2 USB audio amplifier

Simple amplifier circuit suitable for speakers that can be directly connected to your laptop or computer. The power source is a 5V coming from USB port. The amplifier IC used is TDA2822M of ST Microelectronics.

Part List:
R1, R2 - 10 kilo ohms 1/4W
R3, R4 - 4.7 ohms 1/4W
C1, C2 - 100uF electrolytic capacitor
C3, C4 - 470uF electrolytic capacitor
C5, C6 - 0.1uF electrolytic capacitor
C7 - 10uF electrolytic capacitor
SR, SL - 8 ohms speaker
IC - TDA2822M dual low voltage audio amplifier



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2 comments:

  1. AnonymousDecember 21, 2011 at 2:03 AM

    Is the signal input for the amplifier taken from the same USB from pins(2 and 4) or should separately be taken from the headphone jack of the pc..?

    ReplyDelete
  2. DH-gmDecember 27, 2011 at 7:04 PM

    Audio signal is taken from separate audio jack. The use of USB is for power source only

    ReplyDelete

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