CN206212260U - A kind of volume indicating circuit - Google Patents
A kind of volume indicating circuit Download PDFInfo
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- CN206212260U CN206212260U CN201621299537.3U CN201621299537U CN206212260U CN 206212260 U CN206212260 U CN 206212260U CN 201621299537 U CN201621299537 U CN 201621299537U CN 206212260 U CN206212260 U CN 206212260U
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- divider resistance
- resistance
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- light
- emitting component
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Abstract
The utility model discloses a kind of volume indicating circuit, including two-stage amplifying circuit, the signal input part connection audio input end of first order amplifying circuit, signal output part connect the signal input part of second level amplifying circuit；More than one divider resistance is concatenated in the amplifying return circuit of second level amplifying circuit；Each divider resistance difference light-emitting component in parallel.Advantage is after the voltage of the signal volume of audio frequency apparatus is amplified by two grades, current signal to be presented as at each and every one divider resistances many.When the voltage of signal volume changes, can rapidly and accurately occur different voltage drops at multiple divider resistances, when the voltage drop at certain divider resistance two ends reaches the threshold value of the light-emitting component in parallel, you can show the level of sound volume by optical signal.Volume is bigger, and the voltage of its signal volume is bigger, and the pressure drop fed back on each divider resistance is bigger, therefore the light-emitting component being independently connected in parallel on each divider resistance can be lighted successively.
Description
Technical field
The utility model is related to a kind of electronic circuit, more particularly to a kind of circuit of instruction volume.
Background technology
With the development and technological progress of society, various electronic products and various consumer electronicses largely occur, enter into
In people's daily life and production work, some equipment with acoustic function except have to auditory function it is required in addition to, also to regarding
Feel that function also has certain requirement.The size of audible sound is allowed how to be converted into the effect of vision, this just proposes one to design
Great challenge.
Utility model content
In order to solve the above-mentioned technical problem, the utility model purpose is to provide a kind of volume indicating circuit.
A kind of volume indicating circuit described in the utility model, it is characterised in that including two-stage amplifying circuit, the first order is put
The signal input part connection audio input end of big circuit, signal output part connect the signal input part of second level amplifying circuit；The
More than one divider resistance is concatenated in the amplifying return circuit of second amplifying circuit；Parallel connection one is luminous first respectively for each divider resistance
Part.
Preferably, described light-emitting component is light emitting diode.
Preferably, the resistance of each described divider resistance is different.
Preferably, the resistance of each described divider resistance is successively decreased successively to power supply direction.Different resistance partial pressures make hair
The voltage change at optical element two ends is more obvious, and the display to volume change is sensitiveer.
Preferably, described first order amplifying circuit and second level amplifying circuit is amplified using triode；First triode
Base stage connects audio input end, colelctor electrode connection power supply, and radio pole is by the second transistor base of first resistor connection, by the
Two resistance eutral groundings；Second transistor collector passes sequentially through first, second, third divider resistance connection power supply, radio pole ground connection；
The first light-emitting component of first divider resistance two ends parallel connection, the second light-emitting component of the second divider resistance two ends parallel connection, the 3rd partial pressure electricity
The 3rd light-emitting component of resistance two ends parallel connection.
Preferably, described first resistor and second resistance are adjustable resistor.Can be made whole by adjusting the resistance of resistance
Individual indicating circuit impedance changes, and is more flexibly adapted to different audio frequency apparatuses.
The utility model advantage is, after the voltage of the signal volume of audio frequency apparatus is amplified by two grades, in multiple
Current signal is presented as at individual divider resistance.When the voltage of signal volume changes, can rapidly and accurately in multiple divider resistances
There are different voltage drops in place, when the voltage drop at certain divider resistance two ends reaches the threshold value of the light-emitting component in parallel, you can logical
Cross optical signal and show the level of sound volume.Volume is bigger, and the voltage of its signal volume is bigger, feeds back on each divider resistance
Pressure drop is bigger, therefore the light-emitting component being independently connected in parallel on each divider resistance can be lighted successively.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present utility model.
Specific embodiment
Volume indicating circuit described in the utility model, as shown in figure 1, including by electric capacity C1, resistance R1 and the one or three pole
The first order amplifying circuit of pipe Q1 compositions.First triode Q1 connects volume input Ui, base stage and colelctor electrode by electric capacity C1
Between parallel resistance R1, colelctor electrode connection power supply V+, radio pole be grounded by adjustable resistor R5.
Second level amplifying circuit is made up of electric capacity C2 adjustable resistors R6 and the second triode Q2.The base of the second triode Q2
Pole passes sequentially through the radio pole that resistance R6, electric capacity C2 connect the first triode Q1, three divider resistance R2 of colelctor electrode connection concatenation,
Power supply V+, radio pole ground connection are connected after R3, R4.
In the first LED 1 of the first divider resistance R2 two ends parallel connection, the and divider resistance R3 two ends parallel connections the
Two LEDs 2, in the 3rd LED 3 of the 3rd divider resistance R4 two ends parallel connection.Wherein three divider resistances
Resistance it is different two-by-two, successively decrease to power supply V+ successively.
The operation principle of circuit described in the utility model is：Audio signal Ui is the input signal of power amplifier loudspeaker, this signal
Sent outside sound by power amplifier and loudspeaker, while also by the instruction of the utility model circuit realiration volume, signal Ui warps
Electric capacity C1 enters one-level amplifying circuit.After so audio signal Ui amplifies through the second triode Q2, the change of its voltage swing turns
Turn to the change of current signal size.Because divider resistance R2, the resistance value of R3, R4 are different, same electric current is at resistance two ends
The pressure drop of generation is different, when Vf value of the first divider resistance R2 two ends pressure drops more than the first LED 1, LED1 points
It is bright.Similarly after electric current reaches to a certain degree, LED2 and LED3 both end voltages can all be lighted when being higher than respective Vf values.So
The change of quantity and brightness follow current size that LED is lighted and change so that realize indicate volume function.
For a person skilled in the art, technical scheme that can be as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the guarantor that should all belong to the utility model claim
Within the scope of shield.
Claims (6)
1. a kind of volume indicating circuit, it is characterised in that including two-stage amplifying circuit, the signal input part of first order amplifying circuit
Connection audio input end, signal output part connect the signal input part of second level amplifying circuit；The amplification of second level amplifying circuit
More than one divider resistance is concatenated in loop；Each divider resistance difference light-emitting component in parallel.
2. circuit according to claim 1, it is characterised in that described light-emitting component is light emitting diode.
3. circuit according to claim 1, it is characterised in that the resistance of each described divider resistance is different.
4. circuit according to claim 3, it is characterised in that the resistance of each described divider resistance to power supply direction according to
It is secondary to successively decrease.
5. according to any described circuits of claim 1-4, it is characterised in that described first order amplifying circuit and the second level are put
Big circuit is amplified using triode；First transistor base connects audio input end, colelctor electrode connection power supply, and radio pole is by the
One resistance is connected the second transistor base, is grounded by second resistance；Second transistor collector passes sequentially through first, second,
3rd divider resistance connects power supply, radio pole ground connection；The first light-emitting component of first divider resistance two ends parallel connection, the second divider resistance
The second light-emitting component of two ends parallel connection, the 3rd light-emitting component of the 3rd divider resistance two ends parallel connection.
6. circuit according to claim 5, it is characterised in that described first resistor and second resistance are adjustable economize on electricity
Resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621299537.3U CN206212260U (en) | 2016-11-30 | 2016-11-30 | A kind of volume indicating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621299537.3U CN206212260U (en) | 2016-11-30 | 2016-11-30 | A kind of volume indicating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206212260U true CN206212260U (en) | 2017-05-31 |
Family
ID=58751800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621299537.3U Active CN206212260U (en) | 2016-11-30 | 2016-11-30 | A kind of volume indicating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206212260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112000307A (en) * | 2020-08-11 | 2020-11-27 | 合肥马道信息科技有限公司 | Voice volume indicating system |
-
2016
- 2016-11-30 CN CN201621299537.3U patent/CN206212260U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112000307A (en) * | 2020-08-11 | 2020-11-27 | 合肥马道信息科技有限公司 | Voice volume indicating system |
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