Integrated circuit design with strong signal tracking capability

　　The integrated circuit signal tracker circuit is simple, and only needs a low-power integrated amplifier circuit LM386 and 5 capacitors to form the whole machine, and the tracking ability is extremely strong. From the tuning circuit to the power amplifier circuit, the fault can be easily detected. Because of the loud sound, when checking the middle and low-power circuits, the speaker can also be used to play the sound, without the need to always wear headphones, which is very convenient to use.

　　The circuit principle is shown in the figure above. Cl is a DC blocking capacitor; C2 is an output capacitor; C3 is used to prevent self-excitation; C4 is a power supply filter capacitor.

　　The signal is input from the 3rd pin of the integrated circuit LM386 through Cl. Since the input end of LM386 is biased by micro-current and has a wide frequency response, detection can be completed without an external diode. The signal is amplified and output from the 5th pin of LM386. The 1st and 8th pins of LM386 are gain controls. The highest gain can be obtained by directly connecting the two pins with a 10μF capacitor.

　　Is this super simple integrated circuit signal tracker circuit design to your liking? If anyone has DIYed it, I hope you can share the production process and experience with everyone!