Traditional Chinese Radio Jujube Deaf Hearing Aid Dual Use Machine (Workshop Practice) — Circuit, Wiring & Debug Guide

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In short: Traditional Chinese Radio Jujube Deaf Hearing Aid Dual Use Machine (Workshop Practice) — Circuit, Wiring & Debug Guide. 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 1754 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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Radio Zao hearing aid dual-purpose machine for deafnessRadio Zao hearing aid dual-purpose machine for deafness, the circuit diagram is shown in Figure 107. Its high and low frequency circuits all use integrated circuits, and their models are YS414 and LM386 respectively. This dual-purpose machine has the advantages of stable and reliable operation, small size, and simple installation and adjustment.Figure 107In Figure 107, S1 is the radio and hearing aid selection switch. If S1 is turned to the left end (i.e., the position shown in the figure), it is the radio working state; if S1 is turned to the right end, it is the hearing aid position. The gain of IC1 (YS414) miniature radio integrated circuit can reach 72dB. The normal working voltage is 1. 1-1.9V, …

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