CN213123732U - Device based on level conversion drive shows - Google Patents
Device based on level conversion drive shows Download PDFInfo
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- CN213123732U CN213123732U CN202021826431.0U CN202021826431U CN213123732U CN 213123732 U CN213123732 U CN 213123732U CN 202021826431 U CN202021826431 U CN 202021826431U CN 213123732 U CN213123732 U CN 213123732U
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- module
- wire
- level conversion
- nixie tube
- tube display
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Abstract
The utility model discloses a device based on level conversion drive shows, including the host computer control panel, the output of host computer control panel is connected with host computer interface module through the wire, host computer interface module is connected with the NTC module through the wire, charactron shows drive module, bee calling organ module and button module, charactron shows drive module's input is connected with DC-DC module through the wire, charactron shows drive module's output is connected with charactron display module through the wire, button module's output is connected with level conversion module through the wire, level conversion module's output passes through the wire and is connected with charactron shows drive module's input. Through the matching use of the electrical components, the stable operation of the nixie tube can be ensured, and the reliability of communication is ensured.
Description
Technical Field
The utility model relates to a level transition drive shows relevant technical field, specifically is a device based on level transition drive shows.
Background
Because the power supply voltage of the singlechip is 3.3V, if level conversion is not added between the singlechip and the nixie tube drive, the operation of the nixie tube display drive is not stable enough, and therefore, a level conversion circuit is added in IIC communication to ensure the reliability of the communication.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device based on level shift drive shows to solve the current single chip microcomputer control charactron drive operation that provides in the above-mentioned background art and be unstable enough, can't guarantee the problem of communication reliability.
In order to achieve the above object, the utility model provides a following technical scheme: the device comprises a host control panel, wherein the output end of the host control panel is connected with a host interface module through a wire, and the host interface module is connected with an NTC module, a nixie tube display driving module, a buzzer module and a key module through wires.
Preferably, the input end of the nixie tube display driving module is connected with a DC-DC module through a lead.
Preferably, the output end of the nixie tube display driving module is connected with the nixie tube display module through a wire.
Preferably, the output end of the key module is connected with a level conversion module through a wire, and the output end of the level conversion module is connected with the input end of the nixie tube display driving module through a wire.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses, by host computer control panel to host computer interface module input power and signal of telecommunication, be NTC's temperature signal, GND, demonstration driver chip IIC agreement communication, NTC signal and the control signal who reserves the button respectively, control the work of charactron display module and bee calling organ respectively through these control signals, can guarantee the charactron and show driver module's steady operation, guarantee the reliability of communication.
Drawings
FIG. 1 is a schematic block diagram of the circuit design implemented by the present invention;
FIG. 2 is a diagram of a motherboard interface according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a DC-DC design according to an embodiment of the present invention;
fig. 4 is a circuit diagram of the embodiment of the present invention.
Fig. 5 is a circuit diagram of a level shift module according to an embodiment of the present invention.
Fig. 6 is a circuit diagram of a drive module for nixie tube display according to an embodiment of the present invention.
Fig. 7 is a design diagram of a digital display driving circuit according to an embodiment of the present invention.
Fig. 8 is a circuit diagram of a buzzer module according to an embodiment of the present invention.
Fig. 9 is a circuit diagram of a key module according to an embodiment of the present invention.
Fig. 10 is a schematic block diagram of a system according to an embodiment of the present invention.
In the figure: 1. a host control board; 2. a host interface module; 3. a DC-DC module; 4. an NTC module; 5. A level conversion module; 6. a nixie tube display driving module; 7. a nixie tube display module; 8. a buzzer module; 9. and a key module.
Detailed Description
In order to enable the singlechip to control the drive of the nixie tube to operate stably and ensure the reliability of communication, the device for driving display based on level conversion is particularly provided. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-10, the present embodiment provides a device for driving display based on level shift, which includes a host control board 1, and is characterized in that: the output end of the host control panel 1 is connected with a host interface module 2 through a wire, and the host interface module 2 is connected with an NTC module 4, a nixie tube display driving module 6, a buzzer module 8 and a key module 9 through wires.
The input end of the nixie tube display driving module 6 is connected with the DC-DC module 3 through a lead.
The output end of the nixie tube display driving module 6 is connected with a nixie tube display module 7 through a conducting wire.
The output end of the key module 9 is connected with the level conversion module 5 through a wire, and the output end of the level conversion module 5 is connected with the input end of the nixie tube display driving module 6 through a wire.
In this embodiment, the operation of the level shift circuit mainly includes the following three states:
the level conversion module 5 is used in IIC bidirectional digital communication, and aims to keep the levels at two ends of a circuit synchronous and consistent, namely when an input end signal is at a high level (3.3V), an output end signal is also at a high level (5V); when the input signal is at low level (0V), the output signal is also at low level (0V). Otherwise (when working in reverse), the same applies.
When no device pulls down the bus line, the bus line of the low-voltage part is pulled up to 3.3V through the pull-up resistors R7/R8, the gate and the source of the MOS-FET are both 3.3V, so that the VGS of the MOS-FET is lower than the threshold voltage, the MOS-FET is not conducted, and the bus line of the high-voltage part is allowed to be pulled up to 5V through the pull-up resistors R9/R10, and the bus lines of the two parts are at high level only and have different voltage levels.
When the 3.3V device pulls the bus line low, the source of the MOS-FET also goes low and the gate is 3.3V. VGS rises above the threshold and the MOS-FET transistor begins to conduct, then the "high voltage" portion of the bus line is pulled down to a low level by the 3.3V device through the conducting MOS-FET transistor. At this time, the bus lines of both parts are at low level and the voltage level is the same.
When the 5V device pulls down the bus line to a low level, the drain-substrate diode "low voltage" portion of the MOS-FET is pulled down until VGS exceeds a threshold value, and the MOS-FET begins to conduct. The bus line of the "low voltage" part is further pulled down to a low level by the 5V device through the conducting MOS-FET transistor. At this time, the bus lines of both parts are at low level and the voltage level is the same.
When the nixie tube display module 7 works, the nixie tube display module 7 is driven by the nixie tube display driving module 6 according to the IIC communication protocol to display different actions.
Through the matching use of the electrical components, the stable operation of the nixie tube can be ensured, and the reliability of communication is ensured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A device for driving display based on level conversion comprises a host control board (1), and is characterized in that: the output end of the host control panel (1) is connected with a host interface module (2) through a wire, and the host interface module (2) is connected with an NTC module (4), a nixie tube display driving module (6), a buzzer module (8) and a key module (9) through wires.
2. The apparatus according to claim 1, wherein: the input end of the nixie tube display driving module (6) is connected with a DC-DC module (3) through a lead.
3. The apparatus according to claim 1, wherein: the output end of the nixie tube display driving module (6) is connected with a nixie tube display module (7) through a lead.
4. The apparatus according to claim 1, wherein: the output end of the key module (9) is connected with a level conversion module (5) through a wire, and the output end of the level conversion module (5) is connected with the input end of the nixie tube display driving module (6) through a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021826431.0U CN213123732U (en) | 2020-08-27 | 2020-08-27 | Device based on level conversion drive shows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021826431.0U CN213123732U (en) | 2020-08-27 | 2020-08-27 | Device based on level conversion drive shows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213123732U true CN213123732U (en) | 2021-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021826431.0U Active CN213123732U (en) | 2020-08-27 | 2020-08-27 | Device based on level conversion drive shows |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213123732U (en) |
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2020
- 2020-08-27 CN CN202021826431.0U patent/CN213123732U/en active Active
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