5v Amplifier for speakers

I was wondering if it was possible for me to make a circuit which would amplify a stereo audio signal for use with small speakers using a 5v current... I have a couple of speakers, a spare TDA2822 chip and I have access to other basic resources... I found a diagram (attached) except I don't know what the symbols and notation such as "C1 - 1uF" and "VR1 - 10K Lin" mean... Could you help me???

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jvdberg@ieee.org over 12 years ago

Will, TDA2822 can be used for this purpose. This circuit will work with supply voltages down to 3.3 Volt. At 4.5 Volt supply you will have 0.32 Watt per channel into a 4 Ohm speaker. 1 Watt output power is available when the IC is connected in a bridge configuration. (See the schematic in the datasheet.) In that case you need a TDA2822 for the left channel and a second TDA2822 for the right channel. At 5 Volt you will have a little more output power. The symbols and notation such as "C1 - 1uF are the external components you need to operate this IC. VR1 and VR2 are the volume control potmeters. You will probably need one stereo potmeter for VR1 and VR2.
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Former Member over 12 years ago in reply to jvdberg@ieee.org

Hi, thanks for the speedy reply,

I do have a spare potmeter which clicks to turn the device on and has 3 furthur terminals for the volume control, however how would the 3 terminals wire up to the schematic so that I could adjust the volume? Would 5v provide enough power to provide an reasonable volume through two 4 Ohm / 1.5w speakers? I am also wondering if the TDA2822 capable at running at 12v also because that is my second option...

It looks something like this:
http://upload.wikimedia.org/wikipedia/commons/b/b5/Potentiometer.jpg
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bad_boy_y over 12 years ago in reply to Former Member

for connect your potmeter the arrow is always the center pin and the other can be switch.
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Former Member over 12 years ago in reply to bad_boy_y

So the rectangle isn't actually a resistor as I guessed it was?
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jeffclough over 12 years ago

Will,
This might also be helpful, just because it's nice to have some theory with practice (though I'm not much of an audio guy):
http://www.sengpielaudio.com/calculator-AmplifierLoudspeakerAndOhm.htm

--Jeff
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Former Member over 12 years ago in reply to jeffclough

So that means that even though the chip gives about 1ohm it would be fine to hook it up to two 1.5ohm speakers... (Sorry If I am being incredibley thick...)
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jvdberg@ieee.org over 12 years ago in reply to Former Member

TDA2822 is capable running at supply Voltages between 3 Volt and 15 Volt.
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