Traditional Chinese Motorcycle anti-theft alarm: Circuit Design, Parts List & Workshop Prototype Guide
In short: Traditional Chinese Motorcycle anti-theft alarm. 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 9398 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
motorcycle anti-theft alarmWith the rapid development of the national economy and the continuous improvement of people's lives, motorcycles have entered a large number of families and become an indispensable means of transportation for some people.Motorcycles are high-end household products. How to prevent motorcycles from being stolen is a matter of great concern to car owners. For this reason, various types of motorcycle anti-theft locks have emerged. However, motorcycles are still being stolen frequently. Higher-end motorcycle anti-theft locks are difficult to destroy in a short period of time, so thieves move the motorcycles onto other vehicles and steal them. In this way, even the most advanced anti-theft locks are powerless. In view of the above, we designed and tested the "Motorcycle Anti-Theft Alarm", which is introduced below for reference by manufacturers or enthusiasts when making their own products.1. Circuit working principleThe circuit schematic diagram of the motorcycle anti-theft alarm is shown in Figures 3-1 and 3-2.Figure 3-1Figure 3-2The alarm circuit shown in the figure is composed of a power switch circuit and an alarm sound circuit. Among them, K1, K2, K3, one-way thyristor SCR1 and relay J1 form the power switch circuit; BG1, BG2, relay J2 (or one-way thyristor SCR2) and motorcycle horn Y form the alarm sounding circuit. The alarm sounding circuit is a self-excited multivibrator. By adjusting the frequency of the oscillator, the motorcycle horn can emit alarm sounds of different lengths.When in the alarm state, the power switch K1 of the alarm is in the on position, and K2 or K3 are in the off position. …
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Lei Cheng
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