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Topic: Tiny amplifier (Read 2796 times) previous topic - next topic

Nick Gammon

I read about the LM4889 at the Modern Device website, so I decided to try to make up my own. Soldered the chip onto a breakout board (not an easy task):



Breadboarded up the rest (need a couple of decoupling caps, a coupling capacitor for the input, and a feedback loop to adjust the volume):



Sounded pretty good out of an old speaker I had lying around. Not particularly loud, but probably fine for headphones.

Could be useful for adding audio output to a project.
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

cjdelphi

pam8403

http://www.ebay.com.au/sch/i.html?_odkw=audio+amplifier&_sop=15&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=pam8403&_sacat=0


I ordered a couple of audio amplifiers, the breakout boards run on 5v (I presume the IC's do too, perfect for Arduino Projects), here's the board I got, only a couple of bucks all up, I soldered on the legs and hooked it up, sounds really impressive!



If not for the fact I've since disassembled it, i'd upload a video showing it off (both right and left channels)

infact!

https://www.youtube.com/watch?v=cUVCakYjraY

just watch someone elses lol


cjdelphi

http://pdf1.alldatasheet.com/datasheet-pdf/view/246505/PAM/PAM8403.html

for the datasheet.... 

retrolefty

Wimps:

http://www.ti.com/lit/ds/symlink/lm3886.pdf

Lefty

cjdelphi

Voltage Supply 84V :O  LM3886 

Um, I'd rather not lol

retrolefty


Voltage Supply 84V :O  LM3886 

Um, I'd rather not lol


Yea, better leave that to us big boy pants guys.  ;)

Lefty

Nick Gammon


pam8403

I ordered a couple of audio amplifiers, the breakout boards run on 5v (I presume the IC's do too, perfect for Arduino Projects), here's the board I got, only a couple of bucks all up, I soldered on the legs and hooked it up, sounds really impressive!



That looks cool. Not sure about this though:

Quote

This item is located overseas where power plugs may differ.


Still, I ordered a couple. I'll sort out the power plugs when it arrives. :P
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

Nick Gammon

Shipping charges were reasonable, too. :)
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

Jack Christensen


Wimps:

http://www.ti.com/lit/ds/symlink/lm3886.pdf

Lefty


What a difference an "8" makes :D  ... inexpensive, too.

Back on the other end of the spectrum, these look interesting, if I could manage to solder one...
http://www.maximintegrated.com/datasheet/index.mvp/id/7413
MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

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