CN220289726U - Current alarm detection plate - Google Patents
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- CN220289726U CN220289726U CN202320676789.7U CN202320676789U CN220289726U CN 220289726 U CN220289726 U CN 220289726U CN 202320676789 U CN202320676789 U CN 202320676789U CN 220289726 U CN220289726 U CN 220289726U
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 239000003990 capacitor Substances 0.000 claims description 102
- 230000009977 dual effect Effects 0.000 claims description 11
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- 238000013461 design Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
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- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The utility model discloses a current alarm detection board, which comprises a power supply circuit, a double operational amplifier chip circuit, a monochromatic display module circuit, a buzzer amplifying circuit and a singlechip chip circuit, wherein the power supply circuit is connected with the double operational amplifier chip circuit; the singlechip chip circuit is respectively connected with the power supply circuit, the double operational amplifier chip circuit, the monochromatic display module circuit and the buzzer amplifying circuit, and the power supply circuit is connected with the double operational amplifier chip circuit. The utility model designs the TFT detection current alarm detection plate, when the current exceeds the set range, the current alarm detection plate alarms, the ADC detection comparator in the double operational amplifiers outputs signals to the singlechip through the singlechip chip and the double operational amplifiers, the singlechip chip judges that the current exceeds the set range, the singlechip chip outputs signals, the buzzer sounds, and the monochrome display module displays the actual current, so that the current alarm effect is achieved.
Description
Technical Field
The utility model relates to the technical field of current detection, in particular to a current alarm detection plate.
Background
In the production line of the existing factory, each assembly test platform is just like a single independent cell, so that each test work task is completed. QC data of a module production line can be divided into quantitative data and qualitative data: quantitative data can be obtained by using a digital instrument from the production process, and automatic data acquisition can be completed; qualitative data, such as cold solder joints, bumps, etc., of the PCB (Printed Circuit Board, printed wiring board), i.e. product defect data. Among these, QC is quality control, which is a coordinated activity of the command and control organization in terms of quality, and quality control definition, which is part of quality management, is aimed at meeting quality requirements.
In the existing electronic equipment production and processing enterprises or factories, a plurality of QC detection lines are arranged, a plurality of strict quality detection is carried out on electronic devices and digital products, wherein the defects that whether the circuits in the products are normal or whether short circuits, open circuits and the like exist or not are determined by carrying out current detection on the electronic devices and the digital products, so that the safety and the reliability of the circuits of the products are ensured, the quality of the products is ensured, and the qualification rate of the products is improved.
At present, most module production lines's QC detects post, detects the ampere meter that the electric current scheme all used pointer or digital display detects, and not only complex operation, and whether the product has unusual needs the manual work to observe and judge, leads to detection efficiency low, and is difficult to guarantee the accuracy.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the problems in the related art, the utility model provides a current alarm detection plate to overcome the technical problems in the prior art.
For this purpose, the utility model adopts the following specific technical scheme:
a current alarm detection board comprises a power supply circuit, a double operational amplifier chip circuit, a monochromatic display module circuit, a buzzer amplifying circuit and a singlechip chip circuit;
the singlechip chip circuit is respectively connected with the power supply circuit, the double operational amplifier chip circuit, the monochromatic display module circuit and the buzzer amplifying circuit, and the power supply circuit is connected with the double operational amplifier chip circuit.
Further, the power supply circuit comprises a chip U1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a switch S1, a resistor R2, a power supply BT1 and a zener diode U2;
one end of the capacitor C1, one end of the capacitor C2 and the Vout pin of the chip U1 are kept connected and are connected with an input end VCC, the Vin pin of the chip U1 is kept connected with one end of the capacitor C5, one end of the capacitor C6 and one end of the switch S1 respectively, the other end of the switch S1 is kept connected with the positive electrode of the power supply BT1, and the negative electrode of the power supply BT1, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C1, the other end of the capacitor C2 and the GND pin of the chip U1 are kept connected and grounded;
one end of a capacitor C3 is connected with one end of a resistor R2 and is connected with an input end VCC, the other end of the resistor R2 is respectively connected with the cathode of a voltage stabilizing diode U2, one end of a capacitor C4 and one end of a capacitor C7 and is used for inputting AVref signals, and the other end of the capacitor C3, the anode of the voltage stabilizing diode U2, the other end of the capacitor C4 and the other end of the capacitor C7 are connected and grounded.
Further, the dual op-amp chip circuit includes a connector JP1, a connector JP2, a switch S2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, an op-amp U3A and an op-amp U3B;
wherein, the 1 st pin and the 2 nd pin of the connector JP1 are both kept connected with the 2 nd pin of the switch S2, the 3 rd pin of the switch S2 is respectively kept connected with one end of a resistor R6 and one end of a resistor R7, the other end of the resistor R6 is respectively kept connected with one end of a resistor R9, the 1 st pin of the connector JP2, the 2 nd pin, one end of a resistor R12 and one end of a resistor R15, the 1 st pin of the switch S2 is respectively kept connected with the other end of a resistor R12 and one end of a resistor R13, the other end of the resistor R7 is respectively kept connected with the non-inverting input end of an operational amplifier U3A and one end of a resistor R11, the other end of the resistor R9 is respectively kept connected with the inverting input end of the operational amplifier U3A, one end of a resistor R10 and one end of a capacitor C9, the output end of the operational amplifier U3A is kept connected with the other end of the resistor R10, the other end of the capacitor C9 and one end of the resistor R8, the positive power end of the operational amplifier U3A is connected with the input end VCC, the negative power end of the operational amplifier U3A is grounded, the other end of the resistor R8 is connected with one end of the capacitor C8 and inputs uA signals, the other end of the capacitor C8 is grounded, the other end of the resistor R13 is kept connected with one end of the resistor R16 and the non-inverting input end of the operational amplifier U3B, the other end of the resistor R15 is kept connected with the inverting input end of the operational amplifier U3B, one end of the resistor R17 and one end of the capacitor C11, the output end of the operational amplifier U3B is kept connected with the other end of the resistor R17, the other end of the capacitor C11 and one end of the resistor R14, the other end of the resistor R14 is kept connected with one end of the capacitor C10 and inputs mA signals, and the other end of the capacitor C10 is grounded.
Further, the monochromatic display module circuit comprises a display screen LCD, a resistor R1, a resistor R3 and a resistor R4;
the 1 st pin of the display screen LCD is grounded, the 3 rd pin of the display screen LCD is respectively connected with one end of a resistor R1 and one end of a resistor R4, the other end of the resistor R1 is connected with an input end VCC, the other end of the resistor R4 is grounded, the 16 th pin of the display screen LCD is connected with one end of a resistor R3, the other end of the resistor R3 is grounded, and the 2 nd pin and the 15 th pin of the display screen LCD are connected with the input end VCC.
Further, the buzzer amplifying circuit comprises a resistor R5, a buzzer Beep1 and a triode Q1;
wherein, input VCC is connected to buzzer Beep1 one end, and triode Q1 collecting electrode keeps connecting is connected to buzzer Beep1 other end, and triode Q1 projecting pole ground connection, triode Q1 base and resistance R5 one end are connected, and input signal BEEP is connected to the resistance R5 other end.
Further, the singlechip chip circuit comprises a singlechip chip U4;
the 3 rd pin output AVref signal of the single chip microcomputer chip U4 is kept connected with a power supply circuit, the 4 th pin output uA signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R8 and one end of the capacitor C8, the 4 th pin output mA signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R14 and one end of the capacitor C10, and the 6 th pin output BEEP signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R5;
the single chip microcomputer chip U4 is characterized in that a 23 rd pin, a 24 th pin, a 25 th pin, a 26 th pin, a 27 th pin, a 28 th pin, a 1 st pin and a 2 nd pin are sequentially connected with a 7 th pin, an 8 th pin, a 9 th pin, a 10 th pin, an 11 th pin, a 12 th pin, a 13 th pin and a 14 th pin of the display screen LCD, an 18 th pin of the single chip microcomputer chip U4 is connected with a 5 th pin of the display screen LCD and inputs RW signals, and a 17 th pin of the single chip microcomputer chip U4 is connected with a 4 th pin of the display screen LCD and inputs RS signals.
The beneficial effects of the utility model are as follows: through design TFT detection current alarm pick-up plate, after the electric current surpasses the settlement scope, electric current alarm pick-up plate and report to the police, through singlechip chip and dual operational amplifier, will detect the comparator through the inside ADC of dual operational amplifier, output signal arrives the singlechip, judge through the singlechip chip, after the electric current surpasses the settlement scope, singlechip chip output signal, buzzer sound, monochromatic display module shows actual electric current simultaneously, reach the electric current alarm effect, when having improved production operator's efficiency, for the product shipment quality provides reliable guarantee.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a functional block diagram of a current alarm sensing board according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of a power supply circuit in a current alarm sensing board according to an embodiment of the present utility model;
FIG. 3 is a schematic circuit diagram of a dual op amp chip circuit in a current alarm sense plate according to an embodiment of the present utility model;
FIG. 4 is a schematic circuit diagram of a monochrome display module circuit in a current alarm detection plate according to an embodiment of the present utility model;
FIG. 5 is a schematic circuit diagram of a buzzer amplification circuit in a current alarm sensing board according to an embodiment of the present utility model;
fig. 6 is a schematic circuit diagram of a single chip microcomputer chip circuit in a current alarm detection board according to an embodiment of the utility model.
In the figure:
1. a power supply circuit; 2. a dual op amp chip circuit; 3. a monochrome display module circuit; 4. a buzzer amplifying circuit; 5. a monolithic chip circuit.
Detailed Description
For the purpose of further illustrating the various embodiments, the present utility model provides the accompanying drawings, which are a part of the disclosure of the present utility model, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present utility model, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.
According to an embodiment of the present utility model, there is provided a current alarm detection board.
The utility model will be further described with reference to the accompanying drawings and the specific embodiments, as shown in fig. 1 to 6, a current alarm detection board according to an embodiment of the utility model includes a power supply circuit 1, a dual operational amplifier chip circuit 2, a monochrome display module circuit 3, a buzzer amplifying circuit 4 and a singlechip chip circuit 5;
the monolithic chip circuit 5 is respectively connected with the power supply circuit 1, the dual operational amplifier chip circuit 2, the monochrome display module circuit 3 and the buzzer amplifying circuit 4, and the power supply circuit 1 is connected with the dual operational amplifier chip circuit 2.
In one embodiment, as shown in fig. 2, the power supply circuit 1 includes a chip U1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a switch S1, a resistor R2, a power supply BT1, and a zener diode U2;
one end of the capacitor C1, one end of the capacitor C2 and the Vout pin of the chip U1 are kept connected and are connected with an input VCC, the Vin pin of the chip U1 is kept connected with one end of the capacitor C5, one end of the capacitor C6 and one end of the switch S1, the other end of the switch S1 is kept connected with the positive electrode of the power BT1, and the negative electrode of the power BT1, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C1, the other end of the capacitor C2 and the GND pin of the chip U1 are kept connected and grounded;
one end of the capacitor C3 is connected with one end of the resistor R2 and is connected with the input end VCC, the other end of the resistor R2 is respectively connected with the cathode of the voltage stabilizing diode U2, one end of the capacitor C4 and one end of the capacitor C7 and is used for inputting AVref signals, and the other end of the capacitor C3, the anode of the voltage stabilizing diode U2, the other end of the capacitor C4 and the other end of the capacitor C7 are connected and grounded.
The power supply circuit 1 is used for supplying DC9V power and converting 3.3V power to other unit circuits.
In one embodiment, as shown in fig. 3, the dual operational amplifier chip circuit 2 includes a connector JP1, a connector JP2, a switch S2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, an operational amplifier U3A, and an operational amplifier U3B;
wherein the 1 st pin and the 2 nd pin of the connector JP1 are both kept connected with the 2 nd pin of the switch S2, the 3 rd pin of the switch S2 is kept connected with one end of the resistor R6 and one end of the resistor R7 respectively, the other end of the resistor R6 is kept connected with one end of the resistor R9, the 1 st pin of the connector JP2, the 2 nd pin, one end of the resistor R12 and one end of the resistor R15 respectively, the 1 st pin of the switch S2 is kept connected with the other end of the resistor R12 and one end of the resistor R13 respectively, the other end of the resistor R7 is kept connected with the non-inverting input end of the operational amplifier U3A and one end of the resistor R11 respectively, the other end of the resistor R9 is kept connected with the inverting input end of the operational amplifier U3A, one end of the resistor R10 and one end of the capacitor C9 respectively, the output end of the operational amplifier U3A is connected with the other end of the resistor R10, the other end of the capacitor C9 and one end of the resistor R8, the positive power end of the operational amplifier U3A is connected with the input end VCC, the negative power end of the operational amplifier U3A is grounded, the other end of the resistor R8 is connected with one end of the capacitor C8 and inputs uA signals, the other end of the capacitor C8 is grounded, the other end of the resistor R13 is connected with one end of the resistor R16 and the non-inverting input end of the operational amplifier U3B, the other end of the resistor R15 is connected with the inverting input end of the operational amplifier U3B, one end of the resistor R17 and one end of the capacitor C11 respectively, the output end of the operational amplifier U3B is connected with the other end of the resistor R17, the other end of the capacitor C11 and one end of the resistor R14 respectively, the other end of the resistor R14 is connected with one end of the capacitor C10 and inputs mA signals, the other end of the capacitor C10 is grounded.
The dual operational amplifier chip circuit 2 is used for detecting current, operating and comparing with the single chip microcomputer chip.
In one embodiment, as shown in fig. 4, the monochrome display module circuit 3 includes a display LCD, a resistor R1, a resistor R3, and a resistor R4;
the 1 st pin of the display screen LCD is grounded, the 3 rd pin of the display screen LCD is respectively connected with one end of the resistor R1 and one end of the resistor R4, the other end of the resistor R1 is connected with the input end VCC, the other end of the resistor R4 is grounded, the 16 th pin of the display screen LCD is connected with one end of the resistor R3, the other end of the resistor R3 is grounded, and the 2 nd pin and the 15 th pin of the display screen LCD are both connected with the input end VCC.
The monochromatic display module circuit 3 displays the current and is electrically connected with the singlechip chip.
In one embodiment, as shown in fig. 5, the buzzer amplifying circuit 4 includes a resistor R5, a buzzer Beep1, and a triode Q1;
the input end VCC is connected to buzzer Beep1 one end, triode Q1 collecting electrode keeps being connected is connected to buzzer Beep1 other end, triode Q1 projecting pole ground connection, triode Q1 base with resistance R5 one end is connected, input signal BEEP is connected to the resistance R5 other end.
The buzzer amplifying circuit 4 receives the signal and sounds the buzzer.
In one embodiment, as shown in fig. 6, the monolithic chip circuit 5 includes a monolithic chip U4;
the 3 rd pin output AVref signal of the single chip microcomputer chip U4 is kept connected with the power supply circuit 1, the 4 th pin output uA signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R8 and one end of the capacitor C8, the 4 th pin output mA signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R14 and one end of the capacitor C10, and the 6 th pin output BEEP signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R5;
the LED display screen comprises a display screen LCD, a single chip microcomputer chip U4, a display screen LCD, a display screen LED, a control circuit and a control circuit, wherein the single chip microcomputer chip U4 is characterized in that a 23 rd pin, a 24 th pin, a 25 th pin, a 26 th pin, a 27 th pin, a 28 th pin, a 1 st pin and a 2 nd pin are sequentially connected with a 7 th pin, an 8 th pin, a 9 th pin, a 10 th pin, an 11 th pin, a 12 th pin, a 13 th pin and a 14 th pin of the display screen LCD, an 18 th pin of the single chip microcomputer chip U4 is connected with a 5 th pin of the display screen LCD and inputs RW signals, and a 17 th pin of the single chip microcomputer chip U4 is connected with a 4 th pin of the display screen LCD and inputs RS signals.
The monolithic chip circuit 2 functions to provide a measured microampere or milliamp current, which is converted internally to output a signal to the monochrome display module circuit 3.
In order to facilitate understanding of the above technical solutions of the present utility model, the following describes in detail the working principle or operation manner of the present utility model in the actual process.
When the utility model is practically applied, the utility model is used for alarming by the current alarming detection plate after the current exceeds the set range, and comprises the power supply conversion IC-9V output 3.3V-VCC; the double operational amplifier outputs a signal after performing double operational comparators on the JP1 and JP2 detection current; the signal received by the singlechip chip P1.1 and the signal received by the singlechip chip P1.2 are output into signals D0-D7 through the singlechip chip; the single-color display module receives the signals D0-D7 output by the singlechip chip and displays the signals on the display module; and when the single-chip microcomputer detects that the current is larger than the set value, the BEEP receives the signal and amplifies the sound of the buzzer.
The working principle is as follows: the direct current power supply DC9V is input, 9V is converted into 3.3V by the LM1117-33DC-DC conversion IC, and 3.3V is supplied to the double operational amplifier, the singlechip chip, the monochromatic display module and the buzzer amplifying circuit; the ADC detection circuit of the double operational amplifiers detects signals and inputs the signals to the singlechip chip; the singlechip chip judges according to the input signal, and outputs a high-level signal to the buzzer and simultaneously outputs a signal to the monochrome display module when the current exceeds the set current range; the single-color display module displays actual current according to the chip signal of the single chip; the buzzer amplifying circuit amplifies the high-level signal output by the singlechip through the triode, and the buzzer sounds.
In summary, by means of the technical scheme, the current alarm detection plate is designed to detect the current, when the current exceeds the set range, the current alarm detection plate alarms, the single chip microcomputer chip and the double operational amplifier are used for outputting signals to the single chip microcomputer through the ADC detection comparator in the double operational amplifier, the single chip microcomputer chip judges that the current exceeds the set range, the single chip microcomputer chip outputs signals, the buzzer sounds, and meanwhile, the monochrome display module displays the actual current, so that the current alarm effect is achieved, the efficiency of production operators is improved, and meanwhile, reliable guarantee is provided for the product shipment quality.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (6)
1. The current alarm detection board is characterized by comprising a power supply circuit (1), a double operational amplifier chip circuit (2), a monochromatic display module circuit (3), a buzzer amplifying circuit (4) and a single chip circuit (5);
the single chip microcomputer chip circuit (5) is respectively connected with the power supply circuit (1), the double operational amplifier chip circuit (2), the single-color display module circuit (3) and the buzzer amplifying circuit (4), and the power supply circuit (1) is connected with the double operational amplifier chip circuit (2).
2. The current alarm detection board according to claim 1, wherein the power supply circuit (1) includes a chip U1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a switch S1, a resistor R2, a power supply BT1, and a zener diode U2;
one end of the capacitor C1, one end of the capacitor C2 and the Vout pin of the chip U1 are kept connected and are connected with an input VCC, the Vin pin of the chip U1 is kept connected with one end of the capacitor C5, one end of the capacitor C6 and one end of the switch S1, the other end of the switch S1 is kept connected with the positive electrode of the power BT1, and the negative electrode of the power BT1, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C1, the other end of the capacitor C2 and the GND pin of the chip U1 are kept connected and grounded;
one end of the capacitor C3 is connected with one end of the resistor R2 and is connected with the input end VCC, the other end of the resistor R2 is respectively connected with the cathode of the voltage stabilizing diode U2, one end of the capacitor C4 and one end of the capacitor C7 and is used for inputting AVref signals, and the other end of the capacitor C3, the anode of the voltage stabilizing diode U2, the other end of the capacitor C4 and the other end of the capacitor C7 are connected and grounded.
3. The current alarm detection board according to claim 2, wherein the dual operational amplifier chip circuit (2) includes a connector JP1, a connector JP2, a switch S2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, an operational amplifier U3A, and an operational amplifier U3B;
wherein the 1 st pin and the 2 nd pin of the connector JP1 are both kept connected with the 2 nd pin of the switch S2, the 3 rd pin of the switch S2 is kept connected with one end of the resistor R6 and one end of the resistor R7 respectively, the other end of the resistor R6 is kept connected with one end of the resistor R9, the 1 st pin of the connector JP2, the 2 nd pin, one end of the resistor R12 and one end of the resistor R15 respectively, the 1 st pin of the switch S2 is kept connected with the other end of the resistor R12 and one end of the resistor R13 respectively, the other end of the resistor R7 is kept connected with the non-inverting input end of the operational amplifier U3A and one end of the resistor R11 respectively, the other end of the resistor R9 is kept connected with the inverting input end of the operational amplifier U3A, one end of the resistor R10 and one end of the capacitor C9 respectively, the output end of the operational amplifier U3A is connected with the other end of the resistor R10, the other end of the capacitor C9 and one end of the resistor R8, the positive power end of the operational amplifier U3A is connected with the input end VCC, the negative power end of the operational amplifier U3A is grounded, the other end of the resistor R8 is connected with one end of the capacitor C8 and inputs uA signals, the other end of the capacitor C8 is grounded, the other end of the resistor R13 is connected with one end of the resistor R16 and the non-inverting input end of the operational amplifier U3B, the other end of the resistor R15 is connected with the inverting input end of the operational amplifier U3B, one end of the resistor R17 and one end of the capacitor C11 respectively, the output end of the operational amplifier U3B is connected with the other end of the resistor R17, the other end of the capacitor C11 and one end of the resistor R14 respectively, the other end of the resistor R14 is connected with one end of the capacitor C10 and inputs mA signals, the other end of the capacitor C10 is grounded.
4. A current alarm detection plate according to claim 3, wherein said monochrome display module circuit (3) comprises a display LCD, a resistor R1, a resistor R3 and a resistor R4;
the 1 st pin of the display screen LCD is grounded, the 3 rd pin of the display screen LCD is respectively connected with one end of the resistor R1 and one end of the resistor R4, the other end of the resistor R1 is connected with the input end VCC, the other end of the resistor R4 is grounded, the 16 th pin of the display screen LCD is connected with one end of the resistor R3, the other end of the resistor R3 is grounded, and the 2 nd pin and the 15 th pin of the display screen LCD are both connected with the input end VCC.
5. The current alarm detection board according to claim 4, wherein the buzzer amplifying circuit (4) includes a resistor R5, a buzzer Beep1, and a transistor Q1;
the input end VCC is connected to buzzer Beep1 one end, triode Q1 collecting electrode keeps being connected is connected to buzzer Beep1 other end, triode Q1 projecting pole ground connection, triode Q1 base with resistance R5 one end is connected, input signal BEEP is connected to the resistance R5 other end.
6. The current alarm detection board according to claim 5, wherein the single-chip microcomputer chip circuit (5) comprises a single-chip microcomputer chip U4;
the 3 rd pin output AVref signal of the single chip microcomputer chip U4 is kept connected with the power supply circuit (1), the 4 th pin output uA signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R8 and one end of the capacitor C8, the 4 th pin output mA signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R14 and one end of the capacitor C10, and the 6 th pin output BEEP signal of the single chip microcomputer chip U4 is kept connected with the other end of the resistor R5;
the LED display screen comprises a display screen LCD, a single chip microcomputer chip U4, a display screen LCD, a display screen LED, a control circuit and a control circuit, wherein the single chip microcomputer chip U4 is characterized in that a 23 rd pin, a 24 th pin, a 25 th pin, a 26 th pin, a 27 th pin, a 28 th pin, a 1 st pin and a 2 nd pin are sequentially connected with a 7 th pin, an 8 th pin, a 9 th pin, a 10 th pin, an 11 th pin, a 12 th pin, a 13 th pin and a 14 th pin of the display screen LCD, an 18 th pin of the single chip microcomputer chip U4 is connected with a 5 th pin of the display screen LCD and inputs RW signals, and a 17 th pin of the single chip microcomputer chip U4 is connected with a 4 th pin of the display screen LCD and inputs RS signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320676789.7U CN220289726U (en) | 2023-03-24 | 2023-03-24 | Current alarm detection plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320676789.7U CN220289726U (en) | 2023-03-24 | 2023-03-24 | Current alarm detection plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220289726U true CN220289726U (en) | 2024-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320676789.7U Active CN220289726U (en) | 2023-03-24 | 2023-03-24 | Current alarm detection plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220289726U (en) |
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2023
- 2023-03-24 CN CN202320676789.7U patent/CN220289726U/en active Active
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