CN205792491U - A kind of square-wave generator based on intervalometer - Google Patents
A kind of square-wave generator based on intervalometer Download PDFInfo
- Publication number
- CN205792491U CN205792491U CN201620669426.0U CN201620669426U CN205792491U CN 205792491 U CN205792491 U CN 205792491U CN 201620669426 U CN201620669426 U CN 201620669426U CN 205792491 U CN205792491 U CN 205792491U
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- intervalometer
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- circuit
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Abstract
nullThis utility model discloses a kind of square-wave generator based on intervalometer，Including the oscillating circuit powered with intervalometer 555 as core and by mu balanced circuit，The supply pin of this intervalometer 555 is connected with the foot that resets of intervalometer 555 and is connected to the outfan of mu balanced circuit，The grounding leg ground connection of intervalometer 555，The foot that triggers of intervalometer 555 is connected and through electric capacity C4 ground connection with the replacement locking foot of intervalometer 555，The control foot meridian capacitor C5 ground connection of intervalometer 555，The electric discharge foot of intervalometer 555 connects the outfan of mu balanced circuit through variable resistance R5，And the electric discharge foot of intervalometer 555 connects the replacement locking foot triggering foot and intervalometer 555 of intervalometer 555 through resistance R6，The output pin of intervalometer 555 is drawn the outfan of oscillating circuit and is exported square wave，Resistance R6 therein is parallel with diode D5，The anode of this diode D5 connects the electric discharge foot of intervalometer 555，The negative electrode of diode D5 connects the replacement locking foot triggering foot and intervalometer 555 of intervalometer 555.This utility model can get high-quality square wave, and its circuit is simple, and cost is relatively low.
Description
Technical field
This utility model relates to applications of electronic circuitry technology, particularly to a kind of square-wave generator.
Background technology
Square wave is conventional signal source, and common producing method is by crystal oscillator sine wave output, through the most anti-phase and whole
Square wave is obtained after shape.This square wave generation circuit needs more element, and circuit structure is complex, and production cost is higher, because of
This is necessary to improve.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of square-wave generator, in order to simplifies circuit structure, reduces
Circuit cost.
For solving above-mentioned technical problem, this utility model provides a kind of square-wave generator based on intervalometer, including with fixed
Time device 555 be core the oscillating circuit powered by mu balanced circuit, the supply pin of this intervalometer 555 and the replacement of intervalometer 555
Foot is connected and is connected to the outfan of mu balanced circuit, the grounding leg ground connection of intervalometer 555, the triggering foot of intervalometer 555 and intervalometer
The replacement locking foot of 555 is connected and through electric capacity C4 ground connection, the control foot meridian capacitor C5 ground connection of intervalometer 555, putting of intervalometer 555
Electricity foot connects the outfan of mu balanced circuit through variable resistance R5, and the electric discharge foot of intervalometer 555 connects intervalometer 555 through resistance R6
Triggering the replacement locking foot of foot and intervalometer 555, the output pin of intervalometer 555 draws the outfan side of output of oscillating circuit
Ripple, resistance R6 therein is parallel with diode D5, and the anode of this diode D5 connects the electric discharge foot of intervalometer 555, diode D5's
Negative electrode connects the replacement locking foot triggering foot and intervalometer 555 of intervalometer 555.
Compared with prior art, square-wave generator of the present utility model is with localizer 555 as core, and configuration is a small amount of peripheral first
Part forms oscillating circuit, in order to obtains presetting the square wave of dutycycle, has circuit advantage simple, lower-cost.Especially,
This square-wave generator employing mu balanced circuit provides stable input voltage, it is simple to guarantor's wave mass.Additionally, square-wave generator
It uses mains-supplied, and range of application is wider.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of this utility model square-wave generator one preferred embodiment；
Fig. 2 is the circuit diagram of AC-DC circuit in Fig. 1；
Fig. 3 is the circuit diagram of mu balanced circuit in Fig. 1；
Fig. 4 is the circuit diagram of oscillating circuit in Fig. 1.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the technical solution of the utility model, below in conjunction with the accompanying drawings and tool
The utility model is described in further detail for body embodiment.
See Fig. 1, for the circuit diagram of this utility model square-wave generator one preferred embodiment.This square-wave generator includes depending on
The AC-DC circuit 100 of secondary connection, mu balanced circuit 200 and oscillating circuit 300, wherein civil power 220V is exchanged by AC-DC circuit 100
Electricity (AC) is changed into unidirectional current (DC), and the unidirectional current voltage stabilizing that AC-DC circuit 100 is exported by mu balanced circuit 200 is at setting voltage value
(scope), oscillating circuit 300 is powered by mu balanced circuit 200 and exports the square wave setting dutycycle.Described AC-DC circuit 100,
Mu balanced circuit 200 and oscillating circuit 300 all can multiple different circuit structure, below citing illustrate.
See Fig. 2, for the circuit diagram of AC-DC circuit in Fig. 1.The alternating current 220V of civil power is changed by this AC-DC circuit 100
For unidirectional current (such as≤28V), in order to be supplied to the input of mu balanced circuit 200.This AC-DC circuit 100 includes being sequentially connected with
Reduction voltage circuit, rectification circuit and filter circuit, wherein reduction voltage circuit includes transformator B1, and it is by 220V alternating current blood pressure lowering；Rectification
Commutation diode D1 that circuit is connected by four bridge-types, D2,
D3 and D4 is constituted, and the AC rectification after blood pressure lowering is unidirectional current by it；Filter circuit include series connection resistance R1 and
Filter capacitor C1 (draws between outfan self-resistance R1 and filter capacitor C1), and it is in order to filter the clutter in unidirectional current.Permissible
Being understood by, AC-DC circuit 100 can also take other circuit form, does not repeats them here.
See Fig. 3, for the circuit diagram of mu balanced circuit in Fig. 1.This mu balanced circuit 200 voltage stabilizing in setting voltage value (scope),
Such as+9V, its concrete circuit structure is: mu balanced circuit 200 includes that three terminal integrated voltage stabilizer CW317 is (for adjustable positive output three end
Integrated regulator), wherein the input pin (Vin) 1 of three terminal integrated voltage stabilizer CW317 was connected resistance R2 and was connect the defeated of AC-DC circuit
Go out end (adjusting resistance R2 and the ratio of resistance R1, different input values and output valve can be obtained), and three terminal integrated voltage stabilizer
The input pin 1 of CW317 through electric capacity C2 ground connection, the adjustment foot (ADJ) 2 of three terminal integrated voltage stabilizer CW317 through variable resistance R3 ground connection,
The output pin (Vout) 3 of three terminal integrated voltage stabilizer CW317 draws the outfan of mu balanced circuit, and resistance R4 is connected to three end integrated voltage-stabilizeds
Device CW317 adjusts between foot 2 and the output pin 3 of three terminal integrated voltage stabilizer CW317, and electric capacity C3 is connected to three terminal integrated voltage stabilizer
Between output pin and the ground of CW317.This embodiment, with three terminal integrated voltage stabilizer CW317 as core, configures a small amount of peripheral cell
Build mu balanced circuit 200, contribute to making product simplification structure, reducing volume and reduce the cost.
See Fig. 4, for the circuit diagram of oscillating circuit in Fig. 1.This oscillating circuit 300 is powered by mu balanced circuit 200 and exports
Set the square wave of dutycycle.This oscillating circuit 300 is with intervalometer 555 as core, and configures a small amount of peripheral cell to form vibration
Circuit produces square wave.The particular circuit configurations of this oscillating circuit 300 is: the supply pin (VCC) 8 of intervalometer 555 and intervalometer
The replacement foot 4 (Reset) of 555 is connected and is connected to the outfan (such as+9V) of mu balanced circuit, the grounding leg (GND) 1 of intervalometer 555
Replacement locking foot (Threshold) 6 of ground connection, the triggering foot (Trigger) 2 of intervalometer 555 and intervalometer 555 is connected and through electricity
Holding C4 ground connection, the control foot (Control) 5 of intervalometer 555 is through electric capacity C5 ground connection, the electric discharge foot (Discharge) of intervalometer 555
7 connect the outfan of mu balanced circuit through variable resistance R5, and the electric discharge foot 7 of intervalometer 555 is through resistance R6 (resistance R6 parallel diode
D5) the replacement locking foot 6 triggering foot 2 and intervalometer 555 of intervalometer 555, the output pin (Output) 3 of intervalometer 555 are connected
Draw the outfan of oscillating circuit, by exporting the square wave setting dutycycle.The operation principle of this oscillating circuit 300 is: steady
The output voltage of volt circuit 200 charges to electric capacity C4 through resistance-variable resistance R5, R6, when electric capacity C4 voltage rises to intervalometer
555 upper limit threshold (2/3VCC) time, in intervalometer 555 voltage comparator output high level so that intervalometer 555 is defeated
Go out for low level, at this moment the discharge tube conducting within intervalometer 555 so that electric capacity C4 is discharged by discharge tube through resistance R6；When
When the voltage of electric capacity C1 drops to 1/3VCC, intervalometer 555 is output as high level, and makes discharge tube disconnect；Circuit repeats above-mentioned
Process, thus causes vibration, and the square wave (rectangular pulse) of output is available for the use of subsequent conditioning circuit.
Conveniently, depending on Component selection in above-described embodiment and parameter need according to application, its computational methods
Known by those skilled in the art, do not repeating at this.
Although this utility model is open as above with preferred embodiment, but it is not for limiting this utility model, any
Those skilled in the art, without departing from spirit and scope of the present utility model, can make possible variation and amendment, because of
This protection domain of the present utility model should be defined in the range of standard with this utility model claim.
Claims (1)
1. a square-wave generator based on intervalometer, it is characterised in that include with intervalometer 555 as core and by mu balanced circuit
The foot that resets of the oscillating circuit of power supply, the supply pin of this intervalometer 555 and intervalometer 555 is connected and is connected to the output of mu balanced circuit
End, the grounding leg ground connection of intervalometer 555, the foot that triggers of intervalometer 555 is connected and through electric capacity with the replacement locking foot of intervalometer 555
C4 ground connection, the control foot meridian capacitor C5 ground connection of intervalometer 555, the electric discharge foot of intervalometer 555 connects mu balanced circuit through variable resistance R5
Outfan, and the electric discharge foot 7 of intervalometer 555 connects the replacement lock triggering foot and intervalometer 555 of intervalometer 555 through resistance R6
Determining foot, the output pin of intervalometer 555 is drawn the outfan of oscillating circuit and is exported square wave, and resistance R6 therein is parallel with diode
The anode of D5, this diode D5 connects the electric discharge foot of intervalometer 555, and the negative electrode of diode D5 connects the triggering foot of intervalometer 555 and determines
Time device 555 replacement locking foot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620669426.0U CN205792491U (en) | 2016-06-25 | 2016-06-25 | A kind of square-wave generator based on intervalometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620669426.0U CN205792491U (en) | 2016-06-25 | 2016-06-25 | A kind of square-wave generator based on intervalometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205792491U true CN205792491U (en) | 2016-12-07 |
Family
ID=58127767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620669426.0U Expired - Fee Related CN205792491U (en) | 2016-06-25 | 2016-06-25 | A kind of square-wave generator based on intervalometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205792491U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464413A (en) * | 2021-07-14 | 2021-10-01 | 东莞市凯格精机股份有限公司 | Alcohol flow controller |
-
2016
- 2016-06-25 CN CN201620669426.0U patent/CN205792491U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464413A (en) * | 2021-07-14 | 2021-10-01 | 东莞市凯格精机股份有限公司 | Alcohol flow controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20170625 |