Anti-theft alarm device connected with power adapter
The embodiment of the invention provides an anti-theft alarm device connected with a power adapter. The anti-theft alarm device is connected with a power adapter and comprises: a connecting circuit used for inputting power supply voltage of the power adapter; a power supply circuit connected with th...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The embodiment of the invention provides an anti-theft alarm device connected with a power adapter. The anti-theft alarm device is connected with a power adapter and comprises: a connecting circuit used for inputting power supply voltage of the power adapter; a power supply circuit connected with the connecting circuit and used for converting the power supply voltage into a first voltage and a second voltage; and a control circuit connected with the power supply circuit and used for working according to the first voltage, judging whether the power supply voltage is normally input into the connecting circuit according to the second voltage, and giving an alarm if the power supply voltage is not normally input into the connecting circuit. According to the invention, the anti-theft alarm device connected with the power adapter is connected with the power adapter, and when the voltage adapter is disconnected with the anti-theft alarm device, the alarm signal is generated, so that the problem that in the prior art |
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