Practical Automatic Protector: Traditional Chinese Circuit Design Guide
In short: Traditional Chinese Practical Automatic Protector. 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 2086 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
automatic protectorPersonal protective equipment is highly versatile and very easy to use. As long as the arms and other human body parts enter the dangerous area of the electric machinery, the electric machinery will automatically stop working to protect personal safety.How it works:The circuit schematic is shown in Figure 208. In the figure, L, C1, C2 and VT1 form a capacitor three-point oscillator. By fine-tuning C1, the circuit can be made to oscillate. When the operator's arm is close to the induction piece, a human body capacitor C0 will be connected at the junction of C1 and C2, which will destroy the original oscillation condition of the oscillator, causing the oscillation to weaken or even stop. …
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