CN217385635U - Single lamp test pencil circuit and test pencil - Google Patents
Single lamp test pencil circuit and test pencil Download PDFInfo
- Publication number
- CN217385635U CN217385635U CN202221236122.7U CN202221236122U CN217385635U CN 217385635 U CN217385635 U CN 217385635U CN 202221236122 U CN202221236122 U CN 202221236122U CN 217385635 U CN217385635 U CN 217385635U
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- China
- Prior art keywords
- triode
- circuit
- resistor
- test pencil
- emitting diode
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 239000000523 sample Substances 0.000 claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 230000005611 electricity Effects 0.000 description 5
- 229910052754 neon Inorganic materials 0.000 description 4
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- -1 silver make Chemical class 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a single lamp test pencil circuit and test pencil, which comprises a probe, the electric circuit, resistance R1, the negative pole contact and be used for the battery of power supply, be equipped with resistance R2 on the electric circuit, triode Q4, triode Q3 and emitting diode, resistance R1 one end and probe connection, the other end is connected with resistance R2, resistance R2's the other end is connected with triode Q4's base, triode Q4's collecting electrode is connected with triode Q3's base, emitting diode's positive pole and battery are connected with emitting diode's negative pole and triode Q3's projecting pole are connected, triode Q4's projecting pole and triode Q3's collecting electrode are connected with the battery negative pole, voltage clamping resistance has been cancelled, make the circuit can survey the induced voltage of wideer scope, thereby alternating current and direct current can be distinguished, and the circuit is retrencied, the cost is also lower.
Description
Technical Field
The utility model relates to an electrician's instrument technical field, in particular to single lamp test pencil circuit and test pencil.
Background
The test pencil is an electrician tool which is frequently used in daily life and work, and the general test pencil is provided with a pencil-shaped shell, wherein a pencil point is arranged at one end of the shell, and a resistor, a neon bulb, a spring and the like are connected in series in the shell. The neon tube can be used for judging a zero line and a live wire in a household lighting circuit and also can be used for judging whether a household appliance has an electric leakage phenomenon or not. However, the test pencil can only measure alternating current, but cannot measure direct current. Meanwhile, if the external light is too strong, the observation of the lightening of the neon tube is influenced, and an operator cannot clearly see whether the neon tube is lightened or not.
In the prior art, a patent in the disclosure of the invention of China is '202111302783.5', and the patent name is: an alternating current and direct current dual-purpose test pencil comprises a pencil-shaped shell, wherein one end of the shell is provided with a cutter bar pen point used for touching a tested object, the other end of the shell is embedded with a negative electrode touch point, a circuit board is arranged inside the shell, a battery used for supplying power is connected between the circuit board and the negative electrode touch point, the circuit board is provided with a voltage reduction resistor R1, the circuit board is divided into two paths through a voltage reduction resistor R1, one path is connected with a high-resistance resistor R2 and then connected with a voltage stabilizing diode ZD, the voltage stabilizing diode ZD is then connected with a base electrode B of an NPN type triode Q1, a collector electrode C of the triode Q1 is then connected with a negative electrode of a light emitting diode LED1, the positive electrode of the light emitting diode LED1 is then connected with a positive electrode of the battery, and the negative electrode of the battery is then connected with an emitter electrode E of an NPN type triode Q1 to form a loop; the other path is connected with a low-resistance resistor R3 and then connected with a base B of a PNP type triode Q2, a collector C of the triode Q2 is connected with an anode of a light emitting diode LEDG, a cathode of the light emitting diode LEDG is connected with a cathode of a battery, and an anode of the battery is connected with an emitter E of the PNP type triode Q2 to form another loop.
Disclosure of Invention
The utility model aims at: in order to overcome prior art's defect, the utility model provides a single lamp test pencil circuit has cancelled voltage clamping resistance for the induced voltage of wider scope can be surveyed to the circuit, thereby alternating current and direct current can be distinguished, and the circuit is retrencied, the cost is also lower.
The utility model discloses a single lamp test pencil circuit, including the probe that is used for the received signal, be used for detecting AC/DC circuit's electric circuit, be used for the step-down and with signal transmission after the step-down resistance R1, negative pole contact and be used for the battery of power supply in the electric circuit, its characterized in that: the electric loop is provided with a triode Q4, a triode Q3 and a light-emitting diode, one end of a resistor R1 is electrically connected with the probe, the other end of the resistor R1 is electrically connected with the base electrode of the triode Q4, the collector electrode of the triode Q4 is electrically connected with the base electrode of the triode Q3, the positive electrode of the light-emitting diode is connected with the positive electrode of the battery, the negative electrode of the light-emitting diode is electrically connected with the emitter electrode of the triode Q3, and the emitter electrode of the triode Q4 and the collector electrode of the triode Q3 are both electrically connected with the negative electrode of the battery.
The utility model discloses a further setting again: the resistance of the resistor R1 is 2 megaohms-10 megaohms.
The utility model discloses a further setting again: the circuit is also provided with a resistor R2, a resistor R2 is connected with the resistor R1 in series, and the resistance value of the resistor R2 is 12K ohm-220K ohm.
By adopting the technical scheme, when the anode of a certain direct current power supply is detected, the probe of the test pencil is lapped on the anode of the power supply, the contact of the cathode is propped against by hand, the current passes through the resistor R1, then passes through the resistor R2, then passes through the triode Q4, and then passes through the triode Q3 for current amplification, so as to form a loop with the light-emitting diode, and at the moment, the light-emitting diode is lighted;
when the live wire of an alternating current power supply needs to be detected, the test pencil probe is lapped on the live wire end of the power supply, the fingers of a detector prop against the negative contact of the test pencil, the current passes through the resistor R1, the resistor R2, the triode Q4 and the triode Q3 to be amplified, and forms a loop with the light-emitting diode, and at the moment, the light-emitting diode is lighted;
when the zero line of a certain alternating current power supply is detected, the probe of the electroprobe is lapped on the zero line end of the power supply, the fingers of a detector are propped against a negative contact of the electroprobe, an induced voltage is generated near the alternating current due to a voltage difference, and at the moment, no voltage clamping resistor is added to a base electrode of Q4 in the circuit, so that a weak current passes through a triode Q4 and then passes through a triode Q3 to form a loop with a light-emitting diode, and the light-emitting diode is slightly bright, so that the power supply is judged to be the zero line of the alternating current;
when the zero line of a certain direct current power supply needs to be detected, the probe of the test pencil is lapped on the zero line end of the power supply, the fingers of a detection person abut against the negative contact of the test pencil, the zero line is equal to the ground wire, no current flows without the pressure difference Q4, therefore, the Q4 is in a cut-off state, the triode Q3 and the light-emitting diode cannot form a loop, and the light-emitting diode is not lighted, so that the zero line is judged to be the direct current zero line.
The voltage clamping resistor is eliminated, so that the circuit can measure the induction voltage in a wider range, the red lamp can start to be slightly lightened when the probe is close to the alternating current live wire, the closer the distance is, the higher the brightness is, and the direct current positive electrode can be lightened when the probe is in complete contact, so that the alternating current live wire and the direct current positive electrode can be judged more visually;
and the resistance value of the resistor R1 can be finely adjusted by using the resistor R2, so that the adjustment of the resistance value is facilitated.
The utility model discloses a further setting: the light emitting diode adopts a red light emitting diode.
By adopting the technical scheme, the red light is bright, so that the red light can be easily observed when detecting the alternating current.
The utility model discloses a different purpose discloses a test pencil, including the circuit board, probe, electric circuit, resistance R1 and negative pole contact all set up on the circuit board, its characterized in that: the probe is provided with a trumpet-shaped metal contact piece, and the metal contact piece is most preferably made of copper or iron.
By adopting the technical scheme, the metal contact sheet is in a horn shape, so that the metal contact sheet has a better effect in detection, and is made of copper or iron, so that the cost is lower, and the cost performance is higher.
Drawings
FIG. 1 is a circuit diagram of the present invention;
fig. 2 is a schematic diagram of the structure on the circuit board of the test pencil of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
example 1:
the utility model discloses a single lamp test pencil circuit, including probe 1 that is used for the received signal, be used for detecting the electric return circuit of crossing DC circuit, be used for the step-down and with signal transmission after the step-down resistance R1 on the electric return circuit, negative pole contact 2 and be used for the battery 3 of power supply, the utility model discloses in the implementation case, be equipped with triode Q4 on the electric return circuit, triode Q3 and emitting diode 4, resistance R1 one end is connected with probe 1 electricity, the resistance R1 other end is connected with triode Q4's base electricity, triode Q4's collecting electrode is connected with triode Q3's base electricity, emitting diode 354's positive pole and battery positive pole are connected, emitting diode 4's negative pole and triode Q3's projecting pole electricity are connected, triode Q4's projecting pole and triode Q3's collecting electrode all with battery negative pole electricity connection.
The resistance of the resistor R1 is 2 megaohms-10 megaohms.
The circuit is also provided with a resistor R2, a resistor R2 is connected with the resistor R1 in series, and the resistance value of the resistor R2 is 12K ohm-220K ohm.
By adopting the technical scheme, when the anode of a certain direct current power supply needs to be detected, the probe 1 of the electroprobe is placed on the anode of the power supply, the negative contact 2 is propped against by hands, the current passes through the resistor R1, then through the resistor R2, then through the triode Q4, and then through the triode Q3, the current is amplified to form a loop with the light-emitting diode 4, and at the moment, the light-emitting diode 4 is on;
when the live wire of an alternating current power supply needs to be detected, the test pencil probe 1 is lapped on the live wire end of the power supply, the fingers of a detector abut against the negative contact 2 of the test pencil, the current passes through the resistor R1, the resistor R2, the triode Q4 and the triode Q3 to be amplified, a loop is formed with the light-emitting diode 4, and at the moment, the light-emitting diode 4 is lighted;
when the zero line of a certain alternating current power supply is detected, the probe 1 of the electroprobe is put on the zero line end of the power supply, the fingers of a detector prop against the negative contact 2 of the electroprobe, induced voltage is generated near alternating current due to voltage difference, at the moment, no voltage clamping resistor is added to a base electrode of Q4 in the circuit, so that weak current passes through a triode Q4 and then forms a loop with a light-emitting diode through a triode Q3, and the light-emitting diode 4 is slightly bright, so that the power supply is judged to be the zero line of the alternating current;
when the zero line of a certain direct current power supply needs to be detected, the test pencil probe 1 is put on the zero line end of the power supply, the fingers of a detector abut against the negative electrode contact 2 of the test pencil, the zero line is equal to the ground wire, no current flows through the zero line without the pressure difference Q4, therefore, the Q4 is in a cut-off state, the triode Q3 and the light-emitting diode cannot form a loop, and the light-emitting diode 4 is not lighted, so that the direct current zero line is judged.
A voltage clamping resistor is eliminated, so that the circuit can measure induction voltage in a wider range, the red lamp can start to be slightly lightened when the probe 1 is close to the alternating current live wire, the closer the distance, the higher the brightness is, and the direct current positive electrode can be lightened when the probe is in complete contact, so that the alternating current live wire and the direct current positive electrode can be judged more visually;
and the resistance value of the resistor R1 can be finely adjusted by using the resistor R2, so that the adjustment of the resistance value is facilitated.
The light-emitting diode 4 adopts a red light-emitting diode, and the red light is bright, so that the red light is easy to observe when detecting alternating current.
Example 2:
the utility model discloses a test pencil, including circuit board 1 ', probe 2', electric loop, resistance R1, resistance R2 and negative pole contact all set up on circuit board 1 ', in the embodiment, be equipped with the metallic contact piece 3' that is the loudspeaker form on its probe 2 ', metallic contact piece 3' most preferably adopts copper or iron to make, and metallic contact piece 3 'presents the loudspeaker form and can make its effect when surveying better to adopt copper or iron to make the cost ratio lower, the price/performance ratio is than higher, and metallic contact piece 3' can also adopt aluminium certainly, metals such as silver make, and its cost is than higher, nevertheless can increase the detection effect.
Claims (6)
1. A single lamp test pencil circuit comprises a probe for receiving a signal, an electric loop for detecting an alternating current-direct current circuit, a resistor R1 for reducing voltage and transmitting the reduced voltage signal to the electric loop, a negative contact and a battery for supplying power, and is characterized in that: the electric loop is provided with a triode Q4, a triode Q3 and a light-emitting diode, one end of a resistor R1 is electrically connected with the probe, the other end of the resistor R1 is electrically connected with the base electrode of the triode Q4, the collector electrode of the triode Q4 is electrically connected with the base electrode of the triode Q3, the positive electrode of the light-emitting diode is connected with the positive electrode of the battery, the negative electrode of the light-emitting diode is electrically connected with the emitter electrode of the triode Q3, and the emitter electrode of the triode Q4 and the collector electrode of the triode Q3 are both electrically connected with the negative electrode of the battery.
2. The single lamp test pencil circuit of claim 1, wherein: the circuit is also provided with a resistor R2, a resistor R2 is connected with the resistor R1 in series, and the resistance value of the resistor R2 is 12K ohm-220K ohm.
3. A single lamp test pencil circuit according to claim 1 or 2, wherein: the resistance of the resistor R1 is 2 megaohms-10 megaohms.
4. A single lamp test pencil circuit according to claim 3, wherein: the light emitting diode adopts a red light emitting diode.
5. A test pencil using the single lamp test pencil circuit of any one of claims 1-4, comprising a circuit board, wherein the probe, the circuit loop, the resistor R1 and the negative contact are all disposed on the circuit board, and the test pencil is characterized in that: the probe is also provided with a trumpet-shaped metal contact piece.
6. The test pencil of claim 5, wherein: the metal contact piece is made of metal copper or metal iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221236122.7U CN217385635U (en) | 2022-05-20 | 2022-05-20 | Single lamp test pencil circuit and test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221236122.7U CN217385635U (en) | 2022-05-20 | 2022-05-20 | Single lamp test pencil circuit and test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217385635U true CN217385635U (en) | 2022-09-06 |
Family
ID=83088417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221236122.7U Active CN217385635U (en) | 2022-05-20 | 2022-05-20 | Single lamp test pencil circuit and test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217385635U (en) |
-
2022
- 2022-05-20 CN CN202221236122.7U patent/CN217385635U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 101 Quren Road, Quxi Street, Ouhai District, Wenzhou City, Zhejiang Province, 325000 Patentee after: WENZHOU OUJIE ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 325000 No. 492, Julong East Road, Quxi street, Ouhai District, Wenzhou City, Zhejiang Province (floors 3-4, building 1) Patentee before: WENZHOU OUJIE ELECTRONIC TECHNOLOGY Co.,Ltd. |