Circuit for controlling multi-bit nixie tube based on 8-bit shift register
Through the circuit design based on the 8-bit shift register, the circuit design and wiring complexity in the traditional digital tube display control method is simplified, I/O resources and peripheral devices are saved, and efficient control of multiple digital tubes is achieved, reducing the number of digital tubes. Design cost.
Patent Information
- Application Number
- CN202420663221.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-02
AI Technical Summary
When the traditional digital tube display control method controls multiple digital tubes at the same time, the circuit design is complex and the PCB layout is complex, requiring a large amount of I/O resources and peripheral devices, which increases the design cost and difficulty.
The circuit design based on the 8-bit shift register is adopted, including the MCU control unit, the bit selection control unit, the segment selection control unit and the digital tube control unit. The control of multiple digital tubes is realized through the serial interface and parallel output, and the STM32F103RBT6 microcontroller is used. and SN74HCS05PWR chip reduce the demand for peripheral driver circuits and I/O resources.
It simplifies circuit design, saves I/O resources, reduces design costs, facilitates MCU selection and PCB layout, and realizes efficient control of multiple digital tubes.
Smart Images
Figure CN222260490U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of household appliances, in particular to a circuit for controlling multi-bit digital tubes based on an 8-bit shift register. Background Art
[0002] It is widely used in home appliances and other fields, and its main function is to display the operating status or working parameters of the device. Traditional digital tube display control methods mostly use independent control methods, that is, a separate control chip is used to drive the display for each digital tube. This method is relatively simple when controlling a single digital tube display, but when controlling and driving multiple digital tube displays at the same time, it will greatly increase the difficulty of circuit design and PCB wiring, and also increase the design cost.
[0003] In the design of household appliances and other products, this circuit has the following disadvantages:
[0004] 1. The circuit design is complex and the PCB layout is complex;
[0005] 2. It requires more I / O resources, which is not conducive to MCU selection and circuit design;
[0006] 3. It requires many peripheral devices, which is not conducive to R&D cost control.
[0007] In summary, the utility model designs a circuit for controlling multi-digit digital tubes based on an 8-bit shift register. Utility Model Content
[0008] In view of the deficiencies in the prior art, the utility model aims to provide a circuit for controlling multiple digital tubes based on an 8-bit shift register, which has a reasonable structural design, is convenient for PCB layout and wiring, has low cost and strong practicality.
[0009] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a circuit based on an 8-bit shift register to control a multi-bit digital tube, comprising an MCU control unit, a bit selection control unit, a segment selection control unit and a digital tube control unit, the MCU control unit is respectively connected to the bit selection control unit and the segment selection control unit, the bit selection control unit is connected to the segment selection control unit through a serial interface, and the output ends of the bit selection control unit and the segment selection control unit are connected to the digital tube control unit; the MCU control unit adopts an STM32F103RBT6 single-chip microcomputer; the bit selection control unit and the segment selection control unit both adopt an SN74HCS05PWR chip; the digital tube control unit adopts an LDS-C32R.
[0010] Preferably, the MCU control unit is responsible for outputting control signals of the bit selection control unit and the segment selection control unit and control data of the digital tube display unit.
[0011] Preferably, the bit selection control unit is responsible for transmitting the segment selection control data to the segment selection control unit and controlling the bit selection of the digital tube display unit.
[0012] Preferably, the segment selection control unit is responsible for controlling the segment selection of the digital tube display unit.
[0013] Preferably, the digital tube display unit is responsible for displaying the received serial control data.
[0014] The utility model has the following beneficial effects:
[0015] 1. The utility model controls multiple digital tube displays through 4 I / O ports, which saves I / O resources compared with the traditional digital tube display control method, and facilitates the selection of MCU devices and circuit design;
[0016] 2. The digital display is controlled by two 8-bit shift registers in cascade, which reduces the peripheral drive circuit of the digital tube display and saves design costs;
[0017] 3. The circuit design is simple, which facilitates PCB layout and wiring. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is described in detail below with reference to the accompanying drawings and specific implementation methods;
[0019] Figure 1 It is a structural block diagram of the utility model;
[0020] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION
[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0022] Reference Figure 1-2 The present specific implementation adopts the following technical scheme: a circuit for controlling a multi-bit digital tube based on an 8-bit shift register, comprising an MCU control unit 1, a bit selection control unit 2, a segment selection control unit 3 and a digital tube control unit 4, wherein the MCU control unit 1 is connected to the bit selection control unit 2 and the segment selection control unit 3 respectively, the bit selection control unit 2 is connected to the segment selection control unit 3 via a serial interface, and the output ends of the bit selection control unit 2 and the segment selection control unit 3 are connected to the digital tube control unit 4; the MCU control unit 1 adopts an STM32F103RBT6 single-chip microcomputer; the bit selection control unit 2 and the segment selection control unit 3 both adopt an SN74HCS05PWR chip; the digital tube control unit 4 adopts an LDS-C32R.
[0023] The MCU control unit 1 is responsible for outputting control signals of the bit selection control unit and the segment selection control unit and control data of the digital tube display unit.
[0024] It is worth noting that the bit selection control unit is responsible for transmitting the segment selection control data to the segment selection control unit and controlling the bit selection of the digital tube display unit.
[0025] It is worth noting that the segment selection control unit is responsible for controlling the segment selection of the digital tube display unit.
[0026] In addition, the digital tube display unit is responsible for displaying the received serial control data.
[0027] This specific implementation method controls the 5-bit digital tube by cascading two 8-bit shift registers. The MCU control unit first serially outputs the segment selection control data, which passes through the bit selection control unit and the segment selection control unit in turn and is stored in the storage register of the segment selection control unit, and then serially outputs the bit selection control data to the storage register of the bit selection control unit. Finally, the MCU control unit enables the bit selection control unit and the segment selection control unit, and the bit selection control unit and the segment selection control unit respectively output the bit selection control data and the segment selection control data in parallel to control the dynamic display of the 5-bit digital tube.
[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A circuit for controlling a multi-digit digital tube based on an 8-bit shift register, characterized in that: The invention comprises an MCU control unit (1), a bit selection control unit (2), a segment selection control unit (3) and a digital tube control unit (4); the MCU control unit (1) is connected to the bit selection control unit (2) and the segment selection control unit (3) respectively; the bit selection control unit (2) is connected to the segment selection control unit (3) via a serial interface; the output ends of the bit selection control unit (2) and the segment selection control unit (3) are connected to the digital tube control unit (4); the MCU control unit (1) adopts an STM32F103RBT6 single chip microcomputer; the bit selection control unit (2) and the segment selection control unit (3) both adopt an SN74HCS05PWR chip; and the digital tube control unit (4) adopts an LDS-C32R.
2. A circuit for controlling a multi-digit digital tube based on an 8-bit shift register according to claim 1, characterized in that: The MCU control unit (1) is responsible for outputting control signals of the bit selection control unit and the segment selection control unit and control data of the digital tube display unit.
3. The circuit for controlling a multi-digit digital tube based on an 8-bit shift register according to claim 1, characterized in that: The bit selection control unit (2) is responsible for transmitting the segment selection control data to the segment selection control unit and controlling the bit selection of the digital tube display unit.
4. The circuit for controlling a multi-digit digital tube based on an 8-bit shift register according to claim 1, characterized in that: The segment selection control unit (3) is responsible for controlling the segment selection of the digital tube display unit.
5. A circuit for controlling a multi-digit digital tube based on an 8-bit shift register according to claim 2 or 3, characterized in that: The digital tube display unit is responsible for displaying the received serial control data.