Comments on: Portable Audio Amplifier

By: shiroou

shiroou — Fri, 01 Jan 2016 23:40:00 +0000

I got no sound on pin2/3

By: Gedi albert

Gedi albert — Thu, 04 Jun 2015 07:15:34 +0000

I Like

By: damas felix

damas felix — Fri, 16 Nov 2012 11:13:44 +0000

sorry am diploma student in electronics i want to do portable amplifier as my project plz can u help for giving detail information and calculations of voltage;power;current etc?

By: YIME

YIME — Mon, 03 Sep 2012 10:45:29 +0000

I need to mono IC brand is rohm and function is 9 v5w but have a difficult is I don’t know what is the type and package, you can help me? See I have what kind of type is suitable for I use?

By: mildx

mildx — Fri, 20 Apr 2012 05:00:58 +0000

its realy work
now begin make the volume from input and on/off switch
i think the mono design for the bass and stereo design for the treble

By: circuit diagram

circuit diagram — Sun, 12 Feb 2012 21:57:39 +0000

In reply to brian. of course it is resistor...

By: brian

brian — Sun, 12 Feb 2012 18:35:16 +0000

what is the blue rectangle with 47k symbolizing?
is it a capacitor or a resistor???

By: Rajesh

Rajesh — Thu, 05 Jan 2012 13:44:29 +0000

Hi,
sir thanks,
It’s good runing.

By: circuit diagram

circuit diagram — Thu, 22 Dec 2011 17:02:47 +0000

In reply to Rajesh. - check the power supply - check the input signal, too weak signal makes low power output

By: Rajesh

Rajesh — Thu, 22 Dec 2011 14:43:29 +0000

HI,
I made this circuit run but volume is very low.how to increase the volume?
and i used o/p capacitor is 0.22,63v placed .15,16v