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PAM8403 - 3+3W D-amp
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Author:  mwhouston [ 23 Jan 2017, 14:15 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

Magnus, looking forward to the images of the completed amp.

Author:  Soundbrigade [ 23 Jan 2017, 15:00 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

Have to fix the problem with the potentiometer and maybe make a simple sketch how I hooked all together. There should be possible to show how I hooked up the iPod. And add the electrlytic proposed by our Danish friend.

I have a project a little bit like this one - http://www.instructables.com/id/DIY-Tough-Bluetooth-Speaker/. Got the box, speakers and a radio/BT/USB-module like the one in the Instructables.
A similar thing here: http://www.instructables.com/id/Portable-Bluetooth-Speaker-2x3W-Finished-/?ALLSTEPS

Author:  KrammeAcoustics [ 23 Jan 2017, 15:08 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

what a nice build magnus ...love it :up:

even a relative small enclosure, looks like a giant housing, when focusing on the small amp board ..hahaha :D

Image

Author:  Soundbrigade [ 23 Jan 2017, 15:52 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

I can tell you, all the "free" space in between is now occupied by the battery.
The PCB is "glued" to the space between the speaker conns with double sided tape.

Author:  KrammeAcoustics [ 23 Jan 2017, 16:54 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

Soundbrigade wrote:
I can tell you, all the "free" space in between is now occupied by the battery.
The PCB is "glued" to the space between the speaker conns with double sided tape.


can't wait to see this little beast getting wired :wine:
i prefer thin single solid core ( telephone wire ) for such a small build, it's easier to solder and work with.

Author:  Soundbrigade [ 25 Jan 2017, 12:55 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

Here's a shot with all stuff (minus Kramme's electrolytic). Will change the cable from potentiometer to amp to a thinner and am, right now looking for the grounding problems.

Attachment:
PAM_11.jpg

Author:  KrammeAcoustics [ 28 Jan 2017, 10:17 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

nice magnus, i hope you'll find out solving the ground problem. good idea with the 3,7 v rechargeable battery

Author:  Soundbrigade [ 28 Jan 2017, 11:37 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

I have propably found the gnd-problem. When listening to my iPod, I noticed that Steve Hogarth (Marillion) sang with very low voice, so I guess I have simply swapped the connections at the earphone plug in the docking station. Will fix that tomorrow maybe.

I have also encounted another problem. To be able to make my larger 2-way speakers (The un-orthodox 2-way speakers as published some 10 years ago in AudioXpress) sing, I need something more substantial and bought a class D amp from ebay. However, it was of the kind that only get connected to Bluetooth stuff. Maybe I buy a BT-transmitter for my PC tomorrow and I have already found a similar amp with "normal" line input.

But this one is also very small - 2x25W ...

Attachment:
IMG_0084.jpg

Author:  Soundbrigade [ 10 Feb 2017, 10:29 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

Photos of the completed unit. Fixed the bad sound - loose wire in the iPod dock.

Attachment:
PAM_10.jpg


Also finished a second one, housed in an Altouids minty tin box. The minty box next to it is a MintySynth, an Arduino-based synthesizer (in a tin box).

Attachment:
PAM_13.jpg


Attachment:
PAM_14.jpg


Attachment:
PAM_15.jpg

Author:  Gio [ 11 Feb 2017, 01:02 ]
Post subject:  Re: PAM8403 - 3+3W D-amp

Nice work Magnus. The ipod amp looks real slick.

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