Alarm circuit and manufacturing method thereof

Abstract

The invention discloses an alarm circuit which comprises a resistor R1, resistor R2, resistor R3, a capacitor C1, a diode D1, a diode D2, a triode Q1, a switch S and an alarm device. The alarm circuit is characterized in that the input port of the alarm device is electrically connected with the collector of the triode Q1; the collector of the triode Q1 is further connected with the positive electrode of the diode D2; the negative electrode of the diode D2 is connected with the ground; the diode D2 is a light emitting diode; the base of the triode Q1 is connected with each of one end of the resistor R3 and the negative electrode of the diode D1; the emitter of the triode Q1 and the other end of the resistor R3 are both connected with the ground; the diode D1 is a voltage stabilizing diode; the positive electrode of the diode D1 is connected with each of one end of the resistor R2, one end of the switch S and one end of the capacitor C1; the other end of the resistor R2 is connected with a 5V power supply; the other end of the switch S is connected with the ground through the resistor R1; the other end of the capacitor C1 is connected with the ground.

Description

technical field [0001] The invention relates to the security field, in particular to an alarm circuit and a manufacturing method thereof. Background technique [0002] The emergency alarm device is a device used to trigger the alarm in time when an emergency occurs. It is usually installed in banks, office buildings, shopping malls, elevators and other places. At present, with the increase of automobiles, incidents such as automobile breakdowns, accidents, and automobile robbery continue to occur, and more and more car owners begin to install emergency alarm circuits on their cars. However, at present, the emergency alarm circuit on the car is usually composed of a button switch and a buzzer. Although it can generate an alarm sound to scare off the robbers, it cannot send an alarm signal to the relevant rescue center in time when the car breaks down or has an accident. Once a dangerous situation occurs, it is difficult to get timely rescue, and the alarm button is simple an...

AI Technical Summary

Problems solved by technology

However, at present, the emergency alarm circuit on the car is usually composed of a button switch and a buzzer. Although it can generate an alarm sound to scare off the robbers, it cannot send an alarm signal to the relevant rescue center in time when the car breaks down or has an accident. Once a dangerous situation occurs, it is difficult to get timely assistance, and the alarm button is simple and easy to misuse

Images