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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 23 Jan 2017, 14:15 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
Magnus, looking forward to the images of the completed amp.

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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 23 Jan 2017, 15:00 
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Joined: 02 Mar 2009, 12:41
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Location: Vänersborg, Sweden
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

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“If you don't know where you are going, any road will get you there.”
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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 23 Jan 2017, 15:08 
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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


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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 23 Jan 2017, 15:52 
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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.

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Magnus

“If you don't know where you are going, any road will get you there.”
―Lewis Carroll


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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 23 Jan 2017, 16:54 
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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.


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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 25 Jan 2017, 12:55 
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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


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Magnus

“If you don't know where you are going, any road will get you there.”
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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 28 Jan 2017, 10:17 
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nice magnus, i hope you'll find out solving the ground problem. good idea with the 3,7 v rechargeable battery


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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 28 Jan 2017, 11:37 
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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 ...

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IMG_0084.jpg


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“If you don't know where you are going, any road will get you there.”
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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 10 Feb 2017, 10:29 
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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


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Magnus

“If you don't know where you are going, any road will get you there.”
―Lewis Carroll


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 Post subject: Re: PAM8403 - 3+3W D-amp
PostPosted: 11 Feb 2017, 01:02 
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Joined: 28 May 2008, 21:53
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Location: Winnipeg, CANADA
Nice work Magnus. The ipod amp looks real slick.

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