CN215067925U - Adjustable high-precision voltage output circuit and equipment - Google Patents
Adjustable high-precision voltage output circuit and equipment Download PDFInfo
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- CN215067925U CN215067925U CN202121392265.2U CN202121392265U CN215067925U CN 215067925 U CN215067925 U CN 215067925U CN 202121392265 U CN202121392265 U CN 202121392265U CN 215067925 U CN215067925 U CN 215067925U
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Abstract
The utility model provides an adjustable high accuracy voltage output circuit, include: a single chip microcomputer minimum system; the power supply circuit is connected with the singlechip minimum system and used for supplying power to the singlechip minimum system; the DA conversion circuit is connected with the minimum system of the single chip microcomputer and is used for outputting a voltage signal; the acquisition circuit is connected with the minimum system of the single chip microcomputer and is used for adjusting the size of an output voltage signal; the display module is connected with the minimum system of the single chip microcomputer and used for displaying the size of the voltage signal output by the DA conversion circuit; the utility model discloses in can realize the regulation to its output voltage through adjusting the resistance change among the acquisition circuit, singlechip minimum system detects corresponding magnitude of voltage, through DA converting circuit output high accuracy voltage signal, can satisfy the needs of test and detection.
Description
Technical Field
The utility model belongs to the technical field of voltage output equipment, concretely relates to adjustable precision voltage output circuit and equipment.
Background
At present, in the process of testing and quality inspection of electronic products, high-precision voltage signals such as 1.667V voltage signals are generally required to be input into the products, the precision of voltage output by the conventional voltage-stabilized power supply is limited, and the use requirements cannot be met.
Therefore, it is necessary to design a voltage output circuit and a device with adjustable precision to solve the technical problems faced by the prior art.
Disclosure of Invention
To the not enough that exists among the prior art, the utility model provides an adjustable precision voltage output circuit and equipment.
The technical scheme of the utility model is that: adjustable high accuracy voltage output circuit includes: a single chip microcomputer minimum system; the power supply circuit is connected with the singlechip minimum system and used for supplying power to the singlechip minimum system; the DA conversion circuit is connected with the minimum system of the single chip microcomputer and is used for outputting a voltage signal; the acquisition circuit is connected with the minimum system of the single chip microcomputer and is used for adjusting the size of an output voltage signal; and the display module is connected with the minimum system of the single chip microcomputer and is used for displaying the size of the voltage signal output by the DA conversion circuit.
The acquisition circuit has an operational amplifier; the inverting input end of the operational amplifier is connected with the output end of the power supply circuit through a resistor R10 and a resistor R9, and an adjustable resistor R15 is connected between the resistor R9 and the resistor R10; a resistor R11 and a resistor R12 are connected in parallel to a positive input end of the operational amplifier, the positive input end of the operational amplifier is connected with an output end of the power supply circuit through the resistor R11, and the positive input end of the operational amplifier is grounded through a resistor R12; a resistor R13 is connected in series between the inverting input end of the operational amplifier and the output end of the operational amplifier; the output end of the operational amplifier is connected with the SCM minimum system through a resistor R14, and one end of the resistor R14 connected with the SCM minimum system is grounded through a diode D3 and a capacitor C6 respectively.
The DA conversion circuit is provided with a TLC5615 digital-to-analog converter connected with the single-chip microcomputer minimum system.
The DIN end, the SCLK end and the CS end of the TLC5615 digital-to-analog converter are connected with the minimum system of the single chip microcomputer, the DOUT end of the TLC5615 digital-to-analog converter is grounded through a resistor R6, the VDD end of the TLC5615 digital-to-analog converter is connected with the output end of the power supply circuit, the REFIN end of the TLC5615 digital-to-analog converter is connected with the output end of the power supply circuit through a resistor R4, the REFIN end of the TLC5615 digital-to-analog converter is grounded through a resistor R5, and a voltage signal is output between the OUT end and the AGND end of the TLC5615 digital-to-analog converter.
The power supply circuit is provided with a K7805-500R2 power supply module, the input end of the K7805-500R2 power supply module is connected with an input power supply through a diode D1, the input end of the K7805-500R2 power supply module is grounded through a capacitor C1 and a capacitor C2, and the output end of the K7805-500R2 power supply module is grounded through a C3.
The minimum system of the single chip microcomputer is provided with a PIC16F690-I/SO single chip microcomputer chip.
Adjustable high accuracy voltage output device, including as above adjustable high accuracy voltage output circuit and shell, the outside of shell is provided with input jack, output jack, adjustable resistance and display screen.
The utility model has the advantages that:
(1) the utility model can realize the adjustment of the output voltage by adjusting the resistance value change in the acquisition circuit, the minimum system of the single chip microcomputer detects the corresponding voltage value, and the high-precision voltage signal is output by the DA conversion circuit, thereby meeting the requirements of testing and detection;
(2) the adjusting operation is simple, convenient and quick, and the working efficiency of testing and detection can be obviously improved.
Drawings
Fig. 1 is a circuit diagram of the adjustable high-precision voltage output circuit of the present invention.
Fig. 2 is a circuit diagram of the minimum system of the single chip microcomputer of the present invention.
Fig. 3 is a circuit diagram of the middle acquisition circuit of the present invention.
Fig. 4 is a circuit diagram of the DA conversion circuit of the present invention.
Fig. 5 is a circuit diagram of the display module of the present invention.
Fig. 6 is a circuit diagram of the power supply circuit of the present invention.
Fig. 7 is the structure diagram of the adjustable high-precision voltage output device of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the invention, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in fig. 1, the adjustable high-precision voltage output circuit includes: a single chip microcomputer minimum system; the power circuit is connected with the minimum system of the single chip microcomputer and used for supplying power to the minimum system of the single chip microcomputer; the DA conversion circuit is connected with the minimum system of the single chip microcomputer and is used for outputting a voltage signal; the acquisition circuit is connected with the minimum system of the single chip microcomputer and is used for adjusting the size of the output voltage signal; the display module is connected with the minimum system of the single chip microcomputer and used for displaying the size of the voltage signal output by the DA conversion circuit; in this embodiment, the output voltage can be adjusted by adjusting the resistance value change in the acquisition circuit, the minimum system of the single chip microcomputer detects a corresponding voltage value, and a high-precision voltage signal is output through the DA conversion circuit, so that the requirements of testing and detection can be met.
As a specific embodiment of the acquisition circuit, as shown in fig. 3, the acquisition circuit has an operational amplifier; the inverting input end of the operational amplifier is connected with the output end of the power supply circuit through a resistor R10 and a resistor R9, and an adjustable resistor R15 is connected between the resistor R9 and the resistor R10; the positive input end of the operational amplifier is connected with a resistor R11 and a resistor R12 in parallel, the positive input end of the operational amplifier is connected with the output end of the power supply circuit through a resistor R11, and the positive input end of the operational amplifier is grounded through a resistor R12; a resistor R13 is connected in series between the inverting input end of the operational amplifier and the output end of the operational amplifier; the output end of the operational amplifier is connected with the singlechip minimum system through a resistor R14, and one end of a resistor R14 connected with the singlechip minimum system is grounded through a diode D3 and a capacitor C6 respectively; the resistor R9, the resistor R10, the resistor R11, the resistor R12, the resistor R13 and the operational amplifier form a voltage parallel negative feedback circuit, wherein the resistance value of the adjustable resistor R15 is changed between 1000-1500 omega, and when the resistance value is adjustable to 1000 omega; the output end of the operational amplifier outputs 4.7V voltage; when the adjustable resistor is 1500 omega, the output end of the operational amplifier outputs 0.5V voltage, and the minimum system of the single chip microcomputer detects that the corresponding voltage value outputs a high-precision voltage value through the DA conversion circuit; wherein the operational amplifier is LM158DT operational amplifier.
As a specific embodiment of the DA conversion circuit, as shown in fig. 4, the DA conversion circuit has a TLC5615 digital-to-analog converter connected to a minimum system of a single chip microcomputer; more specifically, the DIN terminal, the SCLK terminal, and the CS terminal of the TLC5615 digital-to-analog converter are connected to the minimum system of the single chip microcomputer, the DOUT terminal of the TLC5615 digital-to-analog converter is grounded via a resistor R6, the VDD terminal of the TLC5615 digital-to-analog converter is connected to the output terminal of the power circuit, the REFIN terminal of the TLC5615 digital-to-analog converter is connected to the output terminal of the power circuit via a resistor R4, the REFIN terminal of the TLC5615 digital-to-analog converter is grounded via a resistor R5, a voltage signal is output between the OUT terminal and the AGND terminal of the TLC5615 digital-to-analog converter, and the TLC5615 digital-to-analog converter obtains a control signal of the minimum system of the single chip microcomputer and outputs a high-precision voltage signal.
As a specific embodiment of the power circuit, as shown in fig. 2, the power circuit has a power module K7805-500R2, an input terminal of the power module K7805-500R2 is connected to an input power source via a diode D1, an input terminal of the power module K7805-500R2 is grounded via a capacitor C1 and a capacitor C2, respectively, and an output terminal of the power module K7805-500R2 is grounded via a capacitor C3; the power circuit adopts a 12V power supply to supply power, enters a K7805-500R2 power module through a diode D1, and outputs 5V voltage after voltage reduction for a minimum system and a circuit of the single chip microcomputer.
As a specific embodiment of the minimum system of the single chip microcomputer, as shown in fig. 2, the minimum system of the single chip microcomputer has a PIC16F690-I/SO single chip microcomputer chip and its minimum system, and a download circuit for data transmission.
As a specific implementation manner of the display module, as shown in fig. 5, the display module has an OLED display screen, and the OLED display screen is connected to the minimum system of the single chip.
The embodiment also discloses adjustable high-precision voltage output equipment, which comprises an adjustable high-precision voltage output circuit and a shell 1 in the embodiment, wherein an input jack 3, an output jack 2, an adjustable resistor 4 and a display screen 5 are arranged on the outer side of the shell 1; the input jack 3 is correspondingly connected with the input end of the power circuit, the output jack 2 is correspondingly connected with the output end of the DA conversion circuit and used for outputting a voltage signal, the adjustable resistor 4 is an adjustable resistor in the acquisition circuit, and the display screen 5 is an OLED display screen in the display module.
Thus far, various embodiments of the present invention have been described in detail. Some details which are well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. An adjustable high-precision voltage output circuit, comprising:
a single chip microcomputer minimum system;
the power supply circuit is connected with the singlechip minimum system and used for supplying power to the singlechip minimum system;
the DA conversion circuit is connected with the minimum system of the single chip microcomputer and is used for outputting a voltage signal;
the acquisition circuit is connected with the minimum system of the single chip microcomputer and is used for adjusting the size of an output voltage signal;
and the display module is connected with the minimum system of the single chip microcomputer and is used for displaying the size of the voltage signal output by the DA conversion circuit.
2. The adjustable high precision voltage output circuit of claim 1, wherein: the acquisition circuit has an operational amplifier; the inverting input end of the operational amplifier is connected with the output end of the power supply circuit through a resistor R10 and a resistor R9, and an adjustable resistor R15 is connected between the resistor R9 and the resistor R10; a resistor R11 and a resistor R12 are connected in parallel to a positive input end of the operational amplifier, the positive input end of the operational amplifier is connected with an output end of the power supply circuit through the resistor R11, and the positive input end of the operational amplifier is grounded through a resistor R12; a resistor R13 is connected in series between the inverting input end of the operational amplifier and the output end of the operational amplifier; the output end of the operational amplifier is connected with the SCM minimum system through a resistor R14, and one end of the resistor R14 connected with the SCM minimum system is grounded through a diode D3 and a capacitor C6 respectively.
3. The adjustable high precision voltage output circuit of claim 1, wherein: the DA conversion circuit is provided with a TLC5615 digital-to-analog converter connected with the single-chip microcomputer minimum system.
4. An adjustable high precision voltage output circuit according to claim 3, wherein: the DIN end, the SCLK end and the CS end of the TLC5615 digital-to-analog converter are connected with the minimum system of the single chip microcomputer, the DOUT end of the TLC5615 digital-to-analog converter is grounded through a resistor R6, the VDD end of the TLC5615 digital-to-analog converter is connected with the output end of the power supply circuit, the REFIN end of the TLC5615 digital-to-analog converter is connected with the output end of the power supply circuit through a resistor R4, the REFIN end of the TLC5615 digital-to-analog converter is grounded through a resistor R5, and a voltage signal is output between the OUT end and the AGND end of the TLC5615 digital-to-analog converter.
5. The adjustable high precision voltage output circuit of claim 1, wherein: the power supply circuit is provided with a K7805-500R2 power supply module, the input end of the K7805-500R2 power supply module is connected with an input power supply through a diode D1, the input end of the K7805-500R2 power supply module is grounded through a capacitor C1 and a capacitor C2, and the output end of the K7805-500R2 power supply module is grounded through a C3.
6. The adjustable high precision voltage output circuit of claim 1, wherein: the minimum system of the single chip microcomputer is provided with a PIC16F690-I/SO single chip microcomputer chip.
7. An adjustable high-precision voltage output device, which is characterized by comprising the adjustable high-precision voltage output circuit as claimed in any one of claims 1 to 6 and a shell, wherein the outer side of the shell is provided with an input jack, an output jack, an adjustable resistor and a display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121392265.2U CN215067925U (en) | 2021-06-22 | 2021-06-22 | Adjustable high-precision voltage output circuit and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121392265.2U CN215067925U (en) | 2021-06-22 | 2021-06-22 | Adjustable high-precision voltage output circuit and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215067925U true CN215067925U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121392265.2U Active CN215067925U (en) | 2021-06-22 | 2021-06-22 | Adjustable high-precision voltage output circuit and equipment |
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| Country | Link |
|---|---|
| CN (1) | CN215067925U (en) |
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2021
- 2021-06-22 CN CN202121392265.2U patent/CN215067925U/en active Active
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