Traditional Chinese Three-function electronic appliance: Circuit Design, Parts List & Workshop Prototype Guide

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In short: Traditional Chinese Three-function electronic appliance. 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 1813 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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Three-function electronic applianceThe circuit is shown in Figure 126. R2, R3, and C2 form a controlled audio oscillator controlled by the NE555 strong reset pin ④. When switch S2 is turned on, C1 and C2 are connected in parallel and become a controlled low-frequency oscillator with an oscillation frequency of about 1Hz.(1) Eye sleep wake-up function for deaf-mute peopleX is the electronic alarm clock contact piece. Normally, the contact piece When the wake-up time comes, X is closed, making the ④ pin of NE555 at a high level, and the ③ pin outputs a square wave pulse. …

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