This is TDA2822 small stereo power amplifier.

People like TDA2822. Me too.




  • Dual Amplifiers in one DIP-8 similar for   LM368. 
  • Give power watts at 1W + 1W at 4 ohms   speakers.
  • It is enough. We are happy Listening in our  corner.
  • Start voltage supply of 1.8V to 15V. The wide a lot.
  • Save energy with only 6mA, Min.
  • The bandwidth expansion rates at 40dB 120kHz.
  • Cheap and easy to use 

Note:

You can read more datasheet below.
It is a great idea.
You test the Arduino as a midi player. But its output is too weak.
You should increase the sound louder.
The TDA2822 is a 5V audio amplifier to this. It is one of a low voltage amplifier that is easies in the stereo system too.
Did you try it? You may like it same me. I will show you the TDA2822 Stereo amplifier project with PCB.


TDA2822 Stereo amplifier circuit working

Look at the circuit diagram. It is a stereo system. Both channels are the same.

To begin with, the 9V from power supply—battery goes to the circuit. And, C3 is a filter capacitor to keep this voltage is more stable. When sound is too fluctuating.

Then, the stable voltage flows pin 2(Vcc) of IC1. And, negative voltage connects to GND of the circuit.

Both input signals left and the right pass VR1 and VR2. To adjust the volume of the music.

And, these capacitors C1 and C2 keep circuit stability and block DC voltage.

Next, the signal flows to inputs pin7,8 and pin 6,5 in sequent.

The circuit inside IC runs, It amplifies more power of sound.

The stronger signals come out of pin 1 (left output) and pin 3 (right output).

Also, C8 and C9 are the output capacitors to coupling the strong signals to the speakers.

And both The C6, R1 and C7, R2 reduce noise to the output.

The components list

IC1: TDA2822_DUAL POWER AMPLIFIER
Electrolytic capacitors
C1, C2: 100μF 16V
C3: 100μF 16V
C4, C5: 470μF 16V
Polyester capacitors
C6, C7: 0.1μF 50V
VR1, VR2: 50K_Potentiometer
B1: 3V to a 9V battery Or 9V power supply circuit
Speaker 4Ω

Note:
My friend asks me how to connects the potentiometer to this project.


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