| 摘要 |
Anti-theft alarm for mopeds which comprises movement sensors powered from a battery, circuits for timing, oscillation and amplification, and an audible warning device, such that, when the moped is moved, the timer circuit is connected which in turn maintains the connection to the battery of all the circuitry, in turn supplying a stable oscillator which switches the operation of an audible-frequency oscillator, connecting the latter by means of a power stage to an acoustic warning device. <IMAGE>
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