CN203299348U - Four-state level tester - Google Patents
Four-state level tester Download PDFInfo
- Publication number
- CN203299348U CN203299348U CN2013203722903U CN201320372290U CN203299348U CN 203299348 U CN203299348 U CN 203299348U CN 2013203722903 U CN2013203722903 U CN 2013203722903U CN 201320372290 U CN201320372290 U CN 201320372290U CN 203299348 U CN203299348 U CN 203299348U
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- voltage comparator
- switching diode
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a four-state level tester. The four-state level tester comprises a 5 V direct-current power supply, a level signal amplitude limiting circuit, a voltage reference circuit, a high level display circuit, a low level display circuit, a high resistance state identifying circuit and a high resistance state display circuit, and a model of an integrated circuit employed by a voltage comparator IC1 is LM339. The four-state level tester can be operated among a plurality of large-scale on-line cabinet frames and industrial control equipment to very conveniently complete the work which a universal meter cannot, and the four-state level tester also can substitute an oscilloscope to complete a part of testing work with smart and convenient characteristics which the universal meter and the oscilloscope do not have. And particularly, the four-state level tester can display logic states visually, clearly and unequivocally, and according to an indication of a light emitting diode (LED), the four-state level tester can display whether a tested point in a circuit has a high level state or a low level state, has a pulse level or not, and has a positive pulse property or a negative pulse property very visually and in real time.
Description
Technical field
The utility model belongs to the Electronic Testing Technology field, relates to a kind of four state LMSs.
Background technology
A lot of electronic products are in development and performance history, and the debugging work of circuit hardware part occupies very large proportion.Along with the function of electronic product is more and more intelligent, circuit design also becomes increasingly complex, and especially uses the application of the digital circuits such as single-chip microcomputer to be seen everywhere especially.The technician is in monitoring and the debugging of the instantaneous saltus step level of the H to digital circuit, L, high-impedance state, digit pulse, just need to coordinate with instruments such as oscillograph, signal generator, frequency meter, logic testers, the signal momentary status that could in good time grasp the circuit key point changes.These problems under lab are easy to solve, but at scenes such as project installation, debugging and maintenances, the carrying of these surveying instruments, put and use etc. is exactly a problem.Even if these instruments have the technical skill personnel operation, using is also a pretty troublesome thing.
Can so, there is there a kind of meet the need, simple and practical testing tool? and can meet make simple, be easy to carry, requirement easy to use.Here it is a kind of level detecting instrument described in the utility model: four state LMSs.
Four state LMSs are a kind of common tools that detect each key point logic state in digital circuit, logic state in digital circuit generally is divided into: high level " 1 ", low level " 0 ", 4 kinds of states of high impedance (being vacant state) and pulse (i.e. the high and low variation of uninterrupted generation).
The circuit of making four state LMSs has a lot, considers the factors such as easy to make, with low cost, and the utility model uses some Resistor-Capacitor Units commonly used, switching diode, light emitting diode etc. with one piece of common LM339, periphery.
Four state LMSs carry out between some large-scale online tank brackets, industrial control equipment, can complete easily the work that multimeter can't be completed, can replace oscillograph to complete a part of testing, and have the incomparable dexterity of multimeter, oscillograph characteristics easily.Especially logic state intuitive display, clear and definite, according to the indication of LED, whether can demonstrate very intuitively, in real time the circuit measured point is high level or low level, be impulse level, pulse character is just or negative.
Below describe four state LMSs described in the utility model related relevant technologies content in implementation process in detail.
The utility model content
Goal of the invention and beneficial effect: along with the function of electronic product is more and more intelligent, its circuit design also becomes increasingly complex, and especially uses the application of the digital circuits such as single-chip microcomputer to be seen everywhere especially.The technician is in monitoring and the debugging of the instantaneous saltus step level of the H to digital circuit, L, high-impedance state, digit pulse, just need to have the instruments such as oscillograph, signal generator, frequency meter, logic tester to coordinate, the signal momentary status that could in good time grasp the circuit key point changes.The circuit of making four state LMSs has a lot, considers the factors such as easy to make, with low cost, and the utility model uses some Resistor-Capacitor Units commonly used, switching diode, light emitting diode etc. with one piece of common LM339, periphery.
Four state LMSs carry out between some large-scale online tank brackets, industrial control equipment, can complete easily the work that multimeter can't be completed, can replace oscillograph to complete a part of testing, and have the incomparable dexterity of multimeter, oscillograph characteristics easily.Especially logic state intuitive display, clear and definite, according to the indication of LED, whether can demonstrate very intuitively, in real time the circuit measured point is high level or low level, be impulse level, pulse character is just or negative.
The circuit working principle: four state LMSs described in the utility model use some Resistor-Capacitor Units commonly used, switching diode, light emitting diode etc. with one piece of common LM339, periphery.The utility model uses the LED of 3 different colours to show in real time for the test result of digital circuit logic state, the logic state corresponding relation of the color of LED and the test of four state LMSs is: red expression high level " 1 ", green expression low level " 0 ", yellow expression " high impedance ", redly, green replace luminous indicating impulse state.According to the indication of LED, whether can demonstrate very intuitively, in real time the circuit measured point is high level or low level, be impulse level, and the character of pulse just is or bears.
Technical scheme: four state LMSs, it comprises 5V direct supply, level signal amplitude limiter circuit, reference voltage circuit, high level display circuit, low level display circuit, high-impedance state identification circuit, high-impedance state display circuit, it is characterized in that:
The level signal amplitude limiter circuit: it is comprised of detector probe TS, resistance R 0, switching diode D1 and resistance R 1, switching diode D2 and resistance R 2, detector probe TS connects positive pole and an end of resistance R 1 and negative pole and an end of resistance R 2 and the 6th pin and the 9th pin of voltage comparator ic 1 of switching diode D2 of switching diode D1 by resistance R 0, the anodal VCC of the other end connection circuit of the negative pole of switching diode D1 and resistance R 1, the other end connection circuit ground GND of the positive pole of switching diode D2 and resistance R 2;
In circuit, to select the model of integrated circuit be LM339 to voltage comparator ic 1;
Reference voltage circuit: it is comprised of resistance R 3, resistance R 4 and resistance R 5, the anodal VCC of one termination circuit of resistance R 3, the other end of the 7th pin connecting resistance R3 of voltage comparator ic 1 and an end of resistance R 4, the other end of the 8th pin connecting resistance R4 of voltage comparator ic 1 and an end of resistance R 5, the other end connection circuit ground GND of resistance R 5;
The high level display circuit: the anodal VCC of the 3rd pin connection circuit of voltage comparator ic 1, the 1st pin of voltage comparator ic 1 passes through the negative pole of resistance R 6 sending and receiving optical diode LED1, the anodal VCC of the anodal connection circuit of LED 1;
The low level display circuit: the 12nd pin connection circuit ground GND of voltage comparator ic 1, the 14th pin of voltage comparator ic 1 passes through the negative pole of resistance R 7 sending and receiving optical diode LED2, the anodal VCC of the anodal connection circuit of LED 2;
The high-impedance state identification circuit: it is comprised of switching diode D3, switching diode D4 and resistance R 8, the 1st pin of voltage comparator ic 1 connects the negative pole of switching diode D3, the 14th pin of voltage comparator ic 1 connects the negative pole of switching diode D4, and the positive pole of the positive pole of switching diode D3 and switching diode D4 is by the anodal VCC of resistance R 8 connection circuits;
The high-impedance state display circuit: the 4th pin of voltage comparator ic 1 connects the positive pole of switching diode D3 and the positive pole of switching diode D4, the end of the 5th pin connecting resistance R9 of voltage comparator ic 1 and an end of resistance R 10, the anodal VCC of the other end connection circuit of resistance R 9, the other end connection circuit ground GND of resistance R 10, the 2nd pin of voltage comparator ic 1 passes through the negative pole of resistance R 11 sending and receiving optical diode LED3, the anodal VCC of the anodal connection circuit of LED 3;
The 5V dc power anode is connected with circuit anode VCC, and the 5V dc power cathode is connected with circuit ground GND.
Description of drawings
Accompanying drawing 1 is embodiment circuit working schematic diagram of four state LMSs that the utility model provides.
Embodiment
According to four state LMS circuit working schematic diagram and description of drawings shown in accompanying drawing 1, and according to annexation between components and parts in the described each several part circuit of utility model content, and the components and parts technical parameter described in embodiment requires and the circuit production main points are implemented to realize the utility model, below in conjunction with embodiment, correlation technique of the present utility model is further described.
The selection of components and parts and technical parameter thereof
| No. haoHAO, element number | The components and parts title | Model or technical indicator | Quantity | Remarks |
| IC1 | Voltage comparator | LM339, encapsulation standard DIP | 1 | Dual inline type |
| D1～D4 | Switching diode | 1N4148 | 4 | Glassivation |
| R0 | Metalfilmresistor | 1/8W、4.7?KΩ | 1 | |
| R1、R8、R9、R10 | Metalfilmresistor | 1/8W、100KΩ | 4 | |
| R2 | Metalfilmresistor | 1/8W、560KΩ | 1 | |
| R3 | Metalfilmresistor | 1/8W、27KΩ | 1 | |
| R4 | Metalfilmresistor | 1/8W、18KΩ | 1 | |
| R5 | Metalfilmresistor | 1/8W、5.6KΩ | 1 | |
| R6、R7、R11 | Metalfilmresistor | 1/8W?、680Ω | 3 | |
| LED1～LED3 | Light emitting diode | Red, green, yellow | Each 1 | Diameter is ￠ 5mm |
IC1 is voltage comparator, and the model of selecting is LM339, and the LM339 IC interior has 4 separate voltage comparators, and the present embodiment uses voltage comparator ic 13 voltage comparators wherein;
LED1～LED3 is light emitting diode, selects ￠ 5mm redness, green and yellow light-emitting diode;
DC is electric battery, and the scope of DC voltage is 4.5～6V.
Circuit production main points, circuit debugging and using method
The circuit structure of cause four state LMSs is fairly simple, as long as the electronic devices and components performance of generally selecting is intact, and the components and parts annexation in accompanying drawing 1 is welded to specifications, physical connection line and welding quality are after careful inspection is correct, circuit of the present utility model does not need to carry out any debugging substantially, and the circuit of four state LMSs can work;
Four state LMS appearance designs can be made into a recording pointer size pattern;
when circuit measuring, when the red light of four state LMSs is lighted, can show that in circuit, measured point is high level " H ", if green light is lighted, show that in circuit, measured point is low level " L ", if red, green light is alternately lighted, what show the output of measured point in circuit is impulse level, if the order that LED is lighted is first green rear red, what show measured point output is negative pulse, if the order that LED is lighted is first red rear green, measured point output is positive pulse, after four state LMSs switch on power, amber light namely is lit, when circuit measuring, if amber light also is lit, show that the circuit measured point is high-impedance state.
Claims (1)
1. state LMS, it comprises 5V direct supply, level signal amplitude limiter circuit, reference voltage circuit, high level display circuit, low level display circuit, high-impedance state identification circuit, high-impedance state display circuit, it is characterized in that:
Described level signal amplitude limiter circuit is comprised of detector probe TS, resistance R 0, switching diode D1 and resistance R 1, switching diode D2 and resistance R 2, detector probe TS connects positive pole and an end of resistance R 1 and negative pole and an end of resistance R 2 and the 6th pin and the 9th pin of voltage comparator ic 1 of switching diode D2 of switching diode D1 by resistance R 0, the anodal VCC of the other end connection circuit of the negative pole of switching diode D1 and resistance R 1, the other end connection circuit ground GND of the positive pole of switching diode D2 and resistance R 2;
It is LM339 that described voltage comparator ic 1 is selected the model of integrated circuit;
Described reference voltage circuit is comprised of resistance R 3, resistance R 4 and resistance R 5, the anodal VCC of one termination circuit of resistance R 3, the other end of the 7th pin connecting resistance R3 of voltage comparator ic 1 and an end of resistance R 4, the other end of the 8th pin connecting resistance R4 of voltage comparator ic 1 and an end of resistance R 5, the other end connection circuit ground GND of resistance R 5;
Described high level display circuit: the anodal VCC of the 3rd pin connection circuit of voltage comparator ic 1, the 1st pin of voltage comparator ic 1 passes through the negative pole of resistance R 6 sending and receiving optical diode LED1, the anodal VCC of the anodal connection circuit of LED 1;
Described low level display circuit: the 12nd pin connection circuit ground GND of voltage comparator ic 1, the 14th pin of voltage comparator ic 1 passes through the negative pole of resistance R 7 sending and receiving optical diode LED2, the anodal VCC of the anodal connection circuit of LED 2;
Described high-impedance state identification circuit is comprised of switching diode D3, switching diode D4 and resistance R 8, the 1st pin of voltage comparator ic 1 connects the negative pole of switching diode D3, the 14th pin of voltage comparator ic 1 connects the negative pole of switching diode D4, and the positive pole of the positive pole of switching diode D3 and switching diode D4 is by the anodal VCC of resistance R 8 connection circuits;
Described high-impedance state display circuit: the 4th pin of voltage comparator ic 1 connects the positive pole of switching diode D3 and the positive pole of switching diode D4, the end of the 5th pin connecting resistance R9 of voltage comparator ic 1 and an end of resistance R 10, the anodal VCC of the other end connection circuit of resistance R 9, the other end connection circuit ground GND of resistance R 10, the 2nd pin of voltage comparator ic 1 passes through the negative pole of resistance R 11 sending and receiving optical diode LED3, the anodal VCC of the anodal connection circuit of LED 3;
Described 5V dc power anode is connected with circuit anode VCC, and the 5V dc power cathode is connected with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203722903U CN203299348U (en) | 2013-06-26 | 2013-06-26 | Four-state level tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203722903U CN203299348U (en) | 2013-06-26 | 2013-06-26 | Four-state level tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203299348U true CN203299348U (en) | 2013-11-20 |
Family
ID=49575353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203722903U Expired - Fee Related CN203299348U (en) | 2013-06-26 | 2013-06-26 | Four-state level tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203299348U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344908A (en) * | 2013-06-26 | 2013-10-09 | 黄宇嵩 | Four-state level measuring set |
| CN104808561A (en) * | 2015-04-25 | 2015-07-29 | 航天科技控股集团股份有限公司 | Multi-state switch state collection device and method |
-
2013
- 2013-06-26 CN CN2013203722903U patent/CN203299348U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344908A (en) * | 2013-06-26 | 2013-10-09 | 黄宇嵩 | Four-state level measuring set |
| CN104808561A (en) * | 2015-04-25 | 2015-07-29 | 航天科技控股集团股份有限公司 | Multi-state switch state collection device and method |
| CN104808561B (en) * | 2015-04-25 | 2017-06-20 | 航天科技控股集团股份有限公司 | Multistate switch state collecting device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102520348B (en) | General switch detector | |
| CN101788657B (en) | Calibrating device of leakage current tester | |
| CN103197198A (en) | Cable checker | |
| CN104459604B (en) | Automatic tester applied to intelligent ammeter production line | |
| CN202443104U (en) | Automatic detection platform for IC card water-meter circuit board | |
| CN203299348U (en) | Four-state level tester | |
| CN203217027U (en) | Cable correcting device | |
| CN201765302U (en) | Device for detecting performances of Hall integrated circuit | |
| CN204945296U (en) | A kind of cellular phone data line tester | |
| CN105353292A (en) | Automatic detection device of circuit board of electric energy meter | |
| CN204314449U (en) | A kind of auto testing instrument being applied to intelligent electric meter production line | |
| CN103344908A (en) | Four-state level measuring set | |
| CN205643590U (en) | Multicore cable fault detection ware | |
| CN204989379U (en) | Net twine survey line ware with pilot lamp | |
| CN205643583U (en) | Test wire rod detecting instrument | |
| CN201548649U (en) | Test tooling of single plate | |
| CN204679545U (en) | Level logic test pen | |
| CN105486965B (en) | A kind of cable detector | |
| CN203455391U (en) | Logic pulse signal detection device | |
| CN204228875U (en) | Path break circuit fast detector | |
| CN201035055Y (en) | Duct spreading device of LRC tester | |
| CN207114686U (en) | A kind of rack direct current reserves the test fixture of line | |
| CN204269795U (en) | Power supply automatic detecting equipment | |
| CN204154840U (en) | A kind of cable detector | |
| CN105842578A (en) | Indicator capable of rapidly determining coaxial cable BNC radio frequency head fault types |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20140626 |
|
| EXPY | Termination of patent right or utility model |