Rocco99
 
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Re: MAX98357A mono amp

Post by Rocco99 »

Using genuine raspberry pi power supply 2.5 amps. Also tried rpi 3a power supply.

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rpiloverbd
 
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Re: MAX98357A mono amp

Post by rpiloverbd »

Oh. Looks like there is no problem in your setting. Let's see if the Adafruit team give a good solution.

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adafruit_support_carter
 
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Re: MAX98357A mono amp

Post by adafruit_support_carter »

Please post a photo of your setup showing how everything is connected.

Rocco99
 
Posts: 81
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Re: MAX98357A mono amp

Post by Rocco99 »

Best I could do without dismantling everything
Best I could do without dismantling everything
BBCRadio.jpg (52.94 KiB) Viewed 122 times
Picture included.

Connections are as follows:
Amp Vin to RPI5V
Amp Gnd to RPI Gnd
Amp DIN to RPI 21
AMP BClk To RPI 18
Amp LRClk to RPI 19

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adafruit_support_carter
 
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Re: MAX98357A mono amp

Post by adafruit_support_carter »

Thanks. Is that the speaker under the hot glue? Do you have a link to any product info on what speaker is being used?

Rocco99
 
Posts: 81
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Re: MAX98357A mono amp

Post by Rocco99 »

That is an adafruit speaker placed in a 3d printed enclosure without a back.

Rocco99
 
Posts: 81
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Re: MAX98357A mono amp

Post by Rocco99 »

The adafruit product number is 3351

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adafruit_support_carter
 
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Re: MAX98357A mono amp

Post by adafruit_support_carter »

OK, that combination of speaker/amp should work. It was working, then not working. Can you correlate that to anything?

Rocco99
 
Posts: 81
Joined: Sun Jan 19, 2014 5:20 pm

Re: MAX98357A mono amp

Post by Rocco99 »

Only that I had intermittent problems over the past two weeks which I attributed to the overlay for I2S mmap not consistently loading.
However, at some point it all started working correctly. I was very pleased with the result. Then while I was listening to a broadcast, it suddenly stopped. I have not been able to get a peep out of it since. There is audio, but only if I literally place my ears to the speaker.

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