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    Use TDA2822 to receive the machine to increase the volume in DM500 ----- TDA2822 AMPLIFIER

     

    Use TDA2822 to receive the machine to add the machine to the DM500, TDA2822 AMPLIFIER Keywords: TDA2822, magnifying circuit The author purchased the DM500 machine has two or three years, and various versions of the system are often brushed. However, the problem with small volume volume is never cured. The machine did not design the power amplifier circuit. Therefore, the audio output power is too small. Decide fundamentally solve this problem - add the power amplifier circuit in the machine. Recently, a TDA2822M finished amplifier board has been taken from the Internet, only 3.5 yuan, great value, circuit diagram is quite simple. Take a total of 14 yuan. The TDA2822M operating voltage is 3V to 15V, while the DM machine uses a 12V power supply. Therefore, the power platen power supply can be directly attached to the DM motherboard. The board does not design a volume potentiometer, which can be adjusted by the remote control to control the DM volume output. The author is to consider minimizing damage and simplifying the installation, the author does not process the DM's output terminal, and uses the audio line of the lotus head to directly weld the audio output of the amplitude plate audio output. It is also very convenient. The power amplifier plate is very compact, and the welding surface can be attached to the machine with hot melt adhesive. After the transformation, the test machine, the sound is flooded. Decreated the expected results. Author: Zheng Yong Jie

     

     

     

     

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