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Now has come the time to make new one, which will be the last. This one has several new things on that previous didn't have, like feedback, new output layout of components, fuses, more output capacitors,secondary voltages,... things like that.

Here are some pictures of this new board and program 3D Eatched TOP BOTTOM 3D Real life

Edit, 15.10.2007 :

I have finnished working on it. I did change few things, such as diffrent transformer, that is toroid now, added two secondarys for +/-12v, so that less heat is produced in output power zeners and I am still thinking that I should put 7812 and 7912 in instead of those power zeners. So now there are 4 secondarys, one AUX and one primary on one trafo. I will do so more tests, but so far everything works. I just love how AUX can power SG and IR from main trafo so that I don't have to have additional 50Hz transformer on board.

Last and probably final schematic:

Schematic in PDF
PCB in PDF

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Application Note on bridging audio amplifiers

A discussion on bridging audio amplifier circuits like LM3886. Includes a schematic to drive a matched pair of amplifiers in a bridged configuration, power supply considerations for LM3886 and TDA1514 power amplifier circuits-especially in bridged pairs.

Application Note on parallel-bridging LM3886 audio amplifiers

How to make it loud - real loud. (230 watts rms into 8 ohms without clipping from 4 ICs. How to match LM3886s for parallel operation, then bridge the matched parallel banks. If you are not familiar with bridging amplifiers (BTL configuration), read the Application Note on bridging listed left in article Application Note on bridging audio amplifiers.

My first car audio system My second car audio system My 3rd car audio system
Click HERE or to My Projects to see what I did for myself

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