CN202421298U - Potential detector for electronic circuit board - Google Patents
Potential detector for electronic circuit board Download PDFInfo
- Publication number
- CN202421298U CN202421298U CN2012200468323U CN201220046832U CN202421298U CN 202421298 U CN202421298 U CN 202421298U CN 2012200468323 U CN2012200468323 U CN 2012200468323U CN 201220046832 U CN201220046832 U CN 201220046832U CN 202421298 U CN202421298 U CN 202421298U
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- triode
- resistor
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- diode
- light emitting
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Abstract
The utility model discloses a potential detector for an electronic circuit board, which is characterized by comprising a power and control circuit, a level test probe circuit, and a display circuit for low, medium and high levels. The power and control circuit is formed by serially connecting a +5V battery E and a switch S. The level test probe circuit comprises a probe G, a resistor R1, a protective diode VD1 and a diode VD2. The display circuit for low, medium and high levels comprises detection amplifier triodes VT1-VT7, a resistor, a green light emitting diode VD3, a red light emitting diode VD4, and a yellow light emitting diode VD5. The light emitting diodes in red, yellow and green in the potential detector are used for displaying high, medium and low levels of a detected circuit, and the potential detector is applicable to testing high, medium and low levels of CMOS (complementary metal oxide semiconductor) and TTL (transistor-transistor Logic) digital integrated circuits, is convenient for observation and catch of high-frequency transient signals, and is helpful to quick search and removal of faults.
Description
Technical field
The utility model relates to electronic equipments, is specifically related to the electronic circuit board electric potential detector.
Background technology
At present CMOS, TTL digital integrated circuit are widely used in robot calculator, digital control, digital communication and the instrument and meter for automation equipment; Use multimeter and oscillograph debugging, to overhaul these electronic equipments often more loaded down with trivial details, particularly be difficult for observing and seizure for the high frequency transient signal.
Summary of the invention
The utility model problem to be solved is how a kind of electronic circuit board electric potential detector is provided; This electronic circuit board electric potential detector adopts the lumination of light emitting diode of red, yellow, green three kinds of different colours; The high, medium and low level that shows circuit-under-test; Can be applicable to the test of the high, medium and low level of CMOS, TTL digital integrated circuit, be convenient to the observation and the seizure of high frequency transient signal, help to seek quickly and fix a breakdown.
The technical matters that the utility model proposed is to solve like this, constructs a kind of electronic circuit board electric potential detector, it is characterized in that: comprise power supply and control circuit, level detecting probe circuit, high, normal, basic level displaing circuit; Power supply and control circuit are connected in series by+5V battery E and switch S; The level detecting probe circuit is made up of probe G, resistor R 1 and protection diode VD1, diode VD2; High, normal, basic level displaing circuit is made up of detection amplifying triode VT1, triode VT2, triode VT3, triode VT4, triode VT5, triode VT6, triode VT7, resistor, green LED VD3, red light emitting diodes VD4, yellow light-emitting diode VD5; Its battery E positive terminal links to each other with an end of diode VD1 negative pole, resistor R 2, resistor R 3, resistor R 5, resistor R 9, resistor R 11 respectively through switch S; Battery E negative pole end is connected with diode VD2 positive pole, triode VT3 emitter, triode VT4 emitter, triode VT5 emitter, triode VT7 emitter, resistor R 7 one ends respectively; Level detecting probe G links to each other with resistor R 1 one ends, and the positive pole of resistor R 1 other end and diode VD1, the negative pole of diode VD2, the base stage of triode VT1, the emitter of triode VT2 are connected; Green LED VD3 is connected on the collector circuit of triode VT4, and its positive and negative electrode is connected with resistor R 5, triode VT4 collector respectively; Red light emitting diodes VD4 and resistance R 8 parallel connections; Yellow light-emitting diode VD5 is connected between triode VT6 emitter and the triode VT7 collector, and yellow light emitting diode VD5 positive pole is connected with triode VT6 emitter, yellow light-emitting diode VD5 negative pole is connected with triode VT7 collector.
The beneficial effect of the utility model is: this electronic circuit board electric potential detector adopts the lumination of light emitting diode of red, yellow, green three kinds of different colours; The high, medium and low level that shows circuit-under-test; Can be widely used in the test of the high, medium and low level of CMOS, TTL digital integrated circuit; Be convenient to the observation and the seizure of high frequency transient signal, help to seek quickly and fix a breakdown.
Description of drawings
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Shown in accompanying drawing 1, when probe G detected circuit and is low level, triode VT1 ended; VT2, VT3 conducting, VCE3＞0.7V, triode VT4 conducting; Green LED VD3 gets electroluminescence; Indication circuit is a low level, and triode VT5, VT6, VT7 all end simultaneously, and light emitting diode VD4, VD5 are all not luminous; When probe G records circuit and is middle level, triode VT1, VT2 conducting, VT3 saturation conduction; VCE3 ≈ 0.3V, triode VT4 ends, and green LED VD3 is not luminous; Triode VT5 ends, and red light emitting diodes VD4 is not luminous, and this moment, the collector of triode VT5 was high level; Triode VT6, VT7 conducting, yellow light-emitting diode VD5 gets electroluminescence, and indication circuit is middle level; When probe G detects circuit and is high level, triode VT1, VT2 conducting, VT3 saturation conduction, VCE3 ≈ 0.3V; Triode VT4 ends, and green LED VD3 is not luminous, and triode VT5 is the saturation conduction state; VCE5 ≈ 0.3V, red light emitting diodes VD4 gets electroluminescence, is expressed as high level; At this moment, triode VT6, VT7 end, and yellow light-emitting diode VD5 is not luminous.In circuit, diode VD1, VD2 form protection circuit against input over-voltage, prevent the too high positive and negative voltage of probe G false touch and damage the electronic circuit board electric potential detector.
Component parameters and points for attention: resistor R 1-R12 selects the carbon film resistor of 1/8W for use; VD1-VD2 selects the IN4148 diode for use; Green LED VD3 selects BT104 for use, and red light emitting diodes VD4 selects BT504 for use, and yellow light-emitting diode VD5 selects BT304 for use; VT1-VT7 selects C9013NPN silicon type triode for use.This product can be assembled into common test pencil pattern; It is 0-0.7V that the electronic circuit board electric potential detector detects the low level scope, and middle level range is 0.9-2.4V, and the high level scope is 2.5-5V.
The utility model also can be made various alternatives; More than through embodiment by accompanying drawing 1 illustrated embodiment; Be that the foregoing of the utility model is done step detailed description, but should this be interpreted as that the scope of the theme that the utility model is above-mentioned only limits to described instance, do not breaking away under the above-mentioned technological thought situation of the utility model; Various replacements and change according to ordinary skill knowledge and customary means are made all should be included in the scope of the utility model.
Claims (1)
1. an electronic circuit board electric potential detector is characterized in that: comprise power supply and control circuit, level detecting probe circuit, high, normal, basic level displaing circuit; Power supply and control circuit are connected in series by+5V battery E and switch S; The level detecting probe circuit is made up of probe G, resistor R 1 and protection diode VD1, diode VD2; High, normal, basic level displaing circuit is made up of detection amplifying triode VT1, triode VT2, triode VT3, triode VT4, triode VT5, triode VT6, triode VT7, resistor, green LED VD3, red light emitting diodes VD4, yellow light-emitting diode VD5; Its battery E positive terminal links to each other with an end of diode VD1 negative pole, resistor R 2, resistor R 3, resistor R 5, resistor R 9, resistor R 11 respectively through switch S; Battery E negative pole end is connected with diode VD2 positive pole, triode VT3 emitter, triode VT4 emitter, triode VT5 emitter, triode VT7 emitter, resistor R 7 one ends respectively; Level detecting probe G links to each other with resistor R 1 one ends, and the positive pole of resistor R 1 other end and diode VD1, the negative pole of diode VD2, the base stage of triode VT1, the emitter of triode VT2 are connected; Green LED VD3 is connected on the collector circuit of triode VT4, and its positive and negative electrode is connected with resistor R 5, triode VT4 collector respectively; Red light emitting diodes VD4 and resistance R 8 parallel connections; Yellow light-emitting diode VD5 is connected between triode VT6 emitter and the triode VT7 collector, and yellow light emitting diode VD5 positive pole is connected with triode VT6 emitter, yellow light-emitting diode VD5 negative pole is connected with triode VT7 collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200468323U CN202421298U (en) | 2012-02-14 | 2012-02-14 | Potential detector for electronic circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200468323U CN202421298U (en) | 2012-02-14 | 2012-02-14 | Potential detector for electronic circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421298U true CN202421298U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200468323U Expired - Fee Related CN202421298U (en) | 2012-02-14 | 2012-02-14 | Potential detector for electronic circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202421298U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850141A (en) * | 2019-09-30 | 2020-02-28 | 深圳市元征科技股份有限公司 | Level display method, level display device, terminal equipment and storage medium |
-
2012
- 2012-02-14 CN CN2012200468323U patent/CN202421298U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850141A (en) * | 2019-09-30 | 2020-02-28 | 深圳市元征科技股份有限公司 | Level display method, level display device, terminal equipment and storage medium |
| CN110850141B (en) * | 2019-09-30 | 2022-02-22 | 深圳市元征科技股份有限公司 | Level display method, level display device, terminal equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20130214 |