CN209460838U

CN209460838U - A kind of electronic password lock

Info

Publication number: CN209460838U
Application number: CN201920491788.9U
Authority: CN
Inventors: 温彩芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2019-10-01
Anticipated expiration: 2029-04-12

Abstract

The utility model discloses a kind of electronic password locks；The utility model electronic password lock includes AT89S51 main control chip, power input, keyboard input, reset circuit, password storage, crystal oscillating circuit, display circuit, warning circuit, switching circuit；The AT89S51 main control chip is respectively with power input, and keyboard input, reset circuit, password storage, crystal oscillating circuit, display circuit, warning circuit, the several parts of switching circuit connect；The power input uses the single-phase AC voltage that frequency is 220V for 50Hz, virtual value, connect with AT89S51 main control chip Vcc pin；Electronic password lock provided by the utility model has design simple, is easy to develop, at low cost, securely and reliably, it is easy to operate the features such as；It has both key effectively to prompt, input error prompt, the multiple functions such as Modify password, strong security, flexibility is high, is particularly suitable for using in family, office, students' dormitory and hotels and other places.

Description

A kind of electronic password lock

Technical field

The utility model relates to safety lockset field more particularly to a kind of electronic password locks.

Background technique

Currently, scientific and technological information is increasingly developed, personal air, the personal effects are increasingly valued by people, and are also A kind of inexorable trend of social development is to have very much in the level security of many important places or public place personal belongings Necessity carries out safeguard, thus designs a high security, and easy to operate, the coded lock that is easy to carry about with one is advantageous to people Life needed for.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art, provide a kind of electronic password lock, the technical side Case is achieved in that

A kind of electronic password lock includes AT89S51 main control chip, power input, keyboard input, and reset circuit, password is deposited Storage, crystal oscillating circuit, display circuit, warning circuit, switching circuit；The AT89S51 main control chip respectively with power input, keyboard Input, reset circuit, password storage, crystal oscillating circuit, display circuit, warning circuit, the several part connections of switching circuit；The electricity Source input uses the single-phase AC voltage that frequency is 220V for 50Hz, virtual value, connect with AT89S51 main control chip Vcc pin.

Further, the keyboard input uses matrix form key board, it is made of line and alignment, and key is located at row On the crosspoint of column, the password of coded lock is inputted by keyboard to be completed, and is connect with AT89S51 main control chip P1.0~P1.7 pin.

Further, the password storage stores password using EPROM chip AT24C02, with AT89S51 main control chip The connection of P3.5, P3.6, P3.7 pin.

Further, the reset circuit includes a switch key, and reset circuit is for keeping entire circuit system each Functional component is started to work all in a determining original state, and from this state, is drawn with AT89S51 main control chip RST Foot connection.

Further, the crystal oscillating circuit uses external crystal-controlled oscillation of the 12M Hz as system, with AT89S51 main control chip The connection of XTAL1, XTAL2 pin.

Further, the display circuit use liquid crystal display LCD1602, with AT89S51 main control chip P3.0~ The connection of P3.2, P0.0~P0.7, Vcc pin.

Further, the warning circuit includes piezoelectric ceramics sounding device and a triode, with AT89S51 master control core The connection of piece P2.1 pin Pin, and connect with peripheral circuit, sounding does not send out " stining " sound, often when a key is pressed after connection power supply It clicks, sounding is primary, and when password is correct, sounding is not unlocked directly, and when Password Input mistake, the P2.1 pin of single-chip microcontroller is Low level, triode ON buzzer beep alarm.

Electronic password lock provided by the utility model has design simple, is easy to develop, at low cost, securely and reliably, operation The features such as facilitating；It has both key effectively to prompt, input error prompt, the multiple functions such as Modify password, strong security, flexibility Height is particularly suitable for using in family, office, students' dormitory and hotels and other places.

Detailed description of the invention

The utility model is described in further detail with reference to the accompanying drawings and detailed description；

Fig. 1 is the utility model electronic coding lock system functional block diagram.

Fig. 2 is the utility model power supply input circuit figure.

Fig. 3 is the utility model keyboard input circuit figure.

Fig. 4 is the utility model password storage circuit diagram.

Fig. 5 is the utility model reset circuit figure.

Fig. 6 is the utility model crystal oscillating circuit figure.

Fig. 7 is the utility model display circuit figure.

Fig. 8 is the utility model warning circuit figure

Specific embodiment

As shown in Figure 1, a kind of revealed electronic password lock of the utility model, including AT89S51 main control chip, power supply are defeated Enter, keyboard input, reset circuit, password storage, crystal oscillating circuit, display circuit, warning circuit, switching circuit；The AT89S51 Main control chip respectively with power input, keyboard input, reset circuit, password storage, crystal oscillating circuit, display circuit, warning circuit, The several part connections of switching circuit；The power input uses the single-phase AC voltage that frequency is 220V for 50Hz, virtual value, with AT89S51 main control chip Vcc pin connection, as shown in Fig. 2, alternating voltage is converted to the 5V DC voltage of amplitude stability for being System uses.

When it is implemented, the keyboard input uses matrix form key board, it is made of line and alignment, and key is located at On the crosspoint of ranks, the password of coded lock is inputted by keyboard to be completed, and is connected with AT89S51 main control chip P1.0~P1.7 pin It connects, as shown in Figure 3.

When it is implemented, the password storage stores password using EPROM chip AT24C02, with AT89S51 main control chip The connection of P3.5, P3.6, P3.7 pin, as shown in Figure 4.

When it is implemented, the reset circuit includes a switch key, reset circuit is for keeping entire circuit system each A functional component is started to work all in a determining original state, and from this state, with AT89S51 main control chip RST Pin connection, as shown in Figure 5.

When it is implemented, the crystal oscillating circuit uses external crystal-controlled oscillation of the 12M Hz as system, with AT89S51 main control chip The connection of XTAL1, XTAL2 pin, as shown in Figure 6.

When it is implemented, the display circuit use liquid crystal display LCD1602, with AT89S51 main control chip P3.0~ P3.2, P0.0~P0.7, Vcc pin connection, as shown in fig. 7, display is just in after only pressing the unlatching key on lower keyboard Open state.

When it is implemented, the warning circuit includes piezoelectric ceramics sounding device and a triode, with AT89S51 master control The connection of chip P2.1 pin Pin, and connect with peripheral circuit, sounding does not send out " stining " sound when a key is pressed after connection power supply, Often clicking, sounding is primary, and when password is correct, sounding is not unlocked directly, when Password Input mistake, the P2.1 pin of single-chip microcontroller For low level, triode ON buzzer beeps alarm, as shown in Figure 8.

Embodiment is only one embodiment of the utility model, for those of ordinary skill in the art, is not being paid Under the premise of creative labor, other embodiments can also be obtained with reference to the accompanying drawings, also within protection scope of the present invention.

Claims

1. a kind of electronic password lock, it is characterised in that: including AT89S51 main control chip, power input, keyboard input resets electricity Road, password storage, crystal oscillating circuit, display circuit, warning circuit, switching circuit；The AT89S51 main control chip respectively with power supply Input, keyboard input, reset circuit, password storage, crystal oscillating circuit, display circuit, warning circuit, the several parts of switching circuit connect It connects；The power input uses the single-phase AC voltage that frequency is 220V for 50Hz, virtual value, with AT89S51 main control chip Vcc Pin connection.

2. electronic password lock according to claim 1, it is characterised in that: the keyboard input uses matrix form key key Disk, it is made of line and alignment, and key is located on the crosspoint of ranks, and the password of coded lock is inputted by keyboard to be completed, with The connection of AT89S51 main control chip P1.0~P1.7 pin.

3. electronic password lock according to claim 1, it is characterised in that: the password storage uses EPROM chip AT24C02 stores password, connects with AT89S51 main control chip P3.5, P3.6, P3.7 pin.

4. electronic password lock according to claim 1, it is characterised in that: the reset circuit includes a switch key, Reset circuit is connect with AT89S51 main control chip RST pin.

5. electronic password lock according to claim 1, it is characterised in that: the crystal oscillating circuit is using 12MHz as system External crystal-controlled oscillation, with AT89S51 main control chip XTAL1, XTAL2 pin connect.

6. electronic password lock according to claim 1, it is characterised in that: the display circuit uses liquid crystal display LCD1602 is connected with AT89S51 main control chip P3.0~P3.2, P0.0~P0.7, Vcc pin.

7. electronic password lock according to claim 1, it is characterised in that: the warning circuit includes piezoelectric ceramics sounding dress Set with a triode, connect with AT89S51 main control chip P2.1 pin Pin.