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TDA2030 IDENTIFYING AUDIO INPUT

TieBravo

Sep 18, 2022
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IMG_20220918_133333.jpgPicsArt_09-18-01.46.46.jpgScreenshot_2022-09-18-15-05-10-78_99c04817c0de5652397fc8b56c3b3817.jpgI found this unused amplifier board made of 3 TDA2030, but i can not understand the audio input. From the left you can see usb output, speaker output, Volume control. So where is the stereo input?

I am suspecting that this might be a mono board with subwoofer (top right), treble and midrange outputs.

How can i connect stereo aux and volume control at the same time.IMG_20220918_144353.jpg
 

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kellys_eye

Jun 25, 2010
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Usual practice is to apply each channel via resistors/capacitors and 'sum' the left-right signal to create a mono source.
 

davenn

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Sep 5, 2009
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. So where is the stereo input?

one trick is to look at the pin outs for the TDA2030 on its datasheet and work back from there :)
It shows pin 1 as the input via various resistors and capacitors depending on it's use
on your component side photos, pin 1 is the left hand pin
 

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kellys_eye

Jun 25, 2010
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The OP's own schematic shows the input. The terminals identified for the volume control are listed - left-to-right - as;

Ground
Middle pin
Audio in.

The audio 'in' is the mono (or pseudo-stereo via combining resistors) input signal.
 
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