CN207475524U - A kind of adjustable switch circuit based on linear hall sensor - Google Patents
A kind of adjustable switch circuit based on linear hall sensor Download PDFInfo
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- CN207475524U CN207475524U CN201820032855.6U CN201820032855U CN207475524U CN 207475524 U CN207475524 U CN 207475524U CN 201820032855 U CN201820032855 U CN 201820032855U CN 207475524 U CN207475524 U CN 207475524U
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- resistance
- hall sensor
- operational amplifier
- resistor
- adjustable switch
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Abstract
The utility model discloses a kind of adjustable switch circuits based on linear hall sensor, it is characterized in that, including Hall sensor, first resistor, second resistance, 3rd resistor, 4th resistance and operational amplifier, the vdd terminal access 5V supply voltages of the Hall sensor, the GND ends ground connection of the Hall sensor, the normal phase input end of operational amplifier is accessed at the VOUT ends of the Hall sensor by 3rd resistor, the reverse input end of the operational amplifier is grounded by second resistance, the output terminal of the operational amplifier passes sequentially through first resistor, second resistance is grounded, the output terminal of the operational amplifier is linked by the 4th resistance in microcontroller.This circuit can frequently using potentiometer product in use, have long lifespan, it is easy for installation, it is highly reliable the characteristics of.
Description
Technical field
The utility model belongs to regulating switch field, and in particular to a kind of adjustable switch based on linear hall sensor
Circuit.
Background technology
The application field of adjustable potentiometer is very wide at present, including power supply, household electrical appliances, automobile product, communication products, digital product
Etc. various electric appliances, all can on the controllers such as speed adjusting, volume adjustment, the adjusting of lamplight brightness, voltage and current adjusting for another example
Using to potentiometer, and contact, mechanical mechanism etc. can all be worn when contact-cup anemometer use.Such as in adjustable rotating speed
On electric drill, product can such as use conventional contact resistance potentiometer, frequent by the rotating speed of the depth adjustment electric drill of button pressure
Adjusting or switch can make the continuous friction of contact point, influence its contact performance, will be damaged after certain Rubbing number.Thus
It is proposed that a kind of adjustable switch circuit based on linear hall sensor is used to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of adjustable switch circuits based on linear hall sensor to solve
The problems mentioned above in the background art.
In order to solve the above technical problems, the utility model employs following technical solution：One kind is passed based on linear Hall
The adjustable switch circuit of sensor, which is characterized in that including Hall sensor, first resistor, second resistance, 3rd resistor,
Four resistance and operational amplifier, the vdd terminal access 5V supply voltages of the Hall sensor, the GND ends of the Hall sensor
The normal phase input end of operational amplifier is accessed at ground connection, the VOUT ends of the Hall sensor by 3rd resistor, and the operation is put
The reverse input end of big device is grounded by second resistance, and the output terminal of the operational amplifier passes sequentially through first resistor, second
Resistance eutral grounding, the output terminal of the operational amplifier are linked by the 4th resistance in microcontroller.
Preferably, the resistance value of the first resistor is 9k ohm, and the resistance value of second resistance is 5k ohm, 3rd resistor and the
The resistance value of four resistance is equal.
Compared with prior art, the beneficial effects of the utility model are：One kind provided by the utility model is based on linearly suddenly
The adjustable switch circuit of your sensor adds Hall sensor in circuit, and Hall sensor has small power consumption, shatter-proof
It is dynamic, it is not afraid of the pollution such as dust, greasy dirt or corrosion, the Hall sensor in circuit is mounted on button bottom case, it is embedded on button
Magnet, when button is slowly depressed, magnet is nearer apart from Hall sensor, and hall electromotive force is bigger, and Hall conducts electricity kinetic potential again
It is input to microcontroller by operational amplifier amplification or adjusts in circuit and regulatory function can be realized.This circuit can be frequent
Using being used in the product of potentiometer, there is long lifespan, it is easy for installation, it is highly reliable the characteristics of.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not form the limitation to the utility model together.In the accompanying drawings：
Fig. 1 is a kind of electrical principle of adjustable switch circuit based on linear hall sensor provided by the utility model
Figure.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is described in further detail the utility model.It should be appreciated that specific embodiment described herein is only used to solve
The utility model is released, does not limit the utility model.
With reference to specific embodiment, the utility model is expanded on further.It is new that these embodiments are merely to illustrate this practicality
Type rather than limitation the scope of the utility model.In the description of the present invention, it should be noted that unless otherwise clear and definite
Regulation and restriction, term " installation ", " being equipped with ", " connection " should be interpreted broadly, can also for example, it may be fixedly connected
It is to be detachably connected or be integrally connected；It can be directly connected, can also be indirectly connected by intermediary, can be two
Connection inside a element.For the ordinary skill in the art, above-mentioned term can be understood in this reality with concrete condition
With the concrete meaning in novel.
As shown in Figure 1, a kind of adjustable switch circuit based on linear hall sensor, including Hall sensor
SS495A, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4 and operational amplifier LM324_SMD, Hall
The vdd terminal access 5V supply voltages of sensor SS495A, the GND ends ground connection of Hall sensor SS495A, Hall sensor
The VOUT ends of SS495A access the normal phase input end of operational amplifier LM324_SMD, the operation amplifier by 3rd resistor R3
The reverse input end of device LM324_SMD is grounded by second resistance R2, and the output terminal of operational amplifier LM324_SMD passes sequentially through
First resistor R1, second resistance R2 are grounded, and the output terminal of the operational amplifier LM324_SMD is linked by the 4th resistance R4
In microcontroller.
Wherein, the resistance value of first resistor R1 is 9k ohm, and the resistance value of second resistance R2 is 5k ohm, 3rd resistor R3 and the
The resistance value of four resistance R4 is equal.
In the present embodiment, Hall sensor SS495A is added in circuit, by the Hall sensor in circuit
SS495A is mounted on button bottom case, and embedded magnet on button, when button is slowly depressed, magnet can be close to Hall element
SS495A, magnet is nearer apart from Hall sensor SS495A, and hall electromotive force is bigger, and Hall conducts electricity kinetic potential using operation amplifier
Device LM324_SMD amplifications, which are input to microcontroller or adjust in circuit, can be realized regulatory function, even if Hall sensor in this way
The voltage change range of SS495A output terminals is small, can also be handled voltage amplification by operational amplifier LM324_SMD, operation
The output terminal of amplifier LM324_SMD is linked into microcontroller or is adjusted in circuit by resistance R4 realizes regulatory function.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
It modifies to the technical solution recorded in foregoing embodiments or equivalent replacement is carried out to which part technical characteristic.It is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this practicality
Within novel protection domain.
Claims (2)
1. a kind of adjustable switch circuit based on linear hall sensor, which is characterized in that including Hall sensor, the first electricity
Resistance, second resistance, 3rd resistor, the 4th resistance and operational amplifier, the vdd terminal access 5V power supply electricity of the Hall sensor
Pressure, the GND ends ground connection of the Hall sensor, operational amplifier is accessed in the VOUT ends of the Hall sensor by 3rd resistor
Normal phase input end, the reverse input end of the operational amplifier is grounded by second resistance, the output of the operational amplifier
End passes sequentially through first resistor, second resistance ground connection, and the output terminal of the operational amplifier is linked into monolithic by the 4th resistance
In machine.
A kind of 2. adjustable switch circuit based on linear hall sensor according to claim 1, which is characterized in that institute
The resistance value for stating first resistor is 9k ohm, and the resistance value of second resistance is 5k ohm, and 3rd resistor is equal with the resistance value of the 4th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032855.6U CN207475524U (en) | 2018-01-09 | 2018-01-09 | A kind of adjustable switch circuit based on linear hall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032855.6U CN207475524U (en) | 2018-01-09 | 2018-01-09 | A kind of adjustable switch circuit based on linear hall sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207475524U true CN207475524U (en) | 2018-06-08 |
Family
ID=62257648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820032855.6U Active CN207475524U (en) | 2018-01-09 | 2018-01-09 | A kind of adjustable switch circuit based on linear hall sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207475524U (en) |
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2018
- 2018-01-09 CN CN201820032855.6U patent/CN207475524U/en active Active
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