A nixie tube display circuit and voltage temperature monitor meter

Abstract

The utility model provides a kind of nixie tube display circuit, including at least one digital display unit, the digital display unit is divided into row display subunit and column display subunit, between row display subunit and row display subunit, column display subunit and column display subunit or between row display subunit and column display subunit, two IO ports are shared, the LED light unit connection is connected between the two IO ports by parallel and reverse setting, the current flow between two IO ports is controlled to light one LED light unit to light the row display subunit or column display subunit corresponding to the LED light unit.The utility model also provides a kind of voltage temperature monitoring table, and the circuit board of voltage temperature monitoring table uses the nixie tube display circuit as described above.

Description

Technical Field

[0001] This utility model relates to a digital tube display circuit. Background Technology

[0002] A typical seven-segment display has three digits (8), two decimal points, and two unit icons, totaling 28 display units. Normal row and column display requires at least 5 I / O ports per row and 6 I / O ports per column, totaling 11 I / O ports. Two seven-segment displays together would require at least 5 rows and 12 columns, or 17 I / O ports. Therefore, this results in an excessive number of I / O ports being used. Utility Model Content

[0003] The main technical problem to be solved by this utility model is to provide a digital tube display circuit in which the driving I / O ports are fewer than those required for normal row and column driving.

[0004] To solve the above-mentioned technical problems, this utility model provides a digital tube display circuit, including at least one digital display unit. The digital display unit is divided into a row display subunit and a column display subunit. The row display subunits share two I / O ports, and the column display subunits share two I / O ports. The two I / O ports are connected by LED light-emitting units that are connected in parallel and arranged in opposite directions. By controlling the current flow between the two I / O ports, one of the LED light-emitting units is lit up, thereby lighting up the row display subunit or column display subunit corresponding to that LED light-emitting unit.

[0005] In a preferred embodiment: it further includes a unit display unit and a decimal point display unit; the unit display unit and the decimal point display unit, or the unit display unit and the row display subunit, or the unit display unit and the column display subunit, or the decimal point display unit and the row display subunit, or the decimal point display unit and the column display subunit share two I / O ports. The two I / O ports are connected by LED light-emitting units that are connected in parallel and arranged in opposite directions. By controlling the current flow between the two I / O ports, one of the LED light-emitting units is lit up, thereby lighting up the row display subunit, column display subunit, unit display unit, or decimal point display unit corresponding to that LED light-emitting unit.

[0006] This utility model also provides a voltage and temperature monitoring meter, on which the digital tube display circuit described above is used on the circuit board.

[0007] In a preferred embodiment: the circuit board further includes an MCU main controller, a power supply circuit, a temperature acquisition circuit, and a voltage acquisition circuit; the power supply circuit is used to supply power to the MCU main controller; the temperature acquisition circuit and the voltage acquisition circuit are respectively connected to the analog signal input terminal of the MCU main controller, and the digital signal output terminal of the MCU main controller is connected to the digital tube display circuit.

[0008] In a preferred embodiment: the power supply circuit is powered by two supply voltages. The first supply voltage is input through pin 1 of connector J5, filtered by diode D1 and capacitor C5, and then provides voltage to voltage regulator chip U4. The second supply voltage is input through pin 2 of connector J5, filtered by diode D2 and capacitor C5, and then provides voltage to voltage regulator chip U4. The voltage regulator chip outputs a 5V voltage, which is then filtered by capacitors C6 and C7 before powering the MCU main control unit.

[0009] In a preferred embodiment: In the temperature acquisition circuit, the first power supply voltage is divided by resistors R16 and R19, filtered by capacitor C3, and then acquired by pin 2 of the AD port controlled by the MCU for analog-to-digital conversion; the second power supply voltage is also divided by resistors R21 and R22, filtered by capacitor C9, and then acquired by pin 3 of the AD port controlled by the MCU for analog-to-digital conversion.

[0010] In a preferred embodiment: the temperature acquisition circuit is divided into two paths. In the first path, the temperature acquisition circuit is connected to resistor R17 via connector J4 to perform voltage division based on 5V, and then filtered by resistor R18 and capacitor C4 before being acquired by pin 5 of the MCU's AD port and converted from analog to digital. In the second path, the temperature acquisition circuit is connected to resistor R13 via connector J2 to perform voltage division based on 5V, and then filtered by resistor R15 and capacitor C1 before being acquired by pin 6 of the MCU's AD port and converted from analog to digital.

[0011] In a preferred embodiment: the circuit board further includes an alarm output circuit, where pin 8 of the MCU main control outputs an alarm signal to the switch Q1 of the alarm output circuit, and the alarm signal is amplified and voltage-amplified by the MOSFET Q1 and output to the connector J3; the capacitor C10 of the alarm output circuit is connected to J3 for power supply filtering of the alarm, and the capacitor C8 is connected in parallel between the two pins of the connector J3 to absorb interference signals; the resistor R20 of the alarm output circuit is connected between pin 1 of the switch Q1 and GND.

[0012] In a preferred embodiment: the circuit board also includes a reset circuit, in which resistor R14 and capacitor C2 are connected in series to a 5V voltage to form an RC charging circuit to provide a power-on reset for the MCU.

[0013] In a preferred embodiment, the circuit board also includes a program burning port, which is controlled by a programmer and a host computer to download and update the firmware of the voltage and temperature monitoring meter.

[0014] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0015] This invention connects two I / O ports via parallel, reverse-oriented LED light-emitting units, allowing the two I / O ports to be shared by two display units, thus significantly reducing the number of I / O ports. Therefore, fewer I / O ports are needed for normal row and column driving. Furthermore, through the MCU's I / O drive intensity adjustment function, the I / O ports can be directly connected to the digital tube, eliminating the need for current-limiting resistors. Attached Figure Description

[0016] Figure 1 This is a block diagram of a preferred embodiment of the present utility model;

[0017] Figure 2 This is an external circuit diagram of the digital tube in a preferred embodiment of the present invention;

[0018] Figure 3 This is a circuit diagram of the MCU in a preferred embodiment of the present invention;

[0019] Figure 4 This is a power supply circuit diagram in a preferred embodiment of the present invention;

[0020] Figure 5 This is a voltage acquisition circuit diagram in a preferred embodiment of the present invention;

[0021] Figure 6 This is a temperature acquisition circuit diagram in a preferred embodiment of the present invention;

[0022] Figure 7 This is a circuit diagram of the alarm output in a preferred embodiment of the present invention;

[0023] Figure 8 This is a reset circuit diagram in a preferred embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram of each display unit of the digital tube in a preferred embodiment of the present invention;

[0025] Figure 10 This is an internal circuit diagram of the digital tube in a preferred embodiment of the present invention. Detailed Implementation

[0026] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0027] refer to Figure 9 and Figure 10 This embodiment provides a digital tube display circuit, including three digital display units. The digital display units are divided into row display subunits and column display subunits. The row display subunits share two I / O ports with each other, column display subunits share two other I / O ports with each other, or row display subunits share two other I / O ports with each other. The two I / O ports are connected by LED light-emitting units that are connected in parallel and in opposite directions. By controlling the current flow between the two I / O ports, one of the LED light-emitting units is lit up, thereby lighting up the row display subunit or column display subunit corresponding to that LED light-emitting unit.

[0028] It also includes a unit display unit and a decimal point display unit; the unit display unit and the decimal point display unit, or the unit display unit and the row display subunit, or the unit display unit and the column display subunit, or the decimal point display unit and the row display subunit, or the decimal point display unit and the column display subunit share two I / O ports. The two I / O ports are connected by LED light-emitting units that are connected in parallel and arranged in opposite directions. By controlling the current flow between the two I / O ports, one of the LED light-emitting units is lit up, thereby lighting up the row display subunit, column display subunit, unit display unit, or decimal point display unit corresponding to that LED light-emitting unit.

[0029] Specifically, in this embodiment, the first digit 8 is divided into row display subunits A1, G1, and D1, and column display subunits B1, C1, E1, and F1; the second digit 8 is divided into row display subunits A2, G2, and D2, and column display subunits B2, C2, E2, and F2; the third digit 8 is divided into row display subunits A3, G3, and D3, and column display subunits B3, C3, E3, and F3. In addition, it includes decimal point display units DP1 and DP2, and unit display units K1 and K2. Since it is used in a voltage and temperature monitoring meter, the units displayed by unit display units K1 and K2 are ℃ and V, respectively. If it is used in other fields, other units can be displayed.

[0030] refer to Figure 10As can be seen, row display subunit A1 and column display subunit F1 share I / O ports 2 and 3. Row display subunit B1 and column display subunit G1 share I / O ports 2 and 4. Row display subunit A2 and column display subunit F2 share I / O ports 5 and 4. Row display subunit B2 and column display subunit G2 share I / O ports 3 and 5. Row display subunit A3 and column display subunit F3 share I / O ports 1 and 6. Row display subunit B3 and column display subunit G3 share I / O ports 3 and 6. Only 6 I / O ports are needed to complete the connection of all display units.

[0031] refer to Figure 1-8 This embodiment also provides a voltage and temperature monitoring meter, on which the digital tube display circuit described above is used on the circuit board of the voltage and temperature monitoring meter.

[0032] To enable voltage and temperature monitoring, the circuit board also includes an MCU main controller, a power supply circuit, a temperature acquisition circuit, and a voltage acquisition circuit. The power supply circuit powers the MCU main controller. The temperature and voltage acquisition circuits are connected to the analog signal input terminals of the MCU main controller, and the digital signal output terminals of the MCU main controller are connected to the digital tube display circuit. The power supply circuit is powered by two supply voltages. The first supply voltage is input through pin 1 of connector J5, passes through diode D1, and is filtered by capacitor C5 before supplying voltage to the voltage regulator chip U4. The second supply voltage is input through pin 2 of connector J5, passes through diode D2, and is filtered by capacitor C5 before supplying voltage to the voltage regulator chip U4. The voltage regulator chip outputs a 5V voltage, which is then filtered by capacitors C6 and C7 before powering the MCU main controller. In the temperature acquisition circuit, the first power supply voltage is divided by resistors R16 and R19, filtered by capacitor C3, and then acquired and converted to digital by pin 2 of the MCU's AD port. Similarly, the second power supply voltage is divided by resistors R21 and R22, filtered by capacitor C9, and then acquired and converted to digital by pin 3 of the MCU's AD port. The temperature acquisition circuit is divided into two paths. In the first path, connector J4 connects to resistor R17 to divide the voltage based on 5V, then performs RC filtering with resistor R18 and capacitor C4, and finally acquires and converts the voltage based on 5V by pin 5 of the MCU's AD port. In the second path, connector J2 connects to resistor R13 to divide the voltage based on 5V, then performs RC filtering with resistor R15 and capacitor C1, and finally acquires and converts the voltage based on 5V by pin 6 of the MCU's AD port.

[0033] The circuit board also includes an alarm output circuit. The MCU main control pin 8 outputs an alarm signal to the switch Q1 of the alarm output circuit. The alarm signal is amplified and voltage-amplified by the MOSFET Q1 and output to the connector J3. The capacitor C10 of the alarm output circuit is connected to J3 for power supply filtering of the alarm. The capacitor C8 is connected in parallel between the two pins of the connector J3 to absorb interference signals. The resistor R20 of the alarm output circuit is connected between pin 1 of the switch Q1 and GND to ensure that Q1 is in the off state during power-on reset.

[0034] The circuit board also includes a reset circuit, in which resistor R14 and capacitor C2 are connected in series to a 5V voltage to form an RC charging circuit, providing a power-on reset for the MCU. The circuit board also includes a programmable port, which, through a programmer and host computer control, allows for the downloading and updating of the firmware for the voltage and temperature monitoring meter.

[0035] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A digital tube display circuit, characterized in that: It includes at least one digital display unit, which is divided into row display subunits and column display subunits. The row display subunits share two I / O ports with each other, column display subunits share two other I / O ports with each other, or row display subunits share two other I / O ports with each other. The two I / O ports are connected by LED light-emitting units that are connected in parallel and in opposite directions. By controlling the current flow between the two I / O ports, one of the LED light-emitting units is lit up, thereby lighting up the row display subunit or column display subunit corresponding to that LED light-emitting unit.

2. A digital tube display circuit according to claim 1, characterized in that: It also includes a unit display unit and a decimal point display unit; the unit display unit and the decimal point display unit, or the unit display unit and the row display subunit, or the unit display unit and the column display subunit, or the decimal point display unit and the row display subunit, or the decimal point display unit and the column display subunit share two I / O ports. The two I / O ports are connected by LED light-emitting units that are connected in parallel and arranged in opposite directions. By controlling the current flow between the two I / O ports, one of the LED light-emitting units is lit up, thereby lighting up the row display subunit, column display subunit, unit display unit, or decimal point display unit corresponding to that LED light-emitting unit.

3. A voltage and temperature monitoring meter, characterized in that: The circuit board of the voltage and temperature monitoring meter uses the digital tube display circuit as described in any one of claims 1 or 2.

4. A voltage and temperature monitoring meter according to claim 3, characterized in that: The circuit board also includes an MCU main controller, a power supply circuit, a temperature acquisition circuit, and a voltage acquisition circuit; the power supply circuit is used to supply power to the MCU main controller; the temperature acquisition circuit and the voltage acquisition circuit are respectively connected to the analog signal input terminal of the MCU main controller, and the digital signal output terminal of the MCU main controller is connected to the digital tube display circuit.

5. A voltage and temperature monitoring meter according to claim 4, characterized in that: The power supply circuit is powered by two supply voltages. The first supply voltage is input through pin 1 of connector J5, filtered by diode D1 and capacitor C5, and then provides voltage to voltage regulator chip U4. The second power supply voltage is input through pin 2 of connector J5, passes through diode D2, and is filtered by capacitor C5 to provide voltage to voltage regulator chip U4; the voltage regulator chip outputs 5V voltage, which is then filtered by capacitors C6 and C7 to power the MCU main control.

6. A voltage and temperature monitoring meter according to claim 5, characterized in that: In the temperature acquisition circuit, the first power supply voltage is divided by resistors R16 and R19, filtered by capacitor C3, and then acquired by pin 2 of the AD port controlled by the MCU for analog-to-digital conversion; the second power supply voltage is divided by resistors R21 and R22, filtered by capacitor C9, and then acquired by pin 3 of the AD port controlled by the MCU for analog-to-digital conversion.

7. A voltage and temperature monitoring meter according to claim 5, characterized in that: The temperature acquisition circuit is divided into two paths. In the first path, the temperature acquisition circuit is connected to resistor R17 through connector J4 to divide the voltage based on 5V. After RC filtering through resistor R18 and capacitor C4, the temperature is acquired by pin 5 of the MCU's AD port and converted from analog to digital. The second temperature acquisition circuit connects to resistor R13 via connector J2 to divide the voltage based on 5V. After RC filtering via resistor R15 and capacitor C1, the temperature is acquired by pin 6 of the MCU's AD port and converted from analog to digital.

8. A voltage and temperature monitoring meter according to claim 3, characterized in that: The circuit board also includes an alarm output circuit. The MCU main control pin 8 outputs an alarm signal to the switch Q1 of the alarm output circuit. The alarm signal is amplified and voltage-amplified by the MOSFET Q1 and output to the connector J3. The capacitor C10 of the alarm output circuit is connected to J3 for power supply filtering of the alarm. The capacitor C8 is connected in parallel between the two pins of the connector J3 to absorb interference signals. The resistor R20 of the alarm output circuit is connected between pin 1 of the switch Q1 and GND.

9. A voltage and temperature monitoring meter according to claim 8, characterized in that: The circuit board also includes a reset circuit, in which resistor R14 and capacitor C2 are connected in series to a 5V voltage to form an RC charging circuit, providing a power-on reset for the MCU.

10. A voltage and temperature monitoring meter according to claim 3, characterized in that: The circuit board also includes a program burning port, which, through a programmer and a host computer, allows for the downloading and updating of the firmware for the voltage and temperature monitoring meter.

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