CN202815070U - Multifunctional LED test pencil - Google Patents
Multifunctional LED test pencil Download PDFInfo
- Publication number
- CN202815070U CN202815070U CN 201220402125 CN201220402125U CN202815070U CN 202815070 U CN202815070 U CN 202815070U CN 201220402125 CN201220402125 CN 201220402125 CN 201220402125 U CN201220402125 U CN 201220402125U CN 202815070 U CN202815070 U CN 202815070U
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- amplifying triode
- electrode
- test pencil
- emitting diode
- battery
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Abstract
The utility model discloses a multifunctional LED test pencil, which comprises a detecting electrode, a hand touch electrode, a current limiting resistor, a battery, a light-emitting diode, a first amplifying triode and a second amplifying triode, wherein an inner end of the detecting electrode is connected with one end of the current limiting resistor, the other end of the current limiting resistor is connected with the first amplifying triode, a collector electrode of the first amplifying triode is connected with the a positive electrode of the light-emitting diode, a positive electrode of the battery and an inner end of the hand touch electrode simultaneously, an emitting electrode of the first amplifying triode is connected with a base electrode of the second amplifying triode, a collector electrode of the second amplifying triode is connected with a negative electrode of the light-emitting diode, and an emitting electrode of the second amplifying triode is connected with a negative electrode of the battery. The multifunctional LED test pencil disclosed by the utility model is simple in manufacture, low in cost, and strong in practicability, the emitting light can be seen clearly when the test pencil is used indoor or outdoor, the sensitivity is high, actual voltage and induction voltage can be detected, and the objective of multifunctional measurement is realized.
Description
Technical field
The utility model relates to a kind of test pencil, relates in particular to a kind of Multifunctional LED test pencil.
Background technology
The tradition test pencil is the neon tube test pencil, have volume small and exquisite, easy to carry, use simple advantage, but the neon bulb luminosity of traditional neon tube test pencil is inadequate, is difficult to see clearly the neon bulb light on and off when measuring light current or use under high light, cause use limited; In addition, because the amplification of the electric current in traditional neon tube test pencil is limited, so be difficult to measure induced voltage.
Summary of the invention
The purpose of this utility model just is to provide in order to address the above problem a kind of highly sensitive, the Multifunctional LED test pencil that can measure virtual voltage and induced voltage.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises the detection utmost point, hand touches the utmost point, current-limiting resistance, battery, light emitting diode, the first amplifying triode and the second amplifying triode, the inner of the described detection utmost point is connected with an end of described current-limiting resistance, the other end of described current-limiting resistance is connected with described the first amplifying triode, the collector while of described the first amplifying triode and the positive pole of described light emitting diode, the positive pole of described battery be connected the inner that hand touches the utmost point and connect, the emitter of described the first amplifying triode is connected with the base stage of described the second amplifying triode, the collector of described the second amplifying triode is connected with the negative pole of described light emitting diode, and the emitter of described the second amplifying triode is connected with the negative pole of described battery.
Particularly, described the first amplifying triode and described the second amplifying triode are NPN type triode.
Described light emitting diode is red light emitting diodes.
Described battery is in series by the button cell of two 1.5V.
The beneficial effects of the utility model are:
The utility model is made simple, and cost is lower, and is practical, and use the indoor and outdoor all can see light-emitting line clearly, highly sensitive, can detect virtual voltage and induced voltage, has realized the purpose of multifunctional measuring.
Description of drawings
Fig. 1 is the circuit diagram of Multifunctional LED test pencil described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model comprises the detection utmost point, hand touches the utmost point, current-limiting resistance R, battery E, light emitting diode VD, the first amplifying triode VT1 and the second amplifying triode VT2, the inner of surveying the utmost point is connected with the end of current-limiting resistance R, the other end of current-limiting resistance R is connected with the first amplifying triode VT1's, the collector while of the first amplifying triode VT1 and the positive pole of light emitting diode VD, the positive pole of battery E is connected the utmost point with hand the inner connects, the emitter of the first amplifying triode VT1 is connected with the base stage of the second amplifying triode VT2, the collector of the second amplifying triode VT2 is connected with the negative pole of light emitting diode VD, and the emitter of the second amplifying triode VT2 is connected with the negative pole of battery E.
The first amplifying triode VT1 and the second amplifying triode VT2 are NPN type triode; Light emitting diode VD is red light emitting diodes; Battery E is in series by the button cell of two 1.5V.
As shown in Figure 1,
The utlity model has following various function:
1, by testing oneself, judges whether the utility model is working properly: go respectively contact to survey the utmost point and the tactile utmost point of hand with two hands, represent that the utility model is working properly if light emitting diode VD is bright.
2, detect the break-make of the coils such as inductor, voltage device: the finger contact hand of a hand touches the utmost point, remove to contact an end of the coils such as inductor, transformer with the detection utmost point, the another hand pinches the other end of coil, if light emitting diode VD is bright, illustrate that coil leads to, otherwise obstructed.
3, judge the polarity of crystal diode: an end that directly pinches crystal diode with hand, the another hand contacts hand of the present utility model and touches the utmost point, and simultaneously with the other end of surveying utmost point contact crystal diode, if light emitting diode VD is luminous, illustrate that hand pinches the positive pole that an end is crystal diode, an end that contacts the detection utmost point of the present utility model is the negative pole of crystal diode, otherwise situation is opposite.
Inductive method is measured the 220V alternating current: touch wire insulation crust or electrical-appliance plastic shell as long as will survey the utmost point, whether the light on and off of observation light emitting diode VD, tells phase line and zero line and whether charged.Utilize this feature also can find out lacking in the live wire across plastic peel and put a position.
Claims (4)
1. Multifunctional LED test pencil, comprise the detection utmost point, hand touches the utmost point and current-limiting resistance, it is characterized in that: also comprise battery, light emitting diode, the first amplifying triode and the second amplifying triode, the inner of the described detection utmost point is connected with an end of described current-limiting resistance, the other end of described current-limiting resistance is connected with described the first amplifying triode, the collector while of described the first amplifying triode and the positive pole of described light emitting diode, the positive pole of described battery be connected the inner that hand touches the utmost point and connect, the emitter of described the first amplifying triode is connected with the base stage of described the second amplifying triode, the collector of described the second amplifying triode is connected with the negative pole of described light emitting diode, and the emitter of described the second amplifying triode is connected with the negative pole of described battery.
2. Multifunctional LED test pencil according to claim 1, it is characterized in that: described the first amplifying triode and described the second amplifying triode are NPN type triode.
3. Multifunctional LED test pencil according to claim 1, it is characterized in that: described light emitting diode is red light emitting diodes.
4. Multifunctional LED test pencil according to claim 1, it is characterized in that: described battery is in series by the button cell of two 1.5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402125 CN202815070U (en) | 2012-08-15 | 2012-08-15 | Multifunctional LED test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402125 CN202815070U (en) | 2012-08-15 | 2012-08-15 | Multifunctional LED test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202815070U true CN202815070U (en) | 2013-03-20 |
Family
ID=47873928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220402125 Expired - Fee Related CN202815070U (en) | 2012-08-15 | 2012-08-15 | Multifunctional LED test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202815070U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336167A (en) * | 2013-05-22 | 2013-10-02 | 国家电网公司 | AC-DC test pen |
-
2012
- 2012-08-15 CN CN 201220402125 patent/CN202815070U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336167A (en) * | 2013-05-22 | 2013-10-02 | 国家电网公司 | AC-DC test pen |
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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: 20130320 Termination date: 20130815 |