Traditional Chinese Practical Walkman Multifunction Headset: Circuit Design, Parts List & Workshop Prototype Guide

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In short: Traditional Chinese Practical Walkman Multifunction Headset. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 1267 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.

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Walkman multifunctional headphonesFigure 148 shows the principle circuit of a functional earphone, in which the IC is TA7666P. It uses a voltage-controlled display and will not affect the sound quality of the earphone. The LED in the picture can also be replaced with an LCD display, which may increase the power consumption of the Walkman.Figure 148This headset uses voltage-controlled resistors VT1 and VT2 to control the volume. …

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