Traditional Chinese Practical Alarm Device: Circuit Design, Parts List & Workshop Prototype Guide
In short: Traditional Chinese Practical Alarm Device. 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 21136 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
Multifunctional alarm for carsAt present, there are many types of anti-theft alarms used in cars, and their functions are relatively simple. Most of them only have an alarm function when the car door is opened, and cut off the ignition circuit to prevent the car from starting. It is precisely because many car anti-theft alarms cannot provide the protection they should have that cars began to install anti-theft nets to separate passengers and drivers to prevent accidents. Although it has a certain effect, it is not effective, unsightly, and causes discomfort to passengers. At the same time, the installation price is relatively expensive.To this end, we designed and tested the "Multifunctional Alarm for Cars", which has a unique and ingenious circuit structure, uses fewer components, is low in cost, and has strong practicability. …
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