CN203689635U - Novel computer burglar alarm circuit - Google Patents
Novel computer burglar alarm circuit Download PDFInfo
- Publication number
- CN203689635U CN203689635U CN201420032836.5U CN201420032836U CN203689635U CN 203689635 U CN203689635 U CN 203689635U CN 201420032836 U CN201420032836 U CN 201420032836U CN 203689635 U CN203689635 U CN 203689635U
- Authority
- CN
- China
- Prior art keywords
- alarm circuit
- burglar alarm
- collector
- computer
- mercury cut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a novel computer burglar alarm circuit. The novel computer burglar alarm circuit is characterized in that an anode end of a 6V power supply is connected through a switch S, and a 100 [miu]F capacitor C1 is connected with the power supply in parallel and has an effect of filtering; another parallelly connected end is connected with an emitting electrode of a Q1, a collector electrode of the Q1 is connected to a speaker, and a base electrode is connected to a collector electrode of a Q2; and one more parallelly connected end is connected with a 3K resistor R1, and the resistor is connected with a mercury switch; a base electrode of the Q2 is connected between the resistor R1 and the mercury switch; and the other pole of the mercury switch, an emitting electrode of the Q2, the other end of the speaker and a cathode end of the C1 are connected to a cathode end of the power supply. A strong alarm can be emitted by the computer burglar alarm circuit when a computer is stolen, so that a good anti-theft function is provided.
Description
Technical field
This technology is mainly used in the warning on computer.This circuit structure is simple and practical, adopts the most basic circuit alarm principle, is loaded on computer, as long as a removable computer can send strong chimes of doom, can prevent computer stolen, and computer has been played to safe effect.
Background technology
On present society, steal computer event day by day savage.A lot of offenders take advantage of that people stays out or steal computer in some public place.And this circuit can play good warning effect on computer antitheft.
Summary of the invention
The purpose of this utility model is to provide a kind of New-type computer burglar alarm circuit.
The technical solution of the utility model is: a kind of New-type computer burglar alarm circuit, is characterized in that: the power positive end of 6V connects by switch S, and the capacitor C 1 of 100uF is in parallel with it, plays the effect of filtering.Another parallel connected end is connected to the emitting stage of Q1, and the collector of Q1 is connected to loudspeaker Speaker, and collector is connected to the collector of Q2.Another parallel connected end connects the resistance R 1 of 3K, and resistance connects again mercury cut-off.Between resistance R 1 and mercury cut-off, connect the base stage of Q2.Another utmost point of mercury cut-off, the transmitter of Q2, the other end of loudspeaker Speaker, the negative pole end of C1 is connected to the negative pole end of power supply together.
Whether the utility model mainly, by conducting and the cut-off of leading to and break to control triode Q2 of mercury cut-off, works thereby control loudspeaker.When switch S closure, under normal circumstances, mercury cut-off, in connected state, without pressure drop, in cut-off state, thereby makes Q1 also in cut-off state between the base stage of Q2 and emitter, and loudspeaker do not ring, and do not report to the police.When switch S closure, once mercury cut-off, in off-state, forms pressure drop between the base stage of Q2 and emitter, in conducting state, thereby make Q1 also in conducting state, loudspeaker work, starts to ring, in alarm condition.
The beneficial effects of the utility model are: can be stolen to computer time, send very strong chimes of doom, play good anti-theft function.
Accompanying drawing explanation
Fig. 1 is New-type computer burglar alarm circuit figure.In figure: 1. mercury cut-off; 2. loudspeaker Speaker.
Embodiment
The power positive end of 1. 1 kinds of New-type computer burglar alarm circuit: 6V of embodiment connects by switch S, and the capacitor C 1 of 100uF is in parallel with it, plays the effect of filtering.Another parallel connected end is connected to the emitting stage of Q1, and the collector of Q1 is connected to loudspeaker Speaker, and collector is connected to the collector of Q2.Another parallel connected end connects the resistance R 1 of 3K, and resistance connects again mercury cut-off.Between resistance R 1 and mercury cut-off, connect the base stage of Q2.Another utmost point of mercury cut-off, the transmitter of Q2, the other end of loudspeaker Speaker, the negative pole end of C1 is connected to the negative pole end of power supply together.
Switch S closure, mercury cut-off two is in on-state, and loudspeaker do not ring, and do not report to the police.
Switch S closure, mercury cut-off two is in off-state, loudspeaker work, loudspeaker start to send the very large sound, in alarm condition.
Claims (1)
1. a New-type computer burglar alarm circuit, it is characterized in that: the power positive end of 6V connects by switch S, the capacitor C 1 of 100uF is in parallel with it, play the effect of filtering, another parallel connected end is connected to the emitting stage of Q1, the collector of Q1 is connected to loudspeaker Speaker, collector is connected to the collector of Q2, another parallel connected end connects the resistance R 1 of 3K, resistance connects again mercury cut-off, between resistance R 1 and mercury cut-off, connect the base stage of Q2, another utmost point of mercury cut-off, the transmitter of Q2, the other end of loudspeaker Speaker, the negative pole end of C1 is connected to the negative pole end of power supply together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420032836.5U CN203689635U (en) | 2014-01-20 | 2014-01-20 | Novel computer burglar alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420032836.5U CN203689635U (en) | 2014-01-20 | 2014-01-20 | Novel computer burglar alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203689635U true CN203689635U (en) | 2014-07-02 |
Family
ID=51011512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420032836.5U Expired - Fee Related CN203689635U (en) | 2014-01-20 | 2014-01-20 | Novel computer burglar alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203689635U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112309090A (en) * | 2020-10-30 | 2021-02-02 | 柳州铁道职业技术学院 | Passenger car safety window breaking device with alarm function |
| CN112309087A (en) * | 2020-10-30 | 2021-02-02 | 柳州铁道职业技术学院 | Triggering type fuel tank cap alarm for automobile |
-
2014
- 2014-01-20 CN CN201420032836.5U patent/CN203689635U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112309090A (en) * | 2020-10-30 | 2021-02-02 | 柳州铁道职业技术学院 | Passenger car safety window breaking device with alarm function |
| CN112309087A (en) * | 2020-10-30 | 2021-02-02 | 柳州铁道职业技术学院 | Triggering type fuel tank cap alarm for automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20150120 |
|
| EXPY | Termination of patent right or utility model |