Any audio booster circuits or kits out there?

[matto1kute]

Hey guys just been looking into audio boosters. Does anyone have a circuit for one or know where i can get a kit for one? Obviously im after the type that boosts low signals/sounds but doesn't blast your ears off with larger targets/sounds. Just dont want to sped $158 on one from ebay :/

[homefire]

This is a Cool Easy Circuit.

[kt315]

stereo or mono? something from low power 1... 0.5 watt pop up micros...
http://www.ebay.com/itm/TDA2822M-1W-...gAAOSw9GhYc5i7
http://www.ebay.com/itm/LM386-Super-...MAAOSw5cNYRnVR

[matto1kute]

Awesome thanks guys. I will experiment soon. Seems very simple...almost too simple

[Davor]

It may get even simpler if you have any audio transformers from old discarded receivers.

[kt315]

[matto1kute]

Kt315 do u know where this circuit is from?

[kt315]

from http://radio-house.ucoz.ru/index/prostoj_megafon/0-297
actually this is typical circuit for LM386.

[kt315]

http://chemelec.com/Projects/Amp-LM386/LM386.htm

[homefire]

Gotta Love the LM386 ! Simple to use for sure.

[Xtrem]

This is a Cool Easy Circuit.



[ATTACH]39491[/ATTACH]

I dont think this circuit is working correct, dc current is flowing thru the speaker..

[homefire]

LOL, Of Course it is. How do you think the speaker would make sound? It follows the source signal. Trust me ! It works better then fine.. Read the document. It was produced commercially for years.

[matto1kute]

Just to double check. This will raise lower sounds while not blowing my ears of with the louder ones?

[Xtrem]

LOL, Of Course it is. How do you think the speaker would make sound? It follows the source signal. Trust me ! It works better then fine.. Read the document. It was produced commercially for years.

LOL...SORRY ,i trust you, , the critical point is the supply voltage (1.5 VDC) it must be working.

[homefire]

Yes it limits the Blast. Works some what like a Compander circuit. https://en.wikipedia.org/wiki/Companding