CN219872432U

CN219872432U - Fingerprint identification module and PCB mainboard

Info

Publication number: CN219872432U
Application number: CN202321077686.5U
Authority: CN
Inventors: 罗章林; 谢春桃
Original assignee: Shenzhen Xiaoka Intelligent Internet Of Things Technology Co ltd
Current assignee: Shenzhen Xiaoka Intelligent Internet Of Things Technology Co ltd
Priority date: 2023-05-08
Filing date: 2023-05-08
Publication date: 2023-10-20
Anticipated expiration: 2033-05-08

Abstract

The utility model discloses a fingerprint identification module and a PCB main board, wherein the fingerprint identification module comprises a main control chip, the model of the main control chip is STC89C52, pins P00-P07 and P24-P26 of the main control chip are electrically connected with a liquid crystal display circuit, pin P16 of the main control chip is electrically connected with a relay circuit, pin P30-P31 of the main control chip is electrically connected with a fingerprint circuit, the fingerprint circuit comprises a fingerprint collector U2, pin 1 of the fingerprint collector U2 is electrically connected with a voltage stabilizing chip, the voltage stabilizing chip is connected with a power supply circuit, pin 2 of the fingerprint collector U2 is electrically connected with pin P30 of the main control chip, pin 3 of the fingerprint collector U2 is electrically connected with pin P31 of the main control chip, and pin 4 of the fingerprint collector U2 is grounded. Compared with the traditional LED nixie tube display device, the liquid crystal display module has the advantages of small volume, low power consumption, rich display content and the like, and a driving circuit is not needed to be additionally arranged.

Description

Fingerprint identification module and PCB mainboard

Technical Field

The utility model relates to the field of circuit boards, in particular to a fingerprint identification module and a PCB main board.

Background

The fingerprint module is a core component of the fingerprint lock, is installed on devices such as a fingerprint access control device or a hard disk and is used for completing fingerprint acquisition and fingerprint identification. The fingerprint module mainly comprises fingerprint acquisition module, fingerprint identification module and extension function module (like tool to lock drive module), need carry out liquid crystal display after the fingerprint identification, need even liquid crystal display current fingerprint identification module promptly, but current liquid crystal display power consumption is high, and is bulky, and the circuit is also unstable inadequately.

Disclosure of Invention

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a fingerprint identification module and PCB mainboard, includes the main control chip, the model of main control chip is STC89C52, liquid crystal display circuit is connected to main control chip's P00-P07, P24-P26 pin electricity, key circuit is connected to main control chip's P10-P15 pin electricity, relay circuit is connected to main control chip's P16 pin electricity, fingerprint circuit is connected to main control chip's P30-P31 pin electricity, fingerprint circuit includes fingerprint collector U2, a steady voltage chip is connected to fingerprint collector U2's 1 st pin electricity, steady voltage chip connects power supply circuit, fingerprint collector U2's 2 nd pin electricity is connected main control chip's P30 pin, fingerprint collector U2's 3 rd pin electricity is connected main control chip's P31 pin, fingerprint collector U2's 4 th pin ground connection.

Further, the fingerprint collector U2 and the main control chip are further coupled to a download port JD1.

Further, the key circuit comprises electric switches S2-S7, and the electric switches S2-S7 are respectively and correspondingly and electrically connected with pins P10-P15 of the main control chip.

Further, the liquid crystal display circuit comprises a liquid crystal display tube, the model of the liquid crystal display tube is an LCD1602, pins 7-14 of the liquid crystal display tube are correspondingly and electrically connected with pins P00-P07 of the main control chip, pins 4-6 of the liquid crystal display tube are correspondingly and electrically connected with pins P24-P26 of the main control chip, pins 15 and 2 of the liquid crystal display tube are connected with VCC ends, pins 16 and 1 of the liquid crystal display tube are grounded, and pin 3 of the liquid crystal display tube is electrically connected with a slide resistor and then grounded.

Further, the relay circuit comprises a relay, a collector electrode of a triode Q1 is electrically connected to a 4 th pin of the relay, an emitter electrode of the triode Q1 is electrically connected to a VCC end, a base electrode of the triode Q1 is electrically connected with a resistor R3 and then is electrically connected with a P16 pin of a main control chip, a light emitting diode LED2 is electrically connected to the 4 th pin of the relay and the collector electrode of the triode Q1 after being electrically connected with a resistor R4, and the light emitting diode LED2 and a 5 th pin of the relay are grounded.

A PCB main board comprises the fingerprint identification module.

Compared with the prior art, the utility model has the following beneficial effects:

compared with the traditional LED nixie tube display device, the liquid crystal display module has the advantages of small volume, low power consumption, rich display content and the like, and a driving circuit is not needed to be additionally arranged.

Drawings

FIG. 1 is an overall schematic of the circuit of the present utility model;

FIG. 2 is a schematic diagram of a portion of the circuit of the present utility model, and in particular, a key circuit;

FIG. 3 is a schematic diagram of a portion of the circuit of the present utility model, and in particular, a schematic diagram of a liquid crystal display circuit;

FIG. 4 is a schematic diagram of a portion of the circuit of the present utility model, and in particular a relay circuit;

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a fingerprint identification module, as shown in fig. 1-4, which comprises a main control chip, wherein the model of the main control chip is STC89C52, pins P00-P07 and P24-P26 of the main control chip are electrically connected with a liquid crystal display circuit, pins P10-P15 of the main control chip are electrically connected with a key circuit, pins P16 of the main control chip are electrically connected with a relay circuit, pins P30-P31 of the main control chip are electrically connected with a fingerprint collector U2, the fingerprint circuit comprises a voltage stabilizing chip, pin 1 of the fingerprint collector U2 is electrically connected with a power supply circuit, pin 2 of the fingerprint collector U2 is electrically connected with pin P30 of the main control chip, pin 3 of the fingerprint collector U2 is electrically connected with pin P31 of the main control chip, and pin 4 of the fingerprint collector U2 is grounded. The fingerprint collector U2 and the main control chip are also coupled with a download port JD1. The key circuit comprises electric switches S2-S7, and the electric switches S2-S7 are respectively and correspondingly and electrically connected with pins P10-P15 of the main control chip. The liquid crystal display circuit comprises a liquid crystal display tube, the type of the liquid crystal display tube is LCD1602, pins 7-14 of the liquid crystal display tube are correspondingly and electrically connected with pins P00-P07 of a main control chip, pins 4-6 of the liquid crystal display tube are correspondingly and electrically connected with pins P24-P26 of the main control chip, pins 15 and 2 of the liquid crystal display tube are connected with VCC ends, pins 16 and 1 of the liquid crystal display tube are grounded, and pin 3 of the liquid crystal display tube is electrically connected with a slide resistor and then grounded. The relay circuit comprises a relay, a collector electrode of a triode Q1 is electrically connected to a 4 th pin of the relay, an emitter electrode of the triode Q1 is electrically connected with a VCC end, a base electrode of the triode Q1 is electrically connected with a resistor R3 and then is electrically connected with a P16 pin of a main control chip, a light emitting diode LED2 is electrically connected to the 4 th pin of the relay and the collector electrode of the triode Q1 after being electrically connected with a resistor R4, and the light emitting diode LED2 and a 5 th pin of the relay are grounded.

The fingerprint acquisition device is characterized in that a power supply circuit is connected with a fingerprint acquisition device U2 through a voltage stabilizing chip, the fingerprint acquisition device U2 acquires fingerprints through an optical sensor, the acquired fingerprints read data of the sensor through two functional data transmission lines RXD and TSD and then are transmitted to a singlechip, namely a main control chip, the singlechip judges whether the fingerprints are matched with budget fingerprints or not through calculation after acquiring fingerprint signals, and then the acquired fingerprints are displayed through a liquid crystal display tube. In addition, when the fingerprints are matched, the singlechip can also drive the relay circuit through the P16 pin to judge whether the fingerprints are matched, so that the relay circuit is driven to realize the control of a switch, and in the implementation, the switch control is generally used for controlling the opening and closing of a lock. And a key circuit is also arranged for setting the singlechip.

The utility model also provides a PCB main board comprising the fingerprint identification module.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fingerprint identification module, its characterized in that includes the main control chip, the model of main control chip is STC89C52, liquid crystal display circuit is connected to main control chip's P00-P07, P24-P26 pin electricity, key circuit is connected to main control chip's P10-P15 pin electricity, relay circuit is connected to main control chip's P16 pin electricity, fingerprint circuit is connected to main control chip's P30-P31 pin electricity, fingerprint circuit includes fingerprint collector U2, fingerprint collector U2's 1 st pin electricity is connected a steady voltage chip, steady voltage chip connects power supply circuit, fingerprint collector U2's 2 nd pin electricity is connected main control chip's P30 pin, fingerprint collector U2's 3 rd pin electricity is connected main control chip's P31 pin, fingerprint collector U2's 4 th pin ground connection.

2. The fingerprint recognition module according to claim 1, wherein the fingerprint collector U2 and the main control chip are further coupled to a download port JD1.

3. The fingerprint identification module of claim 1, wherein the key circuit comprises electrical switches S2-S7, and the electrical switches S2-S7 are respectively and correspondingly electrically connected with pins P10-P15 of the main control chip.

4. The fingerprint identification module of claim 1, wherein the liquid crystal display circuit comprises a liquid crystal display tube, the type of the liquid crystal display tube is LCD1602, pins 7-14 of the liquid crystal display tube are correspondingly electrically connected with pins P00-P07 of the main control chip, pins 4-6 of the liquid crystal display tube are correspondingly electrically connected with pins P24-P26 of the main control chip, pins 15 and 2 of the liquid crystal display tube are connected with VCC ends, pins 16 and 1 of the liquid crystal display tube are grounded, and pin 3 of the liquid crystal display tube is electrically connected with a slide resistor and then grounded.

5. The fingerprint recognition module according to claim 1, wherein the relay circuit comprises a relay, a 4 th pin of the relay is electrically connected with a collector of a triode Q1, an emitter of the triode Q1 is electrically connected with a VCC end, a base of the triode Q1 is electrically connected with a resistor R3 and then is electrically connected with a P16 pin of the main control chip, a 4 th pin of the relay and a collector of the triode Q1 are electrically connected with a resistor R4 and then are electrically connected with a light emitting diode LED2, and the light emitting diode LED2 and a 5 th pin of the relay are grounded.

6. A PCB motherboard comprising a fingerprint recognition module according to any one of claims 1 to 5.