TEA 2025B audio amp

[michael_circuit]

Hello All,

I have successfully completed the schematic below and have one question. How do I integrate a potentiometer to control the volume?


https://sierateknik.blogspot.com/2010/12/mono-pa-with-tea2025b.html

 

[MikeMl]

What is the resistor between IN and Gnd? Likely something like 1K?

Make it a pot, with the wiper going to the left end of the input coupling cap connected to pin 10, bottom end grounded. You might want to add a second input coupling cap between IN and the top end of the pot, or not.

 

[audioguru]

Here is the original schematic and my schematic that shows a volume control:

 

[MikeMl]

Here is the original schematic and my schematic that shows a volume control:

And what is the end-to-end resistance of the pot?

 

[audioguru]

And what is the end-to-end resistance of the pot?

The datasheet for the TEA2025B amplifier says that the input resistance of the amplifier is typically 30k ohms so a 10k to 20k volume control will work fine.

 

[michael_circuit]

thank you all so much, it works great!