CN207366621U - A kind of 20 grades of level indicating circuits of multiple input sources - Google Patents
A kind of 20 grades of level indicating circuits of multiple input sources Download PDFInfo
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- CN207366621U CN207366621U CN201721307348.0U CN201721307348U CN207366621U CN 207366621 U CN207366621 U CN 207366621U CN 201721307348 U CN201721307348 U CN 201721307348U CN 207366621 U CN207366621 U CN 207366621U
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Abstract
The utility model discloses a kind of 20 grades of level indicating circuits of multiple input sources, including level signal generation circuit, 10 grades of 0~2.5V level indicating circuits, 10 grades of 2.5V~3.5V level indicating circuits, 20 grades of level indicating circuits are formed using two pieces of Linear Points/columns, 10 grades of LED display drivers LM3914 cascades；It uses the level input source of touching delay-action switch circuit, three kinds of manual voltage regulation circuit, self-maintained circuit signal generating circuits as level indicating circuit, the change of level is intuitively presented with follow-up level indicating circuit during circuit is run, LED columns or the height reflection incoming signal level height of 2 points of LED can be can be visually seen, i.e. the vivid displaying circuit course of work can measure comparative analysis to three kinds of signal generating circuits again, circuit selection application is effectively carried out, circuit is small, stable；It is by setting short circuit cap, in that context it may be convenient to the electric current in detection circuit.
Description
Technical field：
The utility model belongs to level indicating circuit technical field, and 20 grades of level for being specifically related to a kind of multiple input sources refer to
Show circuit.
Background technology：
Level indicating circuit be by intuitively bright spot is how many or height in a manner of represent level height, existing level indicating
Circuit mainly has two kinds, and one of which is built with discrete component, mainly the application to diode, triode, such as Fig. 1 institutes
Show, work as Ui>During 0.6V~0.7V, VT1 is changed into turning on from ending, and LED1 is lighted, and later Ui often increases about 0.7V, and follow-up LED is just
One is lit, signal is intuitively shown with this, its circuit volume is larger, technically compared with based on；Another is
With the level indicating circuit built of dedicated IC chip, as shown in Fig. 2, the 4 grades of electricity built using integrated chip D1405
Flat indicating circuit, D1405 level indicatings drive integrated circult represents incoming signal level with 5 bar-shaped light emitting diodes, interior
Portion is equipped with the constant current output device that can directly drive LED, thus during change supply voltage, flowing through the electric current of light emitting diode will not send out
Changing.The circuit work power voltage range is wide, can be worked normally in 4.4~12V voltages.Internal direct current amplifier.Open
Ring gain>30DB.And the response time of lighting/light-off amplifications can be changed according to the resistance outside 15 foot of integrated package and capacitance
Utensil has very high input impedance, but its input source is single, it is impossible to compares and analyzes, it is impossible to the suitable electricity of selection on demand
Road.
Utility model content：
For this reason, the technical problem to be solved by the utility model is to level indicating circuit volume of the prior art it is big,
Input source is single, cannot compare and analyze, it is impossible to suitable circuit is selected on demand, so as to propose 20 grades of a kind of multiple input sources
Level indicating circuit.
To reach above-mentioned purpose, the technical solution of the utility model is as follows：
A kind of 20 grades of level indicating circuits of multiple input sources, including level signal generation circuit, 10 grades of 0~2.5V level refer to
Show circuit and 10 grades of 2.5V~3.5V level indicating circuits.
The level signal generation circuit is touching delay-action switch circuit or manual voltage regulation circuit or self-maintained circuit.
10 grades of 0~2.5V level indicating circuits include the first driving chip U1, first row type LEDU3, the 9th short circuit
Cap J9, first resistor R1, second resistance R2, the 4th resistance R4, the 5th resistance R5, the 7th short circuit cap J7, the first driving core
1 foot of piece U1,18 feet, 17 feet, 16 feet, 15 feet, 14 feet, 13 feet, 12 feet, 11 feet, 10 feet successively respectively with the first row type
11 feet, 12 feet, 13 feet, 14 feet, 15 feet, 16 feet, 17 feet, 18 feet, 19 feet, 20 feet of LEDU3 are connected, the first row type
- 10 foot of 1 foot of LEDU3 connects the cathode of direct voltage source U5, the second end connection described first of the second resistance R2 respectively
11 feet of driving chip U1,1 foot of the 9th short circuit cap J9 connect 11 feet of the first row type LEDU3, and the described 9th is short
2 feet of road cap J9 connect 1 foot of the first driving chip U1, and 6 feet of the first driving chip U1 connect the 4th resistance R4
First end, the first end of the 5th resistance R5 connects the first end of the 4th resistance R4, the of the 5th resistance R5
Two ends are grounded, and 6 feet of the first driving chip U1 obtain after the 4th resistance R4 and the 5th resistance R5 partial pressures
2.5V voltages, 4 feet and 8 feet of the first driving chip U1 are grounded respectively, the 2 feet ground connection of the first driving chip U1, institute
State the cathode of the 3 feet connection direct voltage source U5 of the first driving chip U1, the first electricity of 7 feet series connection of the first driving chip U1
1 foot of the 7th short circuit cap J7, the 2 feet ground connection of the 7th short circuit cap J7,5 feet of the first driving chip U1 are connected after resistance R1
1 foot of the 4th short circuit cap J4 is connected, 2 feet of the 4th short circuit cap J4 connect the tertiary voltage Vo3 in manual voltage regulation circuit, the
2 feet of one short circuit cap J1 connect 5 feet of the first driving chip U1, the 1 foot connection touching delay-action switch of the first short circuit cap J1
The second voltage Vo2 of the 3 feet connection self-maintained circuit of the first voltage Vo1, the first short circuit cap J1 of circuit, first driving
6 feet of the 9 feet connection double-point double-throw switch SW1 of chip U1.
10 grades of 2.5V~3.5V level indicating circuits include the second driving chip U2, second row type LEDU4, the tenth short
Road cap J10,3rd resistor R3, the 16th resistance R16, the 17th resistance R17, the 8th short circuit cap J8, second driving chip
1 foot of U2,18 feet, 17 feet, 16 feet, 15 feet, 14 feet, 13 feet, 12 feet, 11 feet, 10 feet successively respectively with the second row type
11 feet, 12 feet, 13 feet, 14 feet, 15 feet, 16 feet, 17 feet, 18 feet, 19 feet, 20 feet of LEDU4 are connected, the second row type
- 10 foot of 1 foot of LEDU4 connects the cathode of direct voltage source U5, the anode connection described second of the direct voltage source U5 respectively
10 feet of driving chip U2,1 foot of the tenth short circuit cap J10 connect 11 feet of the second row type LEDU4, and the described tenth is short
2 feet of road cap J10 connect 1 foot of the second driving chip U2, and 6 feet of the second driving chip U2 connect the 16th resistance
The first end of R16, the first end of first end connection the 16th resistance R16 of the 17th resistance R17, the described 17th
The second end ground connection of resistance R17,6 feet of the second driving chip U2 pass through the 16th resistance R16 and the described 17th
3.5V voltages are obtained after resistance R17 partial pressures, 4 feet and 8 feet of the second driving chip U2 connect first driving chip respectively
6 feet of U1, the 2 feet ground connection of the second driving chip U2, the 3 feet connection direct voltage source U5's of the second driving chip U2
Cathode, 1 foot of the 8th short circuit cap J8 is connected after the 7 feet series connection 3rd resistor R3 of the second driving chip U2, the described 8th is short
The 2 feet ground connection of road cap J8,1 foot of the 4th short circuit cap J4 of 5 feet connection of the second driving chip U2, the 2 of the first short circuit cap J1
Foot connects 5 feet of the second driving chip U2, and 9 feet of the second driving chip U2 connect the 3 of double-point double-throw switch SW1
Foot, 1 foot and 4 feet of the double-point double-throw switch SW1 connect the cathode of the direct voltage source U5 respectively, and the double-pole double throw is opened
2 feet for closing SW1 connect 11 feet of the second driving chip U2, and the 5 feet connection described second of the double-point double-throw switch SW1 is driven
1 foot of dynamic chip U2.
As the preferred of above-mentioned technical proposal, the first driving chip U1 and the second driving chip U2 choose
LED display drivers LM3914.
As the preferred of above-mentioned technical proposal, the resistance value of the 4th resistance R4 is 10k Ω, the resistance of the 5th resistance R5
It is worth for 10k Ω.
As the preferred of above-mentioned technical proposal, the resistance value of the 16th resistance R16 is 1k Ω, the 17th resistance
The resistance value of R17 is 2.5k Ω.
As the preferred of above-mentioned technical proposal, the touching delay-action switch circuit includes the first triode Q1, the two or three pole
Pipe Q2, the 3rd triode Q3, the second direct voltage source U6, the 3rd direct voltage source U7, the 6th resistance R6, the 7th resistance R7,
Eight resistance R8, the 9th resistance R9, the tenth resistance R11, the first capacitance C1, the first diode D1, the second adjustable resistance RV2, first
The base stage of triode Q1 connects the first end of the 11st resistance R11, and the collector of the first triode Q1 connects the 6th resistance R6's
First end, the emitter of the first triode Q1 connect 1 foot of the second adjustable resistance RV2, and the cathode of the second direct voltage source U6 connects
Connecing the collector of the first triode Q1, the anode of the second direct voltage source U6 understands the emitter of the first triode Q1, and the two or three
The base stage of pole pipe Q2 connects the emitter of the first triode Q1, and the collector of the second triode Q2 connects the first of the 7th resistance R7
End, the second end of the 7th resistance R7 connect the second end of the 6th resistance R6, and the emitter connection second of the 3rd triode Q2 is adjustable
2 feet of resistance RV2, the 3 feet ground connection of the second adjustable resistance RV2, the cathode of the 3rd direct voltage source U7 connect the second triode Q2
Collector, the anode of the 3rd direct voltage source U7 connects the emitter of the second triode Q2, the base stage string of the 3rd triode Q3
Join the collector that the second triode Q2 is connected after the 8th resistance R8, the emitter of the 3rd triode Q3 connects the of the first capacitance C1
One end, the second end of the first capacitance C1 connect the cathode of the 3rd direct voltage source U7, the collector connection of the 3rd triode Q3 the
The second end ground connection of first end connection the first voltage Vo1, the 9th resistance R9 of one voltage Vo1, the 9th resistance R9, the tenth resistance
The second end of first end connection the first voltage Vo1, the tenth resistance R10 of R10 connect the cathode of the first diode D1, the one or two pole
The anode ground connection of pipe D1.
As the preferred of above-mentioned technical proposal, the self-maintained circuit include the 4th triode Q4, the 5th triode Q5,
Second capacitance C2, the 3rd capacitance C3, the 12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, the 15th resistance
The collector of R15, the 4th triode Q4 connect the second end of the 3rd capacitance C3, and the emitter of the 4th triode Q4 is grounded, and the 4th
The base stage of triode Q4 connects the first end of the second capacitance C2, the second end connection second voltage Vo2 of the second capacitance C2, and the five or three
The emitter ground connection of collector connection the second voltage Vo2, the 5th triode Q5 of pole pipe Q5, the base stage connection of the 5th triode Q5
The first end of 3rd capacitance C3, the second end of the 3rd capacitance C3 connect the first end of the 12nd resistance R12, the 12nd resistance R12
Second segment connect the first end of the 13rd resistance R13, the second end of the 13rd resistance R13 connects the first of the 3rd capacitance C3
End, the first end of the 14th resistance R14 connect the first end of the 13rd resistance R13, the second end connection of the 14th resistance R14 the
The first end of two capacitance C2, the first end of the 15th resistance R15 connect the first end of the 13rd resistance R14, the 15th resistance R15
Second end connect the second capacitance C2 second end.
As the preferred of above-mentioned technical proposal, the manual voltage regulation circuit includes the first adjustable resistance RV1, and described first can
Adjust the 1 foot ground connection of resistance RV1, the 2 feet connection tertiary voltage Vo3 of the first adjustable resistance RV1.
The beneficial effects of the utility model are：It uses touching delay-action switch circuit, manual voltage regulation circuit, self-oscillation
Level input source of the three kinds of signal generating circuits of circuit as level indicating circuit, the change of level is with follow-up during circuit is run
Level indicating circuit intuitively present, the height reflection incoming signal level height of 2 points of LED columns or LED can be can be visually seen, i.e.,
The displaying circuit course of work of image can measure comparative analysis to three kinds of signal generating circuits again, effectively carry out circuit selection
Using circuit is small, stable；It is by setting short circuit cap, in that context it may be convenient to the electric current in detection circuit.
Brief description of the drawings：
The following drawings is only intended in doing schematic illustration and explanation to the utility model, does not limit the model of the utility model
Enclose.Wherein：
Fig. 1 is a kind of level indicating circuit figure built with discrete component in the prior art；
Fig. 2 is 4 grades of level indicating circuit figures that a kind of integrated chip D1405 is built in the prior art；
Fig. 3 is a kind of 20 grades of level indicating circuit schematic diagrams of multiple input sources of the utility model one embodiment；
Fig. 4 is a kind of 20 grades of level indicating circuit figures of multiple input sources of the utility model one embodiment；
Fig. 5 is the LM3914 application principle figures of the utility model one embodiment；
Fig. 6 is the touching delay-action switch circuit diagram of the utility model one embodiment；
Fig. 7 is the self-maintained circuit figure of the utility model one embodiment；
Fig. 8 is the manual voltage regulation circuit diagram of the utility model one embodiment；
Fig. 9 is the electric source filter circuit figure of the utility model one embodiment；
Figure 10 is a kind of 20 grades of level indicating circuit printed circuit boards of multiple input sources of the utility model one embodiment
Figure.
Embodiment：
As shown in Figure 3, Figure 4,20 grades of level indicating circuits of a kind of multiple input sources of the utility model, including level signal
Generation circuit, 10 grades of 0~2.5V level indicating circuits and 10 grades of 2.5V~3.5V level indicating circuits.
The level signal generation circuit is touching delay-action switch circuit or manual voltage regulation circuit or self-maintained circuit.
10 grades of 0~2.5V level indicating circuits include the first driving chip U1, first row type LEDU3, the 9th short circuit
Cap J9, first resistor R1, second resistance R2, the 4th resistance R4, the 5th resistance R5, the 7th short circuit cap J7, the first driving core
1 foot of piece U1,18 feet, 17 feet, 16 feet, 15 feet, 14 feet, 13 feet, 12 feet, 11 feet, 10 feet successively respectively with the first row type
11 feet, 12 feet, 13 feet, 14 feet, 15 feet, 16 feet, 17 feet, 18 feet, 19 feet, 20 feet of LEDU3 are connected, the first row type
- 10 foot of 1 foot of LEDU3 connects the cathode of direct voltage source U5, the second end connection described first of the second resistance R2 respectively
11 feet of driving chip U1,1 foot of the 9th short circuit cap J9 connect 11 feet of the first row type LEDU3, and the described 9th is short
2 feet of road cap J9 connect 1 foot of the first driving chip U1, and 6 feet of the first driving chip U1 connect the 4th resistance R4
First end, the first end of the 5th resistance R5 connects the first end of the 4th resistance R4, the of the 5th resistance R5
Two ends are grounded, and 6 feet of the first driving chip U1 obtain after the 4th resistance R4 and the 5th resistance R5 partial pressures
2.5V voltages, 4 feet and 8 feet of the first driving chip U1 are grounded respectively, the 2 feet ground connection of the first driving chip U1, institute
State the cathode of the 3 feet connection direct voltage source U5 of the first driving chip U1, the first electricity of 7 feet series connection of the first driving chip U1
1 foot of the 7th short circuit cap J7, the 2 feet ground connection of the 7th short circuit cap J7,5 feet of the first driving chip U1 are connected after resistance R1
1 foot of the 4th short circuit cap J4 is connected, 2 feet of the 4th short circuit cap J4 connect the tertiary voltage Vo3 in manual voltage regulation circuit, the
2 feet of one short circuit cap J1 connect 5 feet of the first driving chip U1, the 1 foot connection touching delay-action switch of the first short circuit cap J1
The second voltage Vo2 of the 3 feet connection self-maintained circuit of the first voltage Vo1, the first short circuit cap J1 of circuit, first driving
6 feet of the 9 feet connection double-point double-throw switch SW1 of chip U1.
10 grades of 2.5V~3.5V level indicating circuits include the second driving chip U2, second row type LEDU4, the tenth short
Road cap J10,3rd resistor R3, the 16th resistance R16, the 17th resistance R17, the 8th short circuit cap J8, second driving chip
1 foot of U2,18 feet, 17 feet, 16 feet, 15 feet, 14 feet, 13 feet, 12 feet, 11 feet, 10 feet successively respectively with the second row type
11 feet, 12 feet, 13 feet, 14 feet, 15 feet, 16 feet, 17 feet, 18 feet, 19 feet, 20 feet of LEDU4 are connected, the second row type
- 10 foot of 1 foot of LEDU4 connects the cathode of direct voltage source U5, the anode connection described second of the direct voltage source U5 respectively
10 feet of driving chip U2,1 foot of the tenth short circuit cap J10 connect 11 feet of the second row type LEDU4, and the described tenth is short
2 feet of road cap J10 connect 1 foot of the second driving chip U2, and 6 feet of the second driving chip U2 connect the 16th resistance
The first end of R16, the first end of first end connection the 16th resistance R16 of the 17th resistance R17, the described 17th
The second end ground connection of resistance R17,6 feet of the second driving chip U2 pass through the 16th resistance R16 and the described 17th
3.5V voltages are obtained after resistance R17 partial pressures, 4 feet and 8 feet of the second driving chip U2 connect first driving chip respectively
6 feet of U1, the 2 feet ground connection of the second driving chip U2, the 3 feet connection direct voltage source U5's of the second driving chip U2
Cathode, 1 foot of the 8th short circuit cap J8 is connected after the 7 feet series connection 3rd resistor R3 of the second driving chip U2, the described 8th is short
The 2 feet ground connection of road cap J8,1 foot of the 4th short circuit cap J4 of 5 feet connection of the second driving chip U2, the 2 of the first short circuit cap J1
Foot connects 5 feet of the second driving chip U2, and 9 feet of the second driving chip U2 connect the 3 of double-point double-throw switch SW1
Foot, 1 foot and 4 feet of the double-point double-throw switch SW1 connect the cathode of the direct voltage source U5 respectively, and the double-pole double throw is opened
2 feet for closing SW1 connect 11 feet of the second driving chip U2, and the 5 feet connection described second of the double-point double-throw switch SW1 is driven
1 foot of dynamic chip U2.
The first driving chip U1 and the second driving chip U2 choose LED display drivers LM3914.Such as Fig. 5
Shown, LM3914 is 10 LED drives, it can be converted to input analog amount digital output and drive 10
Light emitting diode shows to carry out a display or column.Be connected with 10 accurate divider resistances between 4 feet and 6 feet, 7 feet and 8 feet it
Between be a reference voltage source, 9 feet are point/column model selection, 9,11 feet connect (or 9 feet are hanging) shown for point-like, 9,3 foot phases
Strip is connected in show.The supply voltage scope of LM3914 is very wide, can be selected in the range of 3-18V, in practical application, usually takes
6—12V.5 feet are signal input part.And the anti-phase of internal 10 step voltage comparators is added to after internal high input impedance buffer
Input terminal, is biased on different comparative levels per the in-phase input end of step voltage comparator by a string of divider resistances, due to dividing
Piezoresistance is 1K Ω, therefore 10 grades of comparators linearly change into bit level.First 10 grades are the 10 of 0-2.5V in this circuit
Level instruction display, the i.e. 5 foot level of LM3914<LED does not work during 0.25V, when incoming level successively>0.25V、0.5V、0.75V、
When 1V, 1.25V, 1.5V, 1.75V, 2V, 2.25V, 2.5V, bright 1 LED, 2 LED (or the 2nd LED) ... 10 successively
LED (or the 10th LED).10 grades are 10 grades of 2.5-3.5V instruction displays afterwards, i.e. 5 foot level are successively>2.6V、2.7V、2.8V
V, when 2.9V, 3.0V, 3.1V, 3.2V, 3.3V, 3.4V, 3.5V, it is bright successively after 1 LED in 10 LED, 2 LED the (or the 2nd
A LED) ... 10 LED (or the 10th LED).The circuit flexibility is：(1) change 3-18V of supply voltage, change 4,6
Foot level can realize the level indicating circuit of different range.The brightness of (2) 10 LED can be adjusted by the outer connecting resistance R of 7,8 bipods
Section.10 times of electric current in R are substantially equal to by the electric current of each LED.When the luminous efficiency of LED is higher, electric current can be small
Some, to reduce power consumption.
The resistance value of the 4th resistance R4 is 10k Ω, and the resistance value of the 5th resistance R5 is 10k Ω.
The resistance value of the 16th resistance R16 is 1k Ω, and the resistance value of the 17th resistance R17 is 2.5k Ω.
As shown in fig. 6, the touching delay-action switch circuit includes the first triode Q1, the second triode Q2, the three or three pole
Pipe Q3, the second direct voltage source U6, the 3rd direct voltage source U7, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th
Resistance R9, the tenth resistance R11, the first capacitance C1, the first diode D1, the second adjustable resistance RV2, the base stage of the first triode Q1
The first end of the 11st resistance R11 is connected, the collector of the first triode Q1 connects the first end of the 6th resistance R6, the one or three pole
The emitter of pipe Q1 connects 1 foot of the second adjustable resistance RV2, and the cathode of the second direct voltage source U6 connects the first triode Q1's
Collector, the anode of the second direct voltage source U6 understand the emitter of the first triode Q1, the base stage connection of the second triode Q2
The emitter of first triode Q1, the collector of the second triode Q2 connect the first end of the 7th resistance R7, the 7th resistance R7's
Second end connects the second end of the 6th resistance R6, and the emitter of the 3rd triode Q2 connects 2 feet of the second adjustable resistance RV2, the
The 3 feet ground connection of two adjustable resistance RV2, the cathode of the 3rd direct voltage source U7 connect the collector of the second triode Q2, and the 3rd is straight
The anode of galvanic electricity potential source U7 connects the emitter of the second triode Q2, connects after the 8th resistance R8 of base series of the 3rd triode Q3
The collector of the second triode Q2 is connect, the emitter of the 3rd triode Q3 connects the first end of the first capacitance C1, the first capacitance C1
Second end connect the 3rd direct voltage source U7 cathode, the 3rd triode Q3 collector connection first voltage Vo1, the 9th electricity
Hinder the second end ground connection of the first end connection first voltage Vo1, the 9th resistance R9 of R9, the first end connection of the tenth resistance R10 the
The second end of one voltage Vo1, the tenth resistance R10 connects the cathode of the first diode D1, the anode ground connection of the first diode D1.
As shown in fig. 7, the self-maintained circuit includes the 4th triode Q4, the 5th triode Q5, the second capacitance C2, the
Three capacitance C3, the 12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the 4th triode Q4
Collector connect the second end of the 3rd capacitance C3, the emitter ground connection of the 4th triode Q4, the base stage of the 4th triode Q4 connects
The first end of the second capacitance C2 is connect, the collector of second end connection the second voltage Vo2, the 5th triode Q5 of the second capacitance C2 connect
The emitter ground connection of second voltage Vo2, the 5th triode Q5 are connect, the base stage of the 5th triode Q5 connects the first of the 3rd capacitance C3
End, the second end of the 3rd capacitance C3 connect the first end of the 12nd resistance R12, the second segment connection the tenth of the 12nd resistance R12
The first end of three resistance R13, the second end of the 13rd resistance R13 connect the first end of the 3rd capacitance C3, the 14th resistance R14's
First end connects the first end of the 13rd resistance R13, and the second end of the 14th resistance R14 connects the first end of the second capacitance C2,
The first end of 15th resistance R15 connects the first end of the 13rd resistance R14, the second end connection second of the 15th resistance R15
The second end of capacitance C2.
As shown in figure 8, the manual voltage regulation circuit includes the first adjustable resistance RV1, the 1 of the first adjustable resistance RV1
Foot is grounded, the 2 feet connection tertiary voltage Vo3 of the first adjustable resistance RV1.
Fig. 9 is electric source filter circuit.
Operation principle：
One of three kinds of level signal sources are selected by selected on-off circuit, as the incoming level of level indicating circuit, profit
20 grades of level indicating circuits are formed with two pieces of Linear Points/columns, 10 grades of LED display drivers LM3914 cascades.Three kinds of level signals
Generation circuit comparison basis, principle repeat no more.
Figure 10 is a kind of diagram of printed circuit board of 20 grades of level indicating circuits of multiple input sources in the present embodiment.
(1) power supply, circuit voltage 5V are met at mark 1；
The selection of (2) three kinds of voltage signal sources：Identify and selected at 3 for signal source, short circuit cap connects upper left and chooses touch circuit
Signal；Short circuit cap connects lower-left and chooses self-oscillating circuit signal；Short circuit cap connects right side and chooses manual conditioned circuit signal；
(3) the level indicating circuit course of work of touch signal：Identify 3 short circuit caps and connect upper left and choose touch circuit signal,
Power supply be powered after, with hand touching mark 2, it can be seen that 20 LED are from left to right lighted successively, then gradually by the right side turn left extinguishings (vacation
If LM3914 is operated in point-like pattern).
(4) the level indicating circuit course of work of self-maintained circuit：Short circuit cap connects 3 lower-lefts of mark and chooses self-oscillating circuit
Signal, power supply be powered after, circuit automatic running, made by the oscillator signal period that self-oscillating circuit parameter determines 20 LED from
It is left-to-right to light successively, then gradually turned left extinguishing (assuming that LM3914 is operated in point-like pattern) by the right side.
(5) the level indicating circuit course of work of voltage is manually adjusted；Short circuit cap connects the right side of mark 3 and chooses manual adjustable electric
Road signal, 5 adjustable resistance of rotating mark, it is assumed that voltage first increases and reduces again, and it is from left to right bright successively to can observe 20 LED
Rise, then gradually turned left extinguishing (assuming that LM3914 is operated in point-like pattern) by the right side.
(6) column or point-like level indicating mode select：Mark 6 is point/column condition selecting, and the button for identifying 6 is pressed
For cylinder mode, the button for identifying 6 is upspring as point-like pattern.
(7) electric current in measuring circuit：For mark 4 to survey current interface, universal meter can be sealed in by removing the short circuit cap at mark 4
Measure the electric current in corresponding outlet.
This circuit observability：
(1) level height is intuitively distinguished by lighting LED number or position.
(2) current monitoring point is equipped with, can such as facilitate the electric current in detection circuit by J7, J8, J9, J10 in Fig. 4.
A kind of 20 grades of level indicating circuits of multiple input sources described in the present embodiment, including level signal generation circuit, 10
0~2.5V of level level indicating circuits, 10 grades of 2.5V~3.5V level indicating circuits, are shown using two pieces of Linear Points/columns, 10 grades of LED
Show that driver LM3914 cascades form 20 grades of level indicating circuits；Its use touching delay-action switch circuit, manual voltage regulation circuit, from
Level input source of the three kinds of signal generating circuits of excited oscillation circuit as level indicating circuit, the change of level during circuit is run
Intuitively presented with follow-up level indicating circuit, the height reflection incoming signal level that can be visually seen 2 points of LED columns or LED is high
Low, i.e., the vivid displaying circuit course of work again can measure three kinds of signal generating circuits comparative analysis, circuit is small,
It is stable；It is by setting short circuit cap, in that context it may be convenient to the electric current in detection circuit；Three kinds of voltage signal generating sources are collected
Together, convenient study, and the effective ways and hand for saving teaching consumables cost, reducing environmental pollution, improving the quality of teaching
Section.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (7)
- A kind of 1. 20 grades of level indicating circuits of multiple input sources, it is characterised in that：Including level signal generation circuit, 10 grade 0~ 2.5V level indicating circuits and 10 grades of 2.5V~3.5V level indicating circuits；The level signal generation circuit is touching delay-action switch circuit or manual voltage regulation circuit or self-maintained circuit；10 grades of 0~2.5V level indicating circuits include the first driving chip U1, first row type LEDU3, the 9th short circuit cap J9, First resistor R1, second resistance R2, the 4th resistance R4, the 5th resistance R5, the 7th short circuit cap J7, the first driving chip U1's 1 foot, 18 feet, 17 feet, 16 feet, 15 feet, 14 feet, 13 feet, 12 feet, 11 feet, 10 feet are successively respectively with the first row type LEDU3's 11 feet, 12 feet, 13 feet, 14 feet, 15 feet, 16 feet, 17 feet, 18 feet, 19 feet, 20 feet are connected, and 1 foot of the first row type LEDU3- 10 feet connect the cathode of direct voltage source U5 respectively, and the second end of the second resistance R2 connects the first driving chip U1's 11 feet, 1 foot of the 9th short circuit cap J9 connect 11 feet of the first row type LEDU3, and 2 feet of the 9th short circuit cap J9 connect 1 foot of the first driving chip U1 is connect, 6 feet of the first driving chip U1 connect the first end of the 4th resistance R4, described The first end of 5th resistance R5 connects the first end of the 4th resistance R4, and the second end ground connection of the 5th resistance R5 is described 6 feet of first driving chip U1 after the 4th resistance R4 and the 5th resistance R5 partial pressures 2.5V voltages, described the 4 feet and 8 feet of one driving chip U1 are grounded respectively, the 2 feet ground connection of the first driving chip U1, the first driving chip U1 3 feet connection direct voltage source U5 cathode, connection the 7th is short after the 7 feet series connection first resistor R1 of the first driving chip U1 1 foot of road cap J7, the 2 feet ground connection of the 7th short circuit cap J7,5 feet of the first driving chip U1 connect the 4th short circuit cap J4 1 foot, the 4th short circuit cap J4 2 feet connection manual voltage regulation circuit in tertiary voltage Vo3,2 feet of the first short circuit cap J1 Connect 5 feet of the first driving chip U1, the first voltage of the 1 foot connection touching delay-action switch circuit of the first short circuit cap J1 9 feet of the second voltage Vo2, the first driving chip U1 of the 3 feet connection self-maintained circuit of Vo1, the first short circuit cap J1 connect Connect 6 feet of double-point double-throw switch SW1；10 grades of 2.5V~3.5V level indicating circuits include the second driving chip U2, second row type LEDU4, the tenth short circuit cap J10,3rd resistor R3, the 16th resistance R16, the 17th resistance R17, the 8th short circuit cap J8, the 1 of the second driving chip U2 Foot, 18 feet, 17 feet, 16 feet, 15 feet, 14 feet, 13 feet, 12 feet, 11 feet, 10 feet are successively respectively with the second row type LEDU4's 11 feet, 12 feet, 13 feet, 14 feet, 15 feet, 16 feet, 17 feet, 18 feet, 19 feet, 20 feet are connected, and 1 foot of the second row type LEDU4- 10 feet connect the cathode of direct voltage source U5 respectively, and the anode of the direct voltage source U5 connects the second driving chip U2's 10 feet, 1 foot of the tenth short circuit cap J10 connect 11 feet of the second row type LEDU4,2 feet of the tenth short circuit cap J10 1 foot of the second driving chip U2 is connected, 6 feet of the second driving chip U2 connect the first end of the 16th resistance R16, The first end of the 17th resistance R17 connects the first end of the 16th resistance R16, and the of the 17th resistance R17 Two ends are grounded, and 6 feet of the second driving chip U2 pass through the 16th resistance R16 and the 17th resistance R17 partial pressures 3.5V voltages are obtained afterwards, and 4 feet and 8 feet of the second driving chip U2 connect 6 feet of the first driving chip U1 respectively, described The 2 feet ground connection of second driving chip U2, the cathode of the 3 feet connection direct voltage source U5 of the second driving chip U2, described the 1 foot of the 8th short circuit cap J8,2 feet of the 8th short circuit cap J8 are connected after the 7 feet series connection 3rd resistor R3 of two driving chip U2 Ground connection, 5 feet of the second driving chip U2 connect 1 foot of the 4th short circuit cap J4, the 2 feet connection of the first short circuit cap J1 described the 5 feet of two driving chip U2,3 feet of the 9 feet connection double-point double-throw switch SW1 of the second driving chip U2, the double-pole are double 1 foot and 4 feet of throw switch SW1 connect the cathode of the direct voltage source U5 respectively, and 2 feet of the double-point double-throw switch SW1 connect 11 feet of the second driving chip U2 are connect, 5 feet of the double-point double-throw switch SW1 connect the 1 of the second driving chip U2 Foot.
- A kind of 2. 20 grades of level indicating circuits of multiple input sources according to claim 1, it is characterised in that：The first driving chip U1 and the second driving chip U2 choose LED display drivers LM3914.
- A kind of 3. 20 grades of level indicating circuits of multiple input sources according to claim 1, it is characterised in that：The resistance value of the 4th resistance R4 is 10k Ω, and the resistance value of the 5th resistance R5 is 10k Ω.
- A kind of 4. 20 grades of level indicating circuits of multiple input sources according to claim 1, it is characterised in that：The resistance value of the 16th resistance R16 is 1k Ω, and the resistance value of the 17th resistance R17 is 2.5k Ω.
- A kind of 5. 20 grades of level indicating circuits of multiple input sources according to claim 1, it is characterised in that：The touching delay-action switch circuit includes the first triode Q1, the second triode Q2, the 3rd triode Q3, the second direct current Potential source U6, the 3rd direct voltage source U7, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R11, the first capacitance C1, the first diode D1, the base stage of the second adjustable resistance RV2, the first triode Q1 connect the 11st resistance The first end of R11, the collector of the first triode Q1 connect the first end of the 6th resistance R6, and the emitter of the first triode Q1 connects 1 foot of the second adjustable resistance RV2 is connect, the cathode of the second direct voltage source U6 connects the collector of the first triode Q1, and second is straight The anode of galvanic electricity potential source U6 understands the emitter of the first triode Q1, and the base stage of the second triode Q2 connects the first triode Q1's Emitter, the collector of the second triode Q2 connect the first end of the 7th resistance R7, the second end connection the 6th of the 7th resistance R7 The second end of resistance R6, the emitter of the 3rd triode Q2 connect 2 feet of the second adjustable resistance RV2, the second adjustable resistance RV2's 3 feet are grounded, and the cathode of the 3rd direct voltage source U7 connects the collector of the second triode Q2, the anode of the 3rd direct voltage source U7 The emitter of the second triode Q2 is connected, connects the second triode Q2's after the 8th resistance R8 of base series of the 3rd triode Q3 Collector, the emitter of the 3rd triode Q3 connect the first end of the first capacitance C1, the second end connection the 3rd of the first capacitance C1 The cathode of direct voltage source U7, the first end connection of collector connection the first voltage Vo1, the 9th resistance R9 of the 3rd triode Q3 The second end ground connection of first voltage Vo1, the 9th resistance R9, the first end connection first voltage Vo1 of the tenth resistance R10, the tenth electricity The second end for hindering R10 connects the cathode of the first diode D1, the anode ground connection of the first diode D1.
- A kind of 6. 20 grades of level indicating circuits of multiple input sources according to claim 1, it is characterised in that：The self-maintained circuit includes the 4th triode Q4, the 5th triode Q5, the second capacitance C2, the 3rd capacitance C3, the tenth Two resistance R12, the 13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the collector connection of the 4th triode Q4 The second end of 3rd capacitance C3, the emitter ground connection of the 4th triode Q4, the base stage of the 4th triode Q4 connect the second capacitance C2 First end, the collector connection second voltage of the second end connection second voltage Vo2, the 5th triode Q5 of the second capacitance C2 The emitter ground connection of Vo2, the 5th triode Q5, the base stage of the 5th triode Q5 connect the first end of the 3rd capacitance C3, the 3rd electricity The second end for holding C3 connects the first end of the 12nd resistance R12, and the second segment of the 12nd resistance R12 connects the 13rd resistance R13 First end, the second end of the 13rd resistance R13 connects the first end of the 3rd capacitance C3, and the first end of the 14th resistance R14 connects The first end of the 13rd resistance R13 is connect, the second end of the 14th resistance R14 connects the first end of the second capacitance C2, the 15th electricity The first end for hindering R15 connects the first end of the 13rd resistance R14, and the second end of the 15th resistance R15 connects the second capacitance C2's Second end.
- A kind of 7. 20 grades of level indicating circuits of multiple input sources according to claim 1, it is characterised in that：1 foot that the manual voltage regulation circuit includes the first adjustable resistance RV1, the first adjustable resistance RV1 is grounded, and first is adjustable The 2 feet connection tertiary voltage Vo3 of resistance RV1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721307348.0U CN207366621U (en) | 2017-10-11 | 2017-10-11 | A kind of 20 grades of level indicating circuits of multiple input sources |
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| CN201721307348.0U CN207366621U (en) | 2017-10-11 | 2017-10-11 | A kind of 20 grades of level indicating circuits of multiple input sources |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561330A (en) * | 2017-10-11 | 2018-01-09 | 绍兴职业技术学院 | A kind of 20 grades of level indicating circuits of multiple input sources |
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- 2017-10-11 CN CN201721307348.0U patent/CN207366621U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561330A (en) * | 2017-10-11 | 2018-01-09 | 绍兴职业技术学院 | A kind of 20 grades of level indicating circuits of multiple input sources |
| CN107561330B (en) * | 2017-10-11 | 2023-12-08 | 绍兴职业技术学院 | 20-level indicating circuit of multiple input sources |
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Granted publication date: 20180515 Termination date: 20211011 |