CN2439701Y - Instrument for testing circuit experiment - Google Patents
Instrument for testing circuit experiment Download PDFInfo
- Publication number
- CN2439701Y CN2439701Y CN 00221877 CN00221877U CN2439701Y CN 2439701 Y CN2439701 Y CN 2439701Y CN 00221877 CN00221877 CN 00221877 CN 00221877 U CN00221877 U CN 00221877U CN 2439701 Y CN2439701 Y CN 2439701Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- transistor switching
- sound
- sound generating
- switching circuit
- 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
- 230000005669 field effect Effects 0.000 claims description 7
- 230000005684 electric field Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005686 electrostatic field Effects 0.000 abstract description 2
- 230000005236 sound signal Effects 0.000 abstract description 2
- 230000005685 electric field effect Effects 0.000 abstract 2
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
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- Electrically Operated Instructional Devices (AREA)
Abstract
The utility model discloses an instrument for testing a circuit experiment. A casing is provided with a through hole of an electric field effect sensor, and the electric field effect sensor is penetrated into the through hole and is connected with the input end of a transistor switching circuit. The transistor switching circuit is connected with the input end of a sound generating circuit. The output end of the sound generating circuit is connected with an audio signal amplifying circuit. Power is connected with the transistor switching circuit, and the sound generating circuit. The utility model can be used for synthetically demonstrating an electrostatic field and an AC electric field through sound, light, and sound, the effect of the experiment is visual and imaginal, the learning interests of students can be excited effectively, and the teaching effect can be improved.
Description
The utility model relates to a kind of Teaching aid for electricity, is a kind of teaching aid that detects electric field.
In the teaching of existing electricity, for friction produces electricity, the demonstration of phenomenons such as electric field around the electric current, still adopt classic method, its image, intuitive are not ideal enough.
The purpose of this utility model be to provide a kind of can be intuitively, the Experiment of Electrical Circuits detector of image demonstration electric field.
Technical solution of the present utility model is:
A kind of Experiment of Electrical Circuits detector, the difference of itself and prior art is: comprise housing, have the perforation of field effect sensor on the housing, the field effect sensor is installed in this hole, and be connected with the input end of transistor switching circuit, the output terminal of transistor switching circuit is connected with the input end of sound generating circuit, and the output terminal of sound generating circuit is connected with amplifier circuit for sound frequency signal, and power supply is connected with aforementioned each circuit.
The utility model is by sound, light and speech synthesis demonstration electrostatic field and AC field, and it is correct etc. whether quick checking student experimenting lighting circuit connects safety, and its experiment effect is directly perceived, vivid, can effectively excite student's learning interest, improves teaching efficiency.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the configuration diagram of an embodiment of the utility model.
Fig. 2 is the circuit block diagram of Fig. 1 embodiment.
Fig. 3 is the circuit diagram of figure Fig. 1 embodiment.
A kind of Experiment of Electrical Circuits detector, comprise housing 6, have field effect sensor perforation 7 on the housing 6, field effect sensor 1 is installed in this hole 7, and be connected with the input end of transistor switching circuit 2, the output terminal of transistor switching circuit 2 is connected with the input end of sound generating circuit 3, and the output terminal of sound generating circuit 3 is connected with amplifier circuit for sound frequency signal 4, and power supply 5 is connected with aforementioned each circuit.
Field effect sensor 1 is connected and composed by sensing chip 9, fet BG1 and resistance R 1, R2 among Fig. 3.Transistor switching circuit 2 is made of triode BG2 and the emitter resistance R3 that is attached thereto.Sound generating circuit 3 is by integrated IC1 of voice (HFC5219) and music integrated chip IC2 (KD128) and connects and form that be connected to switch K2 between the trigger electrode (TG) of IC1 and IC2, the emitter of the BG2 in the transistor switching circuit 2 is connected with K2.
Sound signal generation circuit 4 is done amplifier element by compound transistor BG3, BG4, and loudspeaker 8 (YDT) and LED 1 are attempted by on the collector of BG4, and the output terminal that two sound equipments in the base stage of BG3 and the sound generating circuit 3 are integrated links to each other.Power supply is selected 2 joint dry cells for use, be connected in series K switch 1 again, filter capacitor C2 is attempted by the two ends of power supply and K1, and LED 2 is indicated as power supply, base stage and inter-collector at the triode BG2 of transistor switching circuit 2 also are connected with K switch 3, as the usefulness of self-check of device.
Claims (1)
1, a kind of Experiment of Electrical Circuits detector, it is characterized in that: comprise housing, have the perforation of field effect sensor on the housing, the field effect sensor is installed in this hole, and be connected with the input end of transistor switching circuit, the output terminal of transistor switching circuit is connected with the input end of sound generating circuit, and the output terminal of sound generating circuit is connected with amplifier circuit for sound frequency signal, and power supply is connected with aforementioned each circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221877 CN2439701Y (en) | 2000-09-22 | 2000-09-22 | Instrument for testing circuit experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00221877 CN2439701Y (en) | 2000-09-22 | 2000-09-22 | Instrument for testing circuit experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2439701Y true CN2439701Y (en) | 2001-07-18 |
Family
ID=33586709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00221877 Expired - Fee Related CN2439701Y (en) | 2000-09-22 | 2000-09-22 | Instrument for testing circuit experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2439701Y (en) |
-
2000
- 2000-09-22 CN CN 00221877 patent/CN2439701Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |