Two-channel audio signal conditioning circuit

Two-channel audio signal conditioning circuit

Shown is the circuit diagram of a stereo adapter. It can be seen that the connection terminal (signal input) is connected to the volume adjustment potentiometer (with
power switch function) to input the sound signal. Shielded wires are used to connect them. The purpose of this is to protect the signal from external interference.
    The connection between the volume adjustment potentiometer and the circuit board uses ordinary wires. This machine uses two 1.5 V batteries as the power supply
. One end of the battery is connected to the volume adjustment potentiometer through a power cord, and the power cord and the shielded wire connecting the terminal are bundled
together . The purpose of this This prevents long wires from being scattered inside the machine, making the inside of the machine look beautiful and tidy, and also makes it
easier to identify the wiring diagram. The other end of the power supply is connected to the circuit board via a power cord .