Single sided non inverting LM3886 PCB - diyAudio
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Old 29th September 2005, 06:44 AM   #1
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Default Single sided non inverting LM3886 PCB

Hi everyone

Another LM3886 GC proyect.

The PCB is in PDF format, 1:1 scale and is oriented to the monoblock concept.
Provisions are made for dual rectifier snubberized power supply with dual size electrolitic filter capacitors footprint and polyester bypass capacitors.
Power on led acts as discharging path for the supply capacitors, when the amp is switched off.
Flexibility of the board allows 2 parallel input capacitors, ultrasonic input filter, poly capacitor between + & - pins, single bipolar or 2 opposite series Ci capacitors, switched or jumped mute circuit, Cf feedback capacitor, output Zobel network and series resistor or inductance (10 turns of 0.4mm enamelled copper wire, wound around the body of the 10 Ohm/ 2 W metalic film resistor).
The schematic will be posted soon.

M.Font
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File Type: pdf lm3886a_2.pdf (73.9 KB, 2763 views)
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Old 5th October 2005, 12:55 PM   #2
PierreG is offline PierreG  Canada
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Thanks. I like single sided boards. Easier to make at home.
Yes I would like to see the schematic and the components name on the silk screen.
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Old 5th October 2005, 06:31 PM   #3
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Default Single sided non inverting LM3886 PCB

Hello PierreG

Here it's the silk screen, with the parts reference.

Next post will include the schematic.

M. Font
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File Type: pdf lm3886_v1.0.pdf (71.6 KB, 1749 views)
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Old 5th October 2005, 08:58 PM   #4
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Smile Single sided non inverting LM3886 PCB

These are the schematics.

You may notice strange layout, like caps in paralel, etc. This is due to the difficulty to obtain some parts at my country.

Hope my work would be useful to your projects.
Let me know if you have improvements to do.

This post has the schematic of the amplifier section.

M. Font
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File Type: zip amp.zip (56.5 KB, 1538 views)
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Old 5th October 2005, 08:58 PM   #5
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Default Single sided non inverting LM3886 PCB

This is the PSU schematic


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File Type: zip psu.zip (46.5 KB, 1036 views)
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Old 15th November 2005, 07:20 PM   #6
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hi!!! this is exactly what I was looking for. schematic & pcb for a lm3886 project. thanks a lot!!!!


pd: somos vecinos, soy de Argentina tenés MSN?
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Old 4th December 2005, 07:44 PM   #7
ArtiomR is offline ArtiomR  Lithuania
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Thanks a lot for your PCB tla-Audio Recently I was in search for a good PCB for LM3886, and yours looks nice and with fat simmetrical ground

But I think, there is one mistake in your schematic and PCB - R2 resistor should be connected between Cin and R1, so that they form a high pass filter

It would be very nice if you corrected this little issue and posted a new PCB file. Of course, I could do it for myself(in Paint ), but pdf is much better(scaling without squared edges)

Regards,
Artiom
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Old 29th July 2007, 05:15 PM   #8
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Hello ArtiomR,

Did you make the LM3886 PCB? Do you have a corrected version of the PCB layout posted by tla-Audio? If so, could you please upload it?. Thanks very much.


Pramod Kumar
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Old 2nd August 2007, 08:16 AM   #9
tubob is offline tubob  Malaysia
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tla

do you intend to sell the pcb ?...
or just want to share the work?..it is good

bob
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Old 3rd August 2007, 04:54 PM   #10
ArtiomR is offline ArtiomR  Lithuania
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Somehow I didn't make an amp with Miguel's PCB Probably cause at that time I already made one with another PCB. The result didn't impress me Maybe I got fake LM3886s (one chip was not functional and after breaking it I saw a die glued slantwise!), or it was the PCB... anyway I lost interest in these chips. (I had better luck with TDA7294)

Anyway you may try Miguel's PCB - it looks nice

Artiom.
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