a POWER METER for a 2x22 WATT AUDIO AMPLIFIER

Thread Starter

kaname08

Joined Sep 22, 2010
37
i am just new here and hope you could help me,pls,,,

i am a 2nd year BSECE student,,,,,

i have a project,a power meter connected to the 2x22 watt audio amplifier,, last week i had already able to test it and it worked,but then just this tuesday,the power meter did not emittesd a light,however the amplifier still works(still produces the needed sound),,

this is where the diagrams for the two is:

http://freecircuitdiagram.com/2008/09/13/audio-power-meter-show-audio-amplifier-actual-output-power/

and

http://www.circuitstoday.com/tag/2-x-22-watt-stereo-amplifier-using-ic-tda-1554

pls do help pls,,
 

Thread Starter

kaname08

Joined Sep 22, 2010
37
oops i'm sorry about now i understand ,in opening a new project i need to make a new thread,thank you,,

i am using a power supply for that,12V,,
 

Audioguru

Joined Dec 20, 2007
11,248
The datasheet for the TDA1554 shows that its output power for each bridged channel is only 8.4W into 4 ohms at clipping (low distortion) or 5W into 8 ohms.

Its output power is 22 Whats per bridged channel into 4 ohms when the supply is 14.4V and the input level is much too high so the amplifier is clipping badly and making a horrible-sounding 10% distortion. At clipping it is 17 watts.
 
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