CN205883183U - Point -reading machine's reset circuit - Google Patents
Point -reading machine's reset circuit Download PDFInfo
- Publication number
- CN205883183U CN205883183U CN201620720022.XU CN201620720022U CN205883183U CN 205883183 U CN205883183 U CN 205883183U CN 201620720022 U CN201620720022 U CN 201620720022U CN 205883183 U CN205883183 U CN 205883183U
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- audion
- triode
- button
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Communication Cables (AREA)
Abstract
The utility model relates to a point -reading machine technical field discloses a point -reading machine's reset circuit, including button, first to third resistance, first and second electric capacity and triode, the one end and the first ohmic connection of button, the other end ground connection of button, the other end of first resistance is connected with the collecting electrode of triode, the emitter ground of triode, base and third resistance one end, the second electric capacity one end of triode are connected, third resistance other end ground connection, the second electric capacity other end is connected with the power, the second ohmic connection is between the collecting electrode of power and triode, a capacitance connection is between the collecting electrode and projecting pole of triode, first electric capacity is ground connection still. The utility model discloses a triode restores to the throne when realizing going up the electricity, adopts the button to realize going up electricity back manual reset, and whole circuit has the high and not fragile advantage of reliability.
Description
Technical field
This utility model relates to point reader technical field, more specifically, particularly to the reset circuit of a kind of point reader.
Background technology
Point reader is to use up-to-date optical image recognition technology and a new generation of advanced numeral voice technological development
Intelligence is read and learning tool.It embodies being perfectly combined of electronic product and education sector, it is achieved that people-oriented for science and technology
Theory.Point reader can realize reading simultaneously, re-reading, with reading, record and the various functions such as amusement.
Crashing the most easily occurs in point reader, and the design of reset circuit is essential, reset of the prior art
Circuit realizes only with resistance and electric capacity, and its reliability is relatively low, and circuit is easily damaged.For this reason, it is necessary to a kind of point reader of design
Reset circuit.
Utility model content
The purpose of this utility model is to provide a kind of reliability high and the reset circuit of the non-damageable point reader of circuit.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of reset circuit of point reader, including button, the first to the 3rd resistance, the first and second electric capacity and audion,
One end of described button is connected with the first resistance, the other end ground connection of described button, the other end of described first resistance and three poles
The colelctor electrode of pipe connects, the grounded emitter of described audion, the base stage of audion and the 3rd resistance one end, second electric capacity one end
Connecting, described 3rd resistance other end ground connection, the described second electric capacity other end is connected with power supply, and described second resistance is connected to electricity
Between source and the colelctor electrode of audion, described first electric capacity is connected between the collector and emitter of audion, and described first
Electric capacity also ground connection.
Further, the resistance of described first resistance and the 3rd resistance is equal, and the resistance of described second resistance is the first electricity
10 times of resistance resistance.
Further, described audion is NPN audion.
Compared with prior art, the utility model has the advantage of: this utility model in use, uses audion to realize
Resetting when powering on, hand-reset after using button to realize powering on, circuit entirety has that reliability is high and non-damageable advantage.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of the reset circuit of point reader described in the utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature, thus protection domain of the present utility model is made apparent clearly
Define.
Refering to shown in Fig. 1, this utility model provides the reset circuit of a kind of point reader, including button S1, first to the 3rd
Resistance R1-R3, first and second electric capacity C1, C2 and audion Q1, one end of described button S1 is connected with the first resistance R1, described
The other end ground connection of button S1, the described other end of the first resistance R1 is connected with the colelctor electrode of audion Q1, described audion Q1
Grounded emitter, the base stage of audion Q1 is connected with the 3rd resistance R3 one end, second electric capacity C2 one end, described 3rd resistance R3
Other end ground connection, the described second electric capacity C2 other end is connected with power supply DVCC, described second resistance R2 be connected to power supply DVCC and
Between the colelctor electrode of audion Q1, described first electric capacity C1 is connected between the collector and emitter of audion, and described first
Electric capacity C1 also ground connection.
The resistance of described first resistance R1 and the 3rd resistance R3 is equal, and the resistance of described second resistance R2 is the first resistance R1
10 times of resistance.As preferably, the first resistance R1 and the 3rd resistance R3 uses 10K Ω, the second resistance R2 to use 100K Ω.
As preferably, described audion Q1 is NPN audion.
The operation principle of the reset circuit of point reader of the present utility model is: reset when audion Q1 is a powering up.Open
During machine, electric capacity C2 charges, audion Q1 output low level, produces and resets, and after electric capacity C2 is full of, audion Q1 ends, and resets dynamic
Work terminates.Button S1 is already powered on system reset.
This utility model in use, uses audion to reset when realizing powering on, manually multiple after using button to realize powering on
Position, circuit entirety has that reliability is high and non-damageable advantage.
Although being described in conjunction with the accompanying embodiment of the present utility model, but patent owner can want in appended right
Various deformation or amendment is made, as long as less than the protection model described by claim of the present utility model within the scope of asking
Enclose, all should be within protection domain of the present utility model.
Claims (3)
1. the reset circuit of a point reader, it is characterised in that: include button, the first to the 3rd resistance, the first and second electric capacity
And audion, one end of described button is connected with the first resistance, the other end ground connection of described button, another of described first resistance
End is connected with the colelctor electrode of audion, the grounded emitter of described audion, the base stage of audion and the 3rd resistance one end, second
Electric capacity one end connects, and described 3rd resistance other end ground connection, the described second electric capacity other end is connected with power supply, described second resistance
Being connected between power supply and the colelctor electrode of audion, described first electric capacity is connected between the collector and emitter of audion,
Described first electric capacity also ground connection.
The reset circuit of point reader the most according to claim 1, it is characterised in that: described first resistance and the 3rd resistance
Resistance is equal, resistance is the first resistance 10 times of described second resistance.
The reset circuit of point reader the most according to claim 1, it is characterised in that: described audion is NPN audion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620720022.XU CN205883183U (en) | 2016-07-09 | 2016-07-09 | Point -reading machine's reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620720022.XU CN205883183U (en) | 2016-07-09 | 2016-07-09 | Point -reading machine's reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205883183U true CN205883183U (en) | 2017-01-11 |
Family
ID=57695432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620720022.XU Expired - Fee Related CN205883183U (en) | 2016-07-09 | 2016-07-09 | Point -reading machine's reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205883183U (en) |
-
2016
- 2016-07-09 CN CN201620720022.XU patent/CN205883183U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204517702U (en) | A kind of anti-battery reversal connection circuit | |
| CN203963189U (en) | Be applied to the self locking type control circuit that valve is controlled | |
| CN106026259A (en) | Charging control circuit and charging device of electronic equipment | |
| CN205883183U (en) | Point -reading machine's reset circuit | |
| CN202014132U (en) | Power source switching circuit | |
| CN203013261U (en) | Intelligent mobile hard disk | |
| CN207074888U (en) | A kind of LED display power supply backup circuit | |
| CN207937526U (en) | Power-fail detection circuit on charging pile | |
| CN205040009U (en) | Microphone and input circuit that makes an uproar falls thereof | |
| CN204517782U (en) | A kind of switching circuit and there is the terminal of this circuit | |
| CN201733130U (en) | Power supply management module circuit | |
| CN204859558U (en) | Hearing aid | |
| CN219697612U (en) | Low-power-consumption power amplifier main board circuit | |
| CN203278645U (en) | Power supply device provided with dynamic balance power supply circuit | |
| CN103581800A (en) | Device capable of preventing reverse connection of single-end audio input interface | |
| CN204439729U (en) | A kind of examination hall communication apparatus detector circuit | |
| CN204496018U (en) | A kind of low cost concealed wire detector circuit | |
| CN209913791U (en) | Novel LCL filter circuit | |
| CN101425697B (en) | Charging circuit | |
| CN207266006U (en) | A kind of location watch information-processing circuit | |
| CN207354222U (en) | The power amplification circuit of loudspeaker | |
| CN208521604U (en) | One kind exempting from external electric moveable hard-disk cartridge | |
| CN205304609U (en) | Voltage feedback control system | |
| CN202524070U (en) | Protective circuit for preventing reverse connection of accumulator | |
| CN104601120A (en) | Audio power amplifier with small degree of distortion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20210709 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |