CN207082256U - A kind of charactron dynamic scanning displaying principle teaching aid system - Google Patents
A kind of charactron dynamic scanning displaying principle teaching aid system Download PDFInfo
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- CN207082256U CN207082256U CN201720712787.3U CN201720712787U CN207082256U CN 207082256 U CN207082256 U CN 207082256U CN 201720712787 U CN201720712787 U CN 201720712787U CN 207082256 U CN207082256 U CN 207082256U
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Abstract
The utility model discloses a kind of charactron dynamic scanning displaying principle teaching aid system, belong to teaching aid technical field, including key-press module, single-chip microcomputer, buzzer module, four common anode charactrons, current-limiting resistance, two-way total driving chip, common-anode charactron and key switch, current-limiting resistance and two-way total driving chip electrically connect with common-anode charactron, four common anode charactrons are driven using scan mode, scan frequency is determined by interval time, key-press module is used for the scan frequency for controlling four common anode charactrons, and control buzzer module, buzzer module is used to prompt whether scan frequency is changed, common-anode charactron is used for stable display numeral.The utility model dynamic changes scan frequency, using intuitively PCB layout, facilitates student to understand the driving principle of charactron and dynamic scanning displaying.
Description
Technical field
A kind of teaching aid system is the utility model is related to, more particularly to a kind of charactron dynamic scanning displaying principle teaching aid system
System, belongs to teaching aid technical field.
Background technology
The display of more charactrons is divided into static drive mode and dynamical fashion, and the method for static state display has used more I/
O mouths, it will typically need the content storage shown in a register, the mode of connection is directly perceived, and understanding is relatively simple, is set in display module
In meter or SCM Based simple application, more charactrons are typically driven using dynamic display method, student is understood with being programmed with
Certain difficulty.
Utility model content
Main purpose of the present utility model is to provide for a kind of charactron dynamic scanning displaying principle teaching aid system, active
State changes scan frequency, using intuitively PCB layout, facilitates student to understand the driving principle of charactron and dynamic scanning displaying.
The purpose of this utility model can reach by using following technical scheme：
A kind of charactron dynamic scanning displaying principle teaching aid system, including key-press module, single-chip microcomputer, buzzer module, four
Position common anode charactron, current-limiting resistance, two-way total driving chip, common-anode charactron and key switch, the single-chip microcomputer difference
Driven with the key-press module, the buzzer module, four common anode charactrons, the current-limiting resistance, the two-way sum
Dynamic chip and key switch electrical connection, the current-limiting resistance and the two-way total driving chip with the common anode number of poles
Code pipe electrical connection, four common anode charactrons are driven using scan mode, and scan frequency is determined by interval time, the button
Module is used for the scan frequency for controlling four common anode charactrons, and controls the buzzer module, the buzzer module
For prompting whether scan frequency is changed, the common-anode charactron is used for stable display numeral.
Preferable scheme is that the single-chip microcomputer is STC89C52 type single-chip microcomputers, the minimum system of the STC89C52 types single-chip microcomputer
Altogether extend 3 I/O devices.
In any of the above-described scheme preferably, the key-press module is electrically connected with the key switch, and the button is opened
Pass is made up of button K1, and the button K1 electrically connects with the P3.1 pin expansion interfaces of the single-chip microcomputer.
In any of the above-described scheme preferably, the buzzer module and the P3.7 pin expansion interfaces of the single-chip microcomputer
Electrical connection, the buzzer module are made up of resistance R2, resistance R3, triode S8550 and buzzer Buzzer.
In any of the above-described scheme preferably, four common anode charactrons electrically connect with the current-limiting resistance, described
Current-limiting resistance is the exclusion RN1 that resistance is 510 ohm.
In any of the above-described scheme preferably, four common anode charactrons respectively with the two-way total driving chip
Electrically connected with the common-anode charactron.
In any of the above-described scheme preferably, the two-way total driving chip is the two-way sum driving of 74LS245 types
Chip, the two-way total driving chip of 74LS245 types are used for the driving force for amplifying the P2.0 interfaces of the single-chip microcomputer.
In any of the above-described scheme preferably, the common-anode charactron is 4 0.5 inch of common-anode charactron.
In any of the above-described scheme preferably, the font code driving of the current-limiting resistance and the common-anode charactron is drawn
Pin electrically connects, and the two-way total driving chip electrically connects with the word route selection of the common-anode charactron.
In any of the above-described scheme preferably, the key switch is triggered using external interrupt mode.
Advantageous effects of the present utility model：According to charactron dynamic scanning displaying principle teaching aid system of the present utility model
System, charactron dynamic scanning displaying principle teaching aid system provided by the utility model, the hardware of the teaching aid is with single-chip microcomputer
STC89C52 is core, and I/O mouths extend button, active buzzer and 48 alphanumeric code pipes and formed, and pass through the pressing of button
Scan frequency can dynamically be changed, sending sound prompting student's scan frequency by buzzer is changed, execution logic control
The software programming of system and dynamic scan is on STC89C52, on the basis of STC89C52 minimum system plates, in P0 mouths and P2 mouths
4 alphanumeric code pipes of common-anode 8 are extended, are driven using scan mode, the frequency of scanning is determined by interval time, original state,
Scan frequency is 2 times per second, is clear that 4 charactrons are lit successively, and when triggering button clicks, charactron is swept
Retouching frequency will increase, while buzzer sounding, advisory frequency are modified, often by one-touch, scanning can add it is fast again, totally 10
Level, when scan frequency is close to during 25 time/second, the numeral of 4 charactrons shows that dynamic changes scan frequency by stable, uses
Intuitively PCB layout, student is facilitated to understand the driving principle of charactron and dynamic scanning displaying.
Brief description of the drawings
Fig. 1 is the knot according to a preferred embodiment of charactron dynamic scanning displaying principle teaching aid system of the present utility model
Structure schematic diagram；
Fig. 2 is in the preferred embodiment according to charactron dynamic scanning displaying principle teaching aid system of the present utility model
Portion's circuit diagram, the embodiment can be and Fig. 1 identicals embodiment or the embodiment different with Fig. 1；
Fig. 3 is the number according to a preferred embodiment of charactron dynamic scanning displaying principle teaching aid system of the present utility model
Code pipe scanning process figure, the embodiment can be and Fig. 1 or Fig. 2 identicals embodiment or different with Fig. 1 or Fig. 2
Embodiment；
Fig. 4 is pressing according to a preferred embodiment of charactron dynamic scanning displaying principle teaching aid system of the present utility model
Key interrupt processing flow chart, the embodiment can be with Fig. 1 or Fig. 2 or Fig. 3 identicals embodiment or with Fig. 1 or Fig. 2
Or the embodiment that Fig. 3 is different；
Fig. 5 is to determine according to a preferred embodiment of charactron dynamic scanning displaying principle teaching aid system of the present utility model
When interrupt processing flow chart, the embodiment can be and Fig. 1 or Fig. 2 or Fig. 3 or Fig. 4 identicals embodiment or and Fig. 1
Or the embodiment that Fig. 2 or Fig. 3 or Fig. 4 is different.
In figure：1- key-press modules, 2- single-chip microcomputers, 3- buzzer modules, tetra- common anode charactrons of 4-, 5- current-limiting resistances, 6-
Two-way total driving chip, 7- common-anode charactrons, 8- key switches.
Embodiment
To make those skilled in the art more clear and clear and definite the technical solution of the utility model, with reference to embodiment and
Accompanying drawing is described in further detail to the utility model, but embodiment not limited to this of the present utility model.
As depicted in figs. 1 and 2, a kind of charactron dynamic scanning displaying principle teaching aid system that the present embodiment provides, including
Key-press module 1, single-chip microcomputer 2,3, four common anode charactrons 4 of buzzer module, current-limiting resistance 5, two-way total driving chip 6, altogether
Anode charactron 7 and key switch 8, the single-chip microcomputer 2 respectively with the key-press module 1, the buzzer module 3, described four
Position common anode charactron 4, the current-limiting resistance 5, the two-way total driving chip 6 and the key switch 8 electrically connect, the limit
Leakage resistance 5 and the two-way total driving chip 6 electrically connect with the common-anode charactron 7, four common anode charactrons 4
Driven using scan mode, scan frequency is determined by interval time, and the key-press module 1 is used to control four common anode numbers
The scan frequency of pipe 4, and the buzzer module 3 is controlled, the buzzer module 3 is used to prompt whether scan frequency is changed,
The common-anode charactron 7 is used for stable display numeral.
Further, in the present embodiment, as depicted in figs. 1 and 2, the single-chip microcomputer 2 is STC89C52 type single-chip microcomputers, institute
State STC89C52 types single-chip minimum system and extend 3 I/O devices altogether, the key-press module 1 is electrically connected with the key switch 8
Connecing, the key switch 8 is made up of button K1, and the button K1 electrically connects with the P3.1 pin expansion interfaces of the single-chip microcomputer 2,
The buzzer module 3 electrically connects with the P3.7 pin expansion interfaces of the single-chip microcomputer 2, the buzzer module 3 by resistance R2,
Resistance R3, triode S8550 and buzzer Buzzer compositions.
Further, in the present embodiment, as depicted in figs. 1 and 2, four common anode charactrons 4 and current limliting electricity
The electrical connection of resistance 5, the current-limiting resistance 5 is the exclusion RN1 that resistance is 510 ohm, four common anode charactrons 4 respectively with it is described
Two-way total driving chip 6 and the common-anode charactron 7 electrically connect, and the two-way total driving chip 6 is that 74LS245 types are double
To total driving chip, the two-way total driving chip of 74LS245 types is used for the driving energy for amplifying the P2.0 interfaces of the single-chip microcomputer 2
Power.
Further, in the present embodiment, as depicted in figs. 1 and 2, the common-anode charactron 7 is 4 0.5 inch
Common-anode charactron, the current-limiting resistance 5 electrically connects with the font code driving pin of the common-anode charactron 7, described two-way
Total driving chip 6 electrically connects with the word route selection of the common-anode charactron 7, and the key switch 8 uses external interrupt mode
Triggering.
Further, in the present embodiment, as depicted in figs. 1 and 2, Fig. 1 charactrons Dynamic Announce teaching aid system module figure,
STC single-chip minimum systems extend 3 I/O devices altogether, and the button in Fig. 1 corresponds to Fig. 2 K1, the buzzer pair in Fig. 1
Should be in the expansion of the P3.7 pins in Fig. 2, current-limiting resistance RN1 of 4 common anode number tube modules corresponding to Fig. 2 upper right corner
(resistance is 510 ohm of exclusion), 74LS245 and 4 0.5 inch of common-anode charactron, 74LS245 are two-way sum drivings
Chip, it is used for the driving force for amplifying single-chip microcomputer P2 mouths here, charactron lower section " ABCDEFG " is that the driving of font code is drawn in Fig. 2
Pin, " DP " drive for decimal point；" 1234 " are the word route selection of 4 charactrons, common-anode, when P2 connects high level, are passed through
U2 driving, 0.5 inch of charactron can be directly driven, when P2.0 is high level, P0 mouths export low level, will light the 1st
Charactron, when P2.1 is high level, will light the 2nd charactron, the like.P0 mouths send different font codes to show
Different characters.
Further, in the present embodiment, as shown in Fig. 3, Fig. 4 and Fig. 5, dynamic scan flow such as Fig. 3 institutes of charactron
Show：
The font code of charactron is：
Sweep spacing is predefined using array：
Unsigned char intVal []={ 250,200,100,50,25,12,10,9,8,7 }；// sweep spacing
The character ordinal number of numeral method is placed in array lcd：
Unsigned char lcd []={ 1,2,3,4 }；
Initially it is shown as " 1,2,3,4 ".
" send position to select " in Fig. 3 and refer to sending P2.0 successively, P2.1, P2.2, P2.3 high level, i.e., light 1-4 numbers successively
Pipe, after the frequency of scanning exceedes the retentivity time of eye of human eye, you can see stable numerical monitor.
Button K1 triggering：Change scan frequency
K1 buttons are triggered using external interrupt mode.
Interrupt service routine will change the sweep spacing of charactron：250,200,100,50,25,12,10,9,8,7, unit
For millisecond, often by once, sweep spacing reduces about half, to see process clearly, reduction interval several times below, in order to attract student
Attention, often by one-touch, allow buzzer to send sound, buzzer uses active buzzer, P3.7 output low levels, driving
Triode Q1 works in saturated mode, BUZ1 sounding, starts timer T0 simultaneously in K1 keys interrupt service routines, in T0 timers
Overflow in interrupting and close buzzer, reach the short delay of sounding.
The sound production prompt of buzzer：
It is high level that P3.7 is made in T0 timer interrupt service programs, and triode Q1 works in off-state, and BUZ1 stops
Sounding.
Because button and buzzer handle the method for employing interruption, the dynamic scan effect of charactron is not influenceed.
When making printed circuit board (PCB) (PCB) wiring, the driving of font code and bit line by charactron are tried one's best in PCB the same face
On, and by " driving of font code " and " position selects " be placed on silk-screen layer.
In summary, in the present embodiment, according to the charactron dynamic scanning displaying principle teaching aid system of the present embodiment, sheet
The charactron dynamic scanning displaying principle teaching aid system that embodiment provides, the hardware of the teaching aid is using single-chip microcomputer STC89C52 as core
, I/O mouths extend button, active buzzer and 48 alphanumeric code pipes and formed, and can dynamically be changed by the pressing of button and swept
Frequency is retouched, sending sound prompting student's scan frequency by buzzer is changed, execution logic control and dynamic scan
On the basis of STC89C52 minimum system plates, 4 common-anodes are extended in P0 mouths and P2 mouths on STC89C52 for software programming
8 alphanumeric code pipes, are driven using scan mode, and the frequency of scanning is determined by interval time, original state, and scan frequency is per second 2
It is secondary, it is clear that 4 charactrons are lit successively, when triggering button clicks, the scan frequency of charactron will increase, together
When buzzer sounding, advisory frequency is modified, often by one-touch, scanning can add it is fast again, totally 10 grades, when scan frequency connects
During nearly 25 time/second, the numeral of 4 charactrons shows that dynamic changes scan frequency by stable, using intuitively PCB layout, side
Just student understands the driving principle of charactron and dynamic scanning displaying.
It is described above, only the utility model further embodiment, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art is in scope disclosed in the utility model, according to of the present utility model
Technical scheme and its design are subject to equivalent substitution or change, belong to the scope of protection of the utility model.
Claims (10)
- A kind of 1. charactron dynamic scanning displaying principle teaching aid system, it is characterised in that：Including key-press module (1), single-chip microcomputer (2), buzzer module (3), four common anode charactrons (4), current-limiting resistance (5), two-way total driving chip (6), common anode number of poles Code pipe (7) and key switch (8), the single-chip microcomputer (2) respectively with the key-press module (1), the buzzer module (3), institute State four common anode charactrons (4), the current-limiting resistance (5), the two-way total driving chip (6) and the key switch (8) Electrical connection, the current-limiting resistance (5) and the two-way total driving chip (6) electrically connect with the common-anode charactron (7), Four common anode charactrons (4) are driven using scan mode, and scan frequency is determined by interval time, the key-press module (1) For controlling the scan frequency of four common anode charactrons (4), and control the buzzer module (3), the buzzer mould Block (3) is used to prompt whether scan frequency is changed, and the common-anode charactron (7) is used for stable display numeral.
- A kind of 2. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：The list Piece machine (2) is STC89C52 type single-chip microcomputers, and the STC89C52 types single-chip minimum system extends 3 I/O devices altogether.
- A kind of 3. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：It is described to press Key module (1) electrically connects with the key switch (8), and the key switch (8) is made up of button K1, the button K1 with it is described The P3.1 pins expansion interface electrical connection of single-chip microcomputer (2).
- A kind of 4. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：The honeybee Ring device module (3) electrically connected with the P3.7 pin expansion interfaces of the single-chip microcomputer (2), the buzzer module (3) by resistance R2, Resistance R3, triode S8550 and buzzer Buzzer compositions.
- A kind of 5. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：Described four Position common anode charactron (4) electrically connects with the current-limiting resistance (5), and the current-limiting resistance (5) is the exclusion that resistance is 510 ohm RN1。
- A kind of 6. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：Described four Position common anode charactron (4) electrically connects with the two-way total driving chip (6) and the common-anode charactron (7) respectively.
- A kind of 7. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：It is described double It is the two-way total driving chip of 74LS245 types to total driving chip (6), the two-way total driving chip of 74LS245 types is used to put The driving force of the P2.0 interfaces of the big single-chip microcomputer (2).
- A kind of 8. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：It is described common Anode charactron (7) is 4 0.5 inch of common-anode charactron.
- A kind of 9. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：The limit Leakage resistance (5) electrically connects with the font code driving pin of the common-anode charactron (7), the two-way total driving chip (6) Word route selection with the common-anode charactron (7) electrically connects.
- A kind of 10. charactron dynamic scanning displaying principle teaching aid system according to claim 1, it is characterised in that：It is described Key switch (8) is triggered using external interrupt mode.
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| CN201720712787.3U CN207082256U (en) | 2017-06-19 | 2017-06-19 | A kind of charactron dynamic scanning displaying principle teaching aid system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111243494A (en) * | 2019-10-22 | 2020-06-05 | 深圳市越芯电子有限责任公司 | Dynamic scanning method and device for LED nixie tube, electronic equipment and storage medium |
-
2017
- 2017-06-19 CN CN201720712787.3U patent/CN207082256U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111243494A (en) * | 2019-10-22 | 2020-06-05 | 深圳市越芯电子有限责任公司 | Dynamic scanning method and device for LED nixie tube, electronic equipment and storage medium |
| CN111243494B (en) * | 2019-10-22 | 2021-07-27 | 深圳市越芯电子有限责任公司 | Dynamic scanning method and device for LED nixie tube, electronic equipment and storage medium |
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