CN202816069U - Voltage-controlled type anti-theft alarm - Google Patents
Voltage-controlled type anti-theft alarm Download PDFInfo
- Publication number
- CN202816069U CN202816069U CN 201220268508 CN201220268508U CN202816069U CN 202816069 U CN202816069 U CN 202816069U CN 201220268508 CN201220268508 CN 201220268508 CN 201220268508 U CN201220268508 U CN 201220268508U CN 202816069 U CN202816069 U CN 202816069U
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- Prior art keywords
- resistor
- alarm circuit
- integrated alarm
- transistor
- diode
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Abstract
The utility model discloses a voltage-controlled type anti-theft alarm. The voltage-controlled type anti-theft alarm comprises a power supply circuit, an alarm integrated circuit, a first transistor, a second transistor, a light-emitting diode, an anti-theft switch, a diode, a capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor and a speaker. The alarm voice is stored in an integrated circuit chip, so as to remind people to avoid being stolen. The voltage-controlled type anti-theft alarm has the advantages of simple circuit structure, stable performance and convenient installation and debugging.
Description
Technical field
The utility model relates to a kind of burglar alarm, relates in particular to a kind of pressure-controlled burglar alarm.
Background technology
At present, being used for the valuables such as family's televisor, computer and all being all is not install antitheftly, causes like this and is easy to be stolen by the thief, causes article stolen at night owing to people's carelessness, causes people to incur loss.
Summary of the invention
The purpose of this utility model provides a kind of pressure-controlled burglar alarm with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises power circuit, integrated alarm circuit, the first transistor, transistor seconds, light emitting diode, anti-theft switch, diode, capacitor, the first resistor, the second resistor, the 3rd resistor, the 4th resistor and loudspeaker, the first end of described the first resistor respectively with the cathode output end of described power circuit be connected the first end of loudspeaker and be connected, the second end of described the first resistor respectively with the electrode input end of described integrated alarm circuit, the negative pole of described diode, the first end of described capacitor be connected the electrode input end of integrated alarm circuit and connect, the signal output part of described integrated alarm circuit is connected with the positive pole of described light emitting diode, the negative pole of described light emitting diode is connected with the first end of described the 4th resistor, the low triggering end of described integrated alarm circuit is connected and is connected with the high-triggering end of described integrated alarm circuit behind described the second resistor, the signal input part of described integrated alarm circuit is connected and is connected with the base stage of described the first transistor behind described the 3rd resistor, the control end of described integrated alarm circuit is connected with the first end of described anti-theft switch, the collector of described the first transistor respectively with the first end of described loudspeaker be connected the collector of transistor seconds and be connected, the emitter of described the first transistor is connected with the base stage of described transistor seconds, the emitter of described transistor seconds respectively with the second end of described anti-theft switch, the negative input of described integrated alarm circuit, the second end of described the 4th resistor, the second end of described capacitor, the positive pole of described diode be connected the cathode output end of power circuit and connect.
The beneficial effects of the utility model are:
The utility model stores a kind of alarm voice in integrated circuit (IC) chip, remind people antitheft; The utlity model has that circuit structure is simple, stable performance and Installation and Debugging advantage easily.
Description of drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model comprises power circuit, integrated alarm circuit IC, the first transistor VT1, transistor seconds VT2, LED, anti-theft switch SB, diode VD, capacitor C, the first resistor R1, the second resistor R2, the 3rd resistor R3, the 4th resistor R4 and loudspeaker BL, the first end of the first resistor R1 is connected first end with the cathode output end of power circuit respectively and is connected with loudspeaker BL, the second end of the first resistor R1 respectively with the electrode input end of integrated alarm circuit IC, the negative pole of diode VD, the first end of capacitor C is connected electrode input end and is connected with integrated alarm circuit IC, the signal output part of integrated alarm circuit IC is connected with the positive pole of LED, the negative pole of light emitting diode LED is connected with the first end of the 4th resistor R4, the low triggering end of integrated alarm circuit IC is connected and is connected with the high-triggering end of integrated alarm circuit IC behind the second resistor R2, the signal input part of integrated alarm circuit IC is connected and is connected with the base stage of the first transistor VT1 behind the 3rd resistor R3, the control end of integrated alarm circuit IC is connected with the first end of anti-theft switch SB, the collector of the first transistor VT1 is connected collector with the first end of loudspeaker BL respectively and is connected with transistor seconds VT2, the emitter of the first transistor VT1 is connected with the base stage of transistor seconds VT2, the emitter of transistor seconds VT2 respectively with the second end of anti-theft switch SB, the negative input of integrated alarm circuit IC, the second end of the 4th resistor R4, the second end of capacitor C, the positive pole of diode VD is connected cathode output end and is connected with power circuit.
Claims (1)
1. pressure-controlled burglar alarm, it is characterized in that: comprise power circuit, integrated alarm circuit, the first transistor, transistor seconds, light emitting diode, anti-theft switch, diode, capacitor, the first resistor, the second resistor, the 3rd resistor, the 4th resistor and loudspeaker, the first end of described the first resistor respectively with the cathode output end of described power circuit be connected the first end of loudspeaker and be connected, the second end of described the first resistor respectively with the electrode input end of described integrated alarm circuit, the negative pole of described diode, the first end of described capacitor be connected the electrode input end of integrated alarm circuit and connect, the signal output part of described integrated alarm circuit is connected with the positive pole of described light emitting diode, the negative pole of described light emitting diode is connected with the first end of described the 4th resistor, the low triggering end of described integrated alarm circuit is connected and is connected with the high-triggering end of described integrated alarm circuit behind described the second resistor, the signal input part of described integrated alarm circuit is connected and is connected with the base stage of described the first transistor behind described the 3rd resistor, the control end of described integrated alarm circuit is connected with the first end of described anti-theft switch, the collector of described the first transistor respectively with the first end of described loudspeaker be connected the collector of transistor seconds and be connected, the emitter of described the first transistor is connected with the base stage of described transistor seconds, the emitter of described transistor seconds respectively with the second end of described anti-theft switch, the negative input of described integrated alarm circuit, the second end of described the 4th resistor, the second end of described capacitor, the positive pole of described diode be connected the cathode output end of power circuit and connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268508 CN202816069U (en) | 2012-06-08 | 2012-06-08 | Voltage-controlled type anti-theft alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268508 CN202816069U (en) | 2012-06-08 | 2012-06-08 | Voltage-controlled type anti-theft alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202816069U true CN202816069U (en) | 2013-03-20 |
Family
ID=47874915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220268508 Expired - Fee Related CN202816069U (en) | 2012-06-08 | 2012-06-08 | Voltage-controlled type anti-theft alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202816069U (en) |
-
2012
- 2012-06-08 CN CN 201220268508 patent/CN202816069U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20130608 |