CN110896575B - LED three-section voltage display circuit and LED display method - Google Patents
LED three-section voltage display circuit and LED display method Download PDFInfo
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Abstract
The invention belongs to the technical field of automation, and particularly relates to an LED three-section voltage display circuit and an LED display method, wherein the LED three-section voltage display circuit comprises: the second-base square wave generator, the first comparison module, the second comparison module and the gating output display module; the second-base square wave generator is suitable for providing measurement synchronous signals for the first comparison module and the second comparison module and maintaining the time periods of the first comparison module and the second comparison module; the first comparison module and the second comparison module are suitable for generating corresponding signals according to the measured voltage and sending the signals to the gating output display module; the gating output display module is suitable for controlling the LEDs to display corresponding colors according to corresponding signals, so that the quantity of the LEDs to be displayed is reduced, the area of a panel required to be displayed is reduced, and the display is concise, stable and does not flicker.
Description
Technical Field
The invention belongs to the technical field of automation, and particularly relates to an LED three-section voltage display circuit and an LED display method.
Background
The display circuit that is often needed is to display the continuous three-segment voltage state with the LED, because the reason such as the control is comparatively troublesome, generally adopt 3 LEDs to show, and use single 3-color LED to show and usually have some problems, for example, when near voltage threshold, show unstability, frequent scintillation etc..
Therefore, in view of the above technical problems, it is necessary to design a new LED three-stage voltage display circuit and LED display method.
Disclosure of Invention
The invention aims to provide an LED three-section voltage display circuit and an LED display method.
In order to solve the above technical problem, the present invention provides an LED three-stage voltage display circuit, including:
the second-base square wave generator, the first comparison module, the second comparison module and the gating output display module;
the second-base square wave generator is suitable for providing measurement synchronous signals for the first comparison module and the second comparison module and maintaining the time periods of the first comparison module and the second comparison module;
the first comparison module and the second comparison module are suitable for generating corresponding signals according to the measured voltage and sending the signals to the gating output display module;
the gating output display module is suitable for controlling the LEDs to display corresponding colors according to corresponding signals.
Further, the second-base square wave generator includes: the first time base IC chip, a resistor R1, a resistor R2 and an electrolytic capacitor C1;
the resistor R1 and the resistor R2 are connected in series and connected with corresponding input ends of the first time-base IC chip;
the electrolytic capacitor C1 is connected with the corresponding input end of the first time base IC chip;
the output end of the first time-base IC chip is respectively connected with the trigger ends of the first comparison module and the second comparison module;
the resistor R1, the resistor R2 and the electrolytic capacitor C1 are adapted to adjust the time period of the second-square wave generator.
Further, the first comparing module comprises: the second time base IC chip, the slide rheostat R3, the resistor R4 and the voltage stabilizing diode DW 1;
the slide rheostat R3 and the resistor R4 are suitable for dividing the voltage to be measured and inputting the voltage to the corresponding input end of the second time-base IC chip;
the voltage stabilizing diode DW1 is suitable for protecting the second time base IC chip;
the second time-base IC chip is suitable for generating corresponding signals according to the voltage obtained by the resistor R4 after voltage division and sending the signals to corresponding input ends of the gating output display module through the output ends, namely
When the second time-base IC chip obtains the voltage from the resistor R4, such as exceeding the first preset voltage, the output end of the second time-base IC chip outputs low level, otherwise, outputs high level, and maintains the next period.
Further, the second comparing module comprises: a third time base IC chip, a slide rheostat R5, a resistor R6 and a voltage stabilizing diode DW 2;
the slide rheostat R5 and the resistor R6 are suitable for dividing the voltage to be measured and inputting the voltage to the corresponding input end of the third time-base IC chip;
the voltage stabilizing diode DW2 is suitable for protecting a third time-base IC chip;
the third time-base IC chip is suitable for generating corresponding signals according to the voltage obtained by the resistor R6 after voltage division and sending the signals to corresponding input ends of the gating output display module through the output ends, namely
When the third time-base IC chip obtains the voltage from the resistor R6, such as exceeding the second preset voltage, the output end of the third time-base IC chip outputs low level, otherwise, outputs high level, and maintains the next period.
Further, when the measured voltage is less than a third preset voltage, the first comparison module outputs a high level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display red;
when the measured voltage is greater than the fourth preset voltage, the first comparison module outputs a low level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display orange; and
when the measured voltage is greater than the third preset voltage and less than the fourth preset voltage, the first comparison module outputs a low level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display green.
Further, the LED three-section voltage display circuit further comprises: a power supply module;
the power supply module is suitable for supplying power supply voltage to the second-base square-wave generator, the first comparison module, the second comparison module and the gating output display module.
In another aspect, the present invention further provides an LED display method, including:
providing measurement synchronization signals to the first comparison module and the second comparison module through the second-base square-wave generator, and keeping the time periods of the first comparison module and the second comparison module;
generating corresponding signals according to the measured voltage through a first comparison module and a second comparison module and sending the signals to the gating output display module; and
and controlling the LEDs to display corresponding colors according to the corresponding signals through the gating output display module.
Further, the LED display method is suitable for being realized by adopting the LED three-section voltage display circuit.
The invention has the advantages that the invention adopts a second square wave generator, a first comparison module, a second comparison module and a gating output display module; the second-base square wave generator is suitable for providing measurement synchronous signals for the first comparison module and the second comparison module and maintaining the time periods of the first comparison module and the second comparison module; the first comparison module and the second comparison module are suitable for generating corresponding signals according to the measured voltage and sending the signals to the gating output display module; the gating output display module is suitable for controlling the LEDs to display corresponding colors according to corresponding signals, so that the quantity of the LEDs to be displayed is reduced, the area of a panel required to be displayed is reduced, and the display is concise, stable and does not flicker.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic block diagram of an LED three-segment voltage display circuit in accordance with the present invention;
fig. 2 is a circuit diagram of a three-stage voltage display of an LED according to the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Fig. 1 is a schematic block diagram of an LED three-stage voltage display circuit according to the present invention.
As shown in fig. 1, this embodiment 1 provides an LED three-segment voltage display circuit, which includes: a second-base square wave generator, a first comparison module, a second comparison module and a gating output display module (IC 4); the gated output display module may be, but is not limited to, CD4051, which is taken as CD4051 in this embodiment for description; the second-base square wave generator is suitable for providing measurement synchronous signals for the first comparison module and the second comparison module and keeping the time periods of the first comparison module and the second comparison module (the periods of the first comparison module and the second comparison module comparing the measured voltage); the first comparison module and the second comparison module are suitable for generating corresponding signals according to the measured voltage and sending the signals to the gating output display module; the gating output display module is suitable for controlling LEDs (single 3-color LEDs) to display corresponding colors according to corresponding signals, so that the quantity of the LEDs to be displayed is reduced, the area of a panel required by display is reduced, and the display is concise, stable and flicker-free; and the LED three-section voltage display circuit is relatively simple and independent and is easy to transplant, and because the LED three-section voltage display circuit is a universal element, the whole LED three-section voltage display circuit is quite low in price and convenient to widely apply.
Fig. 2 is a circuit diagram of a three-stage voltage display of an LED according to the present invention.
As shown in fig. 2, in the present embodiment, the second-square wave generator includes: a first time base IC chip (IC1), a resistor R1 (a resistor with a resistance of 20K omega can be adopted but is not limited to), a resistor R2 (a resistor with a resistance of 62K omega can be adopted but is not limited to), and an electrolytic capacitor C1 (a 10uF electrolytic capacitor can be adopted but is not limited to); the first time-based IC chip may be, but is not limited to, NE555, which is taken as an example for description; the resistor R1 and the resistor R2 are connected in series and connected with corresponding input ends of the first time-base IC chip, namely the resistor R1 and the resistor R2 are connected in series and then connected with the anode of a power supply module through R1, one end of the resistor R2 is connected with a No. 6 pin of the IC1, and the other end of the resistor R2 is connected with a No. 7 pin of the IC 1; the electrolytic capacitor C1 is connected with the corresponding input end of the first time-based IC chip, namely one end of the measured voltage is connected with the negative electrode of the electrolytic capacitor C1 and then is connected with No. 2 and No. 6 pins of the first time-based IC chip; the output end (No. 3 pin of IC1, square wave output end) of the first time base IC chip is respectively connected with the trigger ends of the first comparison module and the second comparison module; pins 4 and 8 of the IC1 are connected with the anode of the power module, one end of the voltage to be measured is connected with the pin 1 of the IC1, and one end of the voltage to be measured is connected with the pin 5 of the IC1 through a capacitor C2; the resistor R1, the resistor R2 and the electrolytic capacitor C1 are suitable for adjusting the time period of the second-base square wave generator, namely the square wave period is 0.7 (R1+2R2) C1, the time period of the square wave is about 1 second, and when the time period is changed, the time period can be changed by changing C1 or R1 and R2; the period of comparing the measured voltage by the first comparing module and the second comparing module can be changed by changing the time period of the second-base square wave generator.
In this embodiment, the first comparing module includes: a second time base IC chip (IC2), a sliding rheostat R3 (which can be but is not limited to a sliding rheostat with a resistance value of 20K omega), a resistor R4 (which can be but is not limited to a resistor with a resistance value of 4K omega) and a voltage stabilizing diode DW 1; the second time-base IC chip can be, but is not limited to, NE555, which is taken as an example for description; triggering when pin 2 of IC2 receives a low level output from pin 3 of IC 1; the slide rheostat R3 and the resistor R4 are suitable for dividing the voltage to be measured and inputting the voltage to the corresponding input end of the second time-base IC chip, namely, one end of the voltage to be measured is connected with the resistor R4 and the slide rheostat R3 which are connected in series and then connected with the other end of the voltage to be measured, and the connecting end of the resistor R4 and the slide rheostat R3 is connected with the No. 6 pin of the IC 2; the voltage stabilizing diode DW1 is suitable for protecting a second time-base IC chip, namely, one end of the voltage to be measured is connected with the positive electrode of the voltage stabilizing diode DW1 and then connected with the No. 6 pin of the IC2, and the No. 6 pin of the IC2 is clamped below the power supply voltage Vcc by the voltage stabilizing diode DW1 so as to protect the IC 2; pins 4 and 8 of the IC2 are connected with the anode of the power module, one end of the voltage to be measured is connected with the pin 1 of the IC2, and one end of the voltage to be measured is connected with the pin 5 of the IC2 through a capacitor C3; the second time-base IC chip is suitable for generating a corresponding signal according to the voltage obtained by the resistor R4 after voltage division and sending the signal to a corresponding input end of the gated output display module through an output end, namely when the second time-base IC chip obtains the voltage from the resistor R4 and exceeds a first preset voltage (when the No. 6 pin of the IC2 obtains the voltage from the resistor R4 and exceeds a 2/3 power supply voltage Vcc), the output end (No. 3 pin) of the second time-base IC chip outputs a low level, otherwise, the output end outputs a high level and maintains the low level for the next period; pin 3 of IC2 is connected to pin 10 of IC4, while pin 3 of IC2 is connected to the positive terminal of the power module via a resistor R7 (which may be, but is not limited to, a resistor with a resistance of 10K Ω).
In this embodiment, the second comparing module includes: a third time base IC chip (IC3), a sliding rheostat R5 (which can be but is not limited to a sliding rheostat with a resistance value of 20K omega), a resistor R6 (which can be but is not limited to a resistor with a resistance value of 4K omega) and a voltage stabilizing diode DW 2; triggering when pin 2 of IC3 receives a low level output from pin 3 of IC 1; the slide rheostat R5 and the resistor R6 are suitable for dividing the voltage to be measured and inputting the voltage to the corresponding input end of the third time-base IC chip, namely, one end of the voltage to be measured is connected with the resistor R6 and the slide rheostat R5 which are connected in series and then connected with the other end of the voltage to be measured, and the connecting end of the resistor R6 and the slide rheostat R5 is connected with the No. 6 pin of the IC 3; the voltage stabilizing diode DW2 is suitable for protecting a third time-base IC chip, namely, one end of the voltage to be measured is connected with the positive electrode of the voltage stabilizing diode DW2 and then connected with the No. 6 pin of the IC3, and the No. 6 pin of the IC3 is clamped below the power supply voltage Vcc by the voltage stabilizing diode DW2 so as to protect the IC 3; pins 4 and 8 of the IC3 are connected with the anode of the power module, one end of the voltage to be measured is connected with the pin 1 of the IC3, and one end of the voltage to be measured is connected with the pin 5 of the IC3 through a capacitor C4; the third time-base IC chip is suitable for generating a corresponding signal according to the voltage obtained by the resistor R6 after voltage division and sending the signal to a corresponding input end of the gated output display module through an output end, namely when the third time-base IC chip obtains the voltage from the resistor R6 and exceeds a second preset voltage (when the No. 6 pin of the IC3 obtains the voltage from the resistor R6 and exceeds a 2/3 power supply voltage Vcc), the output end (No. 3 pin) of the third time-base IC chip outputs a low level, otherwise, the output end outputs a high level and maintains the low level for the next period; pin 3 of IC3 is connected to pin 9 of IC4, while pin 3 of IC3 is connected to the positive terminal of the power module via a resistor R8 (which may be, but is not limited to, a resistor with a resistance of 10K Ω).
In this embodiment, pins 3 and 16 of IC4 are connected to the positive electrode of the power module, one end of a voltage to be measured is connected to pins 11, 6 and 8 of IC4, and pin 8 is grounded, pin 1 of IC4 is connected to the first input terminal of the LED through a current-limiting resistor R10 (which may be but is not limited to a resistor having a resistance of 200 Ω), pin 2 of IC4 is connected to the second input terminal of the LED through a current-limiting resistor R9 (which may be but is not limited to a resistor having a resistance of 200 Ω), the third input terminal of the LED is connected to one end of the voltage to be measured, pin 13 of IC4 is connected to the connection terminal of current-limiting resistor R9 and the LED through a diode D1, and pin 13 of IC4 is connected to the connection terminal of current-limiting resistor R10 and the LED through a diode D2; the control end of the IC4 is sequentially provided with a No. 11 pin, a No. 10 pin and a No. 9 pin from low position to high position; when the measured voltage is less than a third preset voltage (which can be less than 17V), the first comparison module outputs a high level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display red (the gating control signal is '110' and corresponds to the soft switch closure of the No. 3 pin and the No. 2 pin, and the LED lights a red lamp); when the measured voltage is greater than a fourth preset voltage (which may be greater than 21V), the first comparison module outputs a low level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display orange (the gating control signal is '000' and corresponds to the soft switch closure of the pin 3 and the pin 13, and the LED lights the orange lamp); when the measured voltage is greater than a third preset voltage and less than a fourth preset voltage (which can be between 17V and 21V), the first comparison module outputs a low level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display green (a gating control signal is '100' and corresponds to the soft switch closure of the No. 3 pin and the No. 1 pin, and the LED lights a green lamp); diode D1 and diode D2 are intended to cut off communication when the red or green light is lit alone.
In this embodiment, the LED three-segment voltage display circuit further includes: a power supply module; the power supply module is suitable for supplying power supply voltage Vcc to the second-base square-wave generator, the first comparison module, the second comparison module and the gating output display module; the power supply voltage can be 6V, the threshold voltage of No. 6 pins of the IC2 and the IC3 can be an integer of 4V, and the resistor R4 (matched resistor) and the resistor R6 (matched resistor) are 4 Komega, so that calculation and selection are facilitated; the internal resistance of the soft switch when the No. 3 pin and the No. 13 pin of the IC4 are gated can be just the current-limiting resistance required by the LED, and simultaneously, the diode D1 and the diode D2 are required to select a germanium tube with the conduction voltage drop of 0.3V; for these reasons, if the power supply voltage is selected to be greater than 6V, it is necessary to change not only the sampling voltage-dividing resistance ratio but also the value of the current-limiting resistance of the LED.
Example 2
On the basis of embodiment 1, this embodiment 2 further provides an LED display method, including: providing measurement synchronization signals to the first comparison module and the second comparison module through the second-base square-wave generator, and keeping the time periods of the first comparison module and the second comparison module; generating corresponding signals according to the measured voltage through a first comparison module and a second comparison module and sending the signals to the gating output display module; and controlling the LEDs to display corresponding colors according to the corresponding signals through the gating output display module.
In this embodiment, the LED display method is suitable for being implemented by the LED three-stage voltage display circuit described in embodiment 1.
In summary, the invention uses the second-base square wave generator, the first comparing module, the second comparing module and the gating output display module; the second-base square wave generator is suitable for providing measurement synchronous signals for the first comparison module and the second comparison module and maintaining the time periods of the first comparison module and the second comparison module; the first comparison module and the second comparison module are suitable for generating corresponding signals according to the measured voltage and sending the signals to the gating output display module; the gating output display module is suitable for controlling the LEDs to display corresponding colors according to corresponding signals, so that the quantity of the LEDs to be displayed is reduced, the area of a panel required to be displayed is reduced, and the display is concise, stable and does not flicker.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. An LED three-segment voltage display circuit, comprising:
the second-base square wave generator, the first comparison module, the second comparison module and the gating output display module;
the second-base square wave generator is suitable for providing measurement synchronous signals for the first comparison module and the second comparison module and maintaining the time periods of the first comparison module and the second comparison module;
the first comparison module and the second comparison module are suitable for generating corresponding signals according to the measured voltage and sending the signals to the gating output display module;
the gating output display module is suitable for controlling the LEDs to display corresponding colors according to corresponding signals;
the second-base square wave generator includes: the first time base IC chip, a resistor R1, a resistor R2 and an electrolytic capacitor C1;
the resistor R1 and the resistor R2 are connected in series and connected with corresponding input ends of the first time-base IC chip;
the electrolytic capacitor C1 is connected with the corresponding input end of the first time base IC chip;
the output end of the first time-base IC chip is respectively connected with the trigger ends of the first comparison module and the second comparison module;
the resistor R1, the resistor R2 and the electrolytic capacitor C1 are adapted to adjust the time period of the second-square wave generator.
2. An LED three-segment voltage display circuit according to claim 1,
the first comparison module comprises: the second time base IC chip, the slide rheostat R3, the resistor R4 and the voltage stabilizing diode DW 1;
the slide rheostat R3 and the resistor R4 are suitable for dividing the voltage to be measured and inputting the voltage to the corresponding input end of the second time-base IC chip;
the voltage stabilizing diode DW1 is suitable for protecting the second time base IC chip;
the second time-base IC chip is suitable for generating corresponding signals according to the voltage obtained by the resistor R4 after voltage division and sending the signals to corresponding input ends of the gating output display module through the output ends, namely
When the second time-base IC chip obtains the voltage from the resistor R4, such as exceeding the first preset voltage, the output end of the second time-base IC chip outputs low level, otherwise, outputs high level, and maintains the next period.
3. An LED three-segment voltage display circuit according to claim 2,
the second comparison module comprises: a third time base IC chip, a slide rheostat R5, a resistor R6 and a voltage stabilizing diode DW 2;
the slide rheostat R5 and the resistor R6 are suitable for dividing the voltage to be measured and inputting the voltage to the corresponding input end of the third time-base IC chip;
the voltage stabilizing diode DW2 is suitable for protecting a third time-base IC chip;
the third time-base IC chip is suitable for generating corresponding signals according to the voltage obtained by the resistor R6 after voltage division and sending the signals to corresponding input ends of the gating output display module through the output ends, namely
When the third time-base IC chip obtains the voltage from the resistor R6, such as exceeding the second preset voltage, the output end of the third time-base IC chip outputs low level, otherwise, outputs high level, and maintains the next period.
4. An LED three-segment voltage display circuit according to claim 3,
when the measured voltage is lower than a third preset voltage, the first comparison module outputs a high level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display red;
when the measured voltage is greater than the fourth preset voltage, the first comparison module outputs a low level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display orange; and
when the measured voltage is greater than the third preset voltage and less than the fourth preset voltage, the first comparison module outputs a low level, the second comparison module outputs a high level, and the gating output display module is suitable for controlling the LED to display green.
5. An LED three-segment voltage display circuit according to claim 1,
the LED three-section voltage display circuit further comprises: a power supply module;
the power supply module is suitable for supplying power supply voltage to the second-base square-wave generator, the first comparison module, the second comparison module and the gating output display module.
6. An LED display method, comprising:
providing measurement synchronization signals to the first comparison module and the second comparison module through the second-base square-wave generator, and keeping the time periods of the first comparison module and the second comparison module;
generating corresponding signals according to the measured voltage through a first comparison module and a second comparison module and sending the signals to the gating output display module; and
controlling the LEDs to display corresponding colors according to corresponding signals through the gating output display module;
the LED display method is suitable for being realized by adopting the LED three-section voltage display circuit as claimed in any one of claims 1 to 5.
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