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Thread: Help PAM8203A

  1. #1
    Junior Member
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    Help PAM8203A

    Hello

    I badly need your help
    I own the amplifactor PAM8302 from Adafruit:

    https://shop.mchobby.be/breakout/526...eur&results=40

    I have a Pi zero with a Phat Dac sound card:

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    As I use a passive speaker I wanted to connect the PAM8302 except that I do not know how to connect it to my Pi zero with Phat Dac.

    Could you tell me or connect it on GPIO or other?

    Thank you in advance.

  2. #2
    Senior Member bakker_be's Avatar
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    Looking at the image of this thing I'd say to just connect the output of your DAC to the "audio in +" and the "ground" pins of the supplied header, getting 5v from the PhatDAC header, to also connect to the "ground" pin and the "2-5VDC" pin (https://pinout.xyz/pinout/phat_dac)
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  3. #3
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    hello i use this topic :
    https://learn.adafruit.com/assets/27356
    all works great
    thank you so much for your help

  4. #4
    Quote Originally Posted by medapayne View Post
    Hello

    I badly need your help
    I own the amplifactor PAM8302 from Adafruit:

    I have a Pi zero with a Phat Dac sound card:

    As I use a passive speaker I wanted to connect the PAM8302 except that I do not know how to connect it to my Pi zero with Phat Dac.

    Could you tell me or connect it on GPIO or other?

    Thank you in advance.
    Hi medapayne

    I notice a few problems from your post:

    The phat dac is a Stereo DAC outputting a line level. If you connect the speaker directly as shown, you should not hear it unless you are at 10 cm in a quiet room.
    Also you use a mono ( 2 connections ) 3.5 mm plug into the stereo ( 3 connections ) socket of the phat dac. So you short 1 channel output and pick up the other channel.
    I tried to connect an external smal D-amp to the phat dac a few times. All failed because of ground loop and power interference issues .
    So your adafruit amp can be used, but I fear your audio quality will be poor unless you use 2 separate power supplies.

    A faster ready made solution could be the phat beat from the same maker. It has builtin speaker amps that will allow you to just connect the passive speaker. Even 2 pcs if you want stereo. I used it to drive big speakers at modest output levels, but with great pleasure
    Similar the speaker phat, has 1 mono amp of 2 watts and an small speaker included.

    Good Luck M-H
    Pi based multi-room audio system powered by PiCorePlayer(s):
    Pi3B with Phat-dac in a Rasptouch, 2 pi B+ with Cirrus Logic Audio Card, Pi Zero with Phat-beat , and a few other tests...

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