LM3886 Stereo Amp DIY

lm3886 power amp diy

This is a simple project by National Semiconductor’s LM3886 power amplifier chip. I bought the chips and did some research online. The typical circuit is so simple. A single channel can easily reside on a small circuit board (see above).

With less than 10 additional passive components, the project is done.

LM3886 power amp circuitPin assignment of LM3886.

lm3886-pin-assignmentI just duplicated the first channel and made a stereo power amplifier. The two power chips are mounted on a single head sink. Don’t forget to put insulation on the heat skin of the two chips to prevent any unnecessary short circuit or surprise.

power amp diy

The power supply is a simple one. Just a 200V 5A bridge rectifier mounted on the case of the amplifier.

diy power supply power amp

For the capacitor bank, I searched through my component drawer and found six 3300uF caps. Parallel them and it is done.

diy power amp

Put them together and stuffed in a compact case.

stereo power amp

It is done!

diy stereo power amp 2

Put it beside my modified X-10D. I chose a blue LED as its power indicator. Quite cool.

diy stereo power amp

I still have a pair of brand new LM3886 chips with me. I don’t think I will use them. If you want to build the same project, please leave a comment to this post. I will mail them to you.

<2013 Jan 22> The two chips have been reserved to Jon. He posted the first comment. I will mail the chips to him.

LM3886 Chip Amp

4 thoughts on “LM3886 Stereo Amp DIY

  1. Jon F
    January 20, 2013 at 1:52 am

    great project & great offer…..

    1. Daddiest Daddy
      January 20, 2013 at 9:51 pm

      Thanks for reading my post. I will send you the chips in a few days.

    2. Daddiest Daddy
      January 23, 2013 at 3:32 pm

      The LM3886 chips are on their way to Jon.

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