Security device utilizing the electronic components of an electronic gadget to produce an alarm

An anti-theft device for an electronic gadget, comprising:

• a security sensor configured to be attached to the electronic gadget;
• an electric circuitry disposed within the security sensor, the electric circuitry configured to generate a predefined security heartbeat signal having a predefined frequency;
• an electric cable having a first end coupled to the security sensor and a second end configured to be coupled to a port of the electronic gadget thereby establishing a wired connection between the security sensor and the electronic gadget, wherein the security sensor is configured to transmit the predefined security heartbeat signal generated by the electric circuitry of the security sensor to the electronic gadget via the wired connection, and wherein a software application running on the electronic gadget is configured to detect the predefined security heartbeat signal and verify that the predefined security heartbeat signal being received by the electronic gadget has the predefined frequency;
• and
• wherein, responsive to a failure to detect the predefined security heartbeat signal having the predefined frequency, the software application is configured to transition the electronic gadget into an alarm state, thereby causing one or more electronic components of the electronic gadget to output an audio alarm, a visual alarm, a wireless signal, or a combination thereof.