It is my first time for a novice to draw a circuit. I hope you can give me some advice. U1 is a touch chip, and U2 is an audio switching chip. The principle is very simple. U1 outputs a level change after being touched, and U2 switches the audio channel according to the level.
Please see the attachment for the specific chip PDF document.
Now there are two problems: 1. The audio signal input cannot be too large, otherwise there will be interference in the output. I don’t know what’s going on. I hope some experts can solve this problem.
2. Originally, the tail of the pig should be connected to the third pin of U1, but I don’t know how to apply copper in the picture, and the picture is too small on the PCB. (I’m a beginner, it’s funny.)
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