CN201627425U

CN201627425U - Electronic password lock

Info

Publication number: CN201627425U
Application number: CN2009203170511U
Authority: CN
Inventors: 蔡军凡
Original assignee: Xian University of Technology
Current assignee: Xian University of Technology
Priority date: 2009-12-10
Filing date: 2009-12-10
Publication date: 2010-11-10
Anticipated expiration: 2019-12-10

Abstract

The utility model discloses an electronic password lock. The electronic password lock comprises a singlechip, wherein a power source, a time scanning circuit, an alarm, a trigger, a keypad scanning circuit and a keypad memory circuit are respectively connected with the singlechip. The singlechip is the AT89S52 singlechip. The trigger can be used for setting an 8 numerical digits password, and a keypad signal is transmitted to the singlechip through the trigger and stored by the keypad memory circuit. When some one unlocks the password lock, a password is inputted through the trigger, a keypad scanning signal is offered by the keypad scanning circuit to be transmitted to the time scanning circuit, the keypad scanning signal is compared with the original stored signal, and the alarm gives an alarm if the two signals are inconsonant with each other. Therefore, the electronic password lock has simple structure and good theft-proof effect.

Description

Electronic password lock

Technical field

The utility model belongs to the single-chip microcomputer applied technical field, relates to a kind of electronic password lock.

Background technology

The structure of existing electronic password lock is more complicated all, and implements cost than higher.

Summary of the invention

The purpose of this utility model provides a kind of electronic password lock based on the AT89S52 single-chip microcomputer, and is simple in structure, good anti-theft effect.

The technical scheme that the utility model adopted is, a kind of electronic password lock comprises single-chip microcomputer, and power supply, clock scan circuit, alarm, trigger, key scanning circuit, button memory circuit are connected with single-chip microcomputer respectively.

Feature of the present utility model also is,

Single-chip microcomputer is the AT89S52 single-chip microcomputer.

Electronic password lock of the present utility model, 8 passwords can be set on trigger, push button signalling just passes to single-chip microcomputer by trigger, by the button memory circuitry stores, when others plays coded lock, earlier by trigger input password, provide the key scan signal to pass to the clock scan circuit through key scanning circuit then, signal and former storage signal are compared alarm equipment alarm when signal is inconsistent, it is simple in structure, good anti-theft effect.

Description of drawings

Fig. 1 is the electrical block diagram of the utility model electronic password lock.

Wherein, 1. power supply, 2. single-chip microcomputer, 3. clock scan circuit, 4. alarm, 5. trigger, 6. key scanning circuit, 7. button memory circuit.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The circuit structure of the utility model electronic password lock as shown in Figure 1, comprises single-chip microcomputer 2, and power supply 1, clock scan circuit 3, alarm 4, trigger 5, key scanning circuit 6, button memory circuit 7 are connected with single-chip microcomputer 2 respectively.

Wherein single-chip microcomputer 2 is the AT89S52 single-chip microcomputer, and trigger 5 is provided with 8 buttons, is used for setting code, and the voltage of power supply 1 is 4V.

The use of the utility model electronic password lock is, 8 passwords can be set on trigger 5 altogether, every span is 1-8, in the time of user's setting code, push button signalling just passes to single-chip microcomputer 2 by trigger 5, by 7 storages of button memory circuit, when others plays coded lock, also need earlier by trigger 5 input passwords, provide the key scan signal to pass to clock scan circuit 3 through key scanning circuit 6 then, signal and former storage signal are compared, alarm 4 is reported to the police when signal is inconsistent, when unanimity, scrambler is unblanked.It is simple in structure, good anti-theft effect.

Claims

1. an electronic password lock is characterized in that, comprises single-chip microcomputer (2), and power supply (1), clock scan circuit (3), alarm (4), trigger (5), key scanning circuit (6), button memory circuit (7) are connected with described single-chip microcomputer (2) respectively.

2. electronic password lock according to claim 1 is characterized in that, described single-chip microcomputer (2) is the AT89S52 single-chip microcomputer.