CN201000685Y - DC current direction demonstration instrument - Google Patents
DC current direction demonstration instrument Download PDFInfo
- Publication number
- CN201000685Y CN201000685Y CNU2007200170506U CN200720017050U CN201000685Y CN 201000685 Y CN201000685 Y CN 201000685Y CN U2007200170506 U CNU2007200170506 U CN U2007200170506U CN 200720017050 U CN200720017050 U CN 200720017050U CN 201000685 Y CN201000685 Y CN 201000685Y
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Abstract
The utility model relates to a direct current direction demonstration device, which is used to demonstrate the direct current direction in the junior high school physics teaching. The utility model comprises a demonstration device casing, a demonstration panel is arranged at the front part of the demonstration device casing, and a group A group B and group C light-emitting diodes are arranged on the demonstration panel, and each group light-emitting diodes are crossly arranged on the demonstration panel in order; a power positive binding post, a power negative binding post and a switch are arranged on the demonstration panel; a battery case is arranged between the power positive binding post and the power negative binding post, a battery is put in the battery case, the positive pole of the battery is connected with the power positive binding post, and the negative pole of the battery is connected with the power negative binding post; a light-emitting diodes delaying drive circuit is equipped in the demonstration device casing, the light-emitting diodes delaying drive circuit is connected with the group A group B and group C light-emitting diodes, the power negative binding post, the power negative binding post and the switch arranged on the demonstration panel. The structure of the utility model is simple, the cost is inexpensive, the operation is easy, the demonstration is vivid, and the pattern is visual.
Description
Technical field
The utility model relates to a kind of teaching demonstration instrument that can demonstrate the DC current direction, relates in particular to a kind of DC current direction demonstrator.
Background technology
In the junior middle school physics teaching, for electric current and this class of circuit, teacher can only the word picture sense of current be to flow to negative pole from positive pole in the outside of power supply, and is not vivid, not directly perceived.
Summary of the invention
The purpose of this utility model provides a kind of DC current direction demonstrator that can simulate galvanic flow direction intuitively.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of DC current direction demonstrator, comprise the demonstrator housing, the front of demonstrator housing is the demonstration panel, it is characterized in that: the demonstration panel is provided with A group, B group, C and organize light emitting diode, light emitting diode of A group, B group, each group of C group press A, B, C in proper order cross arrangement demonstrating on the panel; The demonstration panel is provided with positive source binding post and power cathode binding post and switch; Be provided with battery case between positive source binding post and the power cathode binding post, battery is housed in the battery case, the positive pole of battery is connected with the positive source binding post, and the negative pole of battery is connected with the power cathode binding post; Light emitting diode is installed in the demonstrator housing postpones driving circuit, the A group on light emitting diode postpones driving circuit and demonstrates panel, B group, each light emitting diode of organizing of C group are connected with power cathode binding post and switch with the positive source binding post.
The utility model utilizes the diode forward conducting, oppositely ends this unilateal conduction characteristic, and external light emitting diode postpones driving circuit, is controlling light emitting diode conducting successively in certain sequence, thereby is simulating galvanic flow direction.The used element of circuit seldom as long as welding is errorless, gets final product operate as normal in the utility model after the energising, need not debugging.Simple in structure, cheap, principle is clear, and is easy and simple to handle, and demonstration is lively, and is visual in image.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
In the accompanying drawing: 1, switch; 2, light emitting diode; 3, demonstration panel; 4 bulbs; 5, power cathode binding post; 6, battery case; 7, battery; 8, positive source binding post.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
The utility model as shown in Figure 1, comprise the demonstrator housing, the front of demonstrator housing is demonstration panel 3, and demonstration panel 3 is provided with A group, B group, C and organize light emitting diode, light emitting diode of A group, B group, each group of C group press A, B, C in proper order cross arrangement demonstrating on the panel 3; Demonstration panel 3 is provided with positive source binding post 8 and power cathode binding post 5 and switch 1; Be provided with battery case 6 between positive source binding post 8 and the power cathode binding post 5, battery 7 is housed in the battery case 6, the positive pole of battery is connected with the positive source binding post, and the negative pole of battery is connected with the power cathode binding post; Light emitting diode is installed in the demonstrator housing postpones driving circuit, the A group on light emitting diode postpones driving circuit and demonstrates panel, B group, each light emitting diode of organizing of C group are connected with power cathode binding post 5 and switch 1 with positive source binding post 8.
Circuit working principle of the present utility model is as shown in Figure 2: after the energized, capacitor C 1 begins charging.When the voltage on the capacitor C 1 surpassed 0.6V, triode BG1 began to lead, and the C electrode potential reduces, light A group light emitting diode, simultaneously by diode D1, D2, had dragged down the voltage of triode BG2, BG3 base stage, caused BG2, not conducting of BG3.In the moment that capacitor C 1 discharge off triode BG1 ends, capacitor C 2 current potentials rise, when voltage is higher than 0.6V, triode BG2 conducting, the C electrode potential descends, and B group light emitting diode is lighted, by diode D3, dragged down the current potential of triode BG3 base stage simultaneously, triode BG3 can't conducting.When capacitor C 2 discharge offs, when triode BG2 ended, the anodal current potential of capacitor C 3 rose, and when voltage was higher than 0.6V, triode BG3 began conducting, and C group light emitting diode is lighted.Capacitor C 3 discharge offs after triode BG3 ends, enter the conducting in turn of subordinate phase, move in circles.Light emitting diode is lighted from left to right successively in turn, makes people's vision feel that electric current from left to right promptly slowly flows from the positive pole to the negative pole.So just the direction image of abstract DC current, be presented in face of the student intuitively.
Claims (1)
1, a kind of DC current direction demonstrator, comprise the demonstrator housing, the front of demonstrator housing is demonstration panel (3), it is characterized in that: demonstration panel (3) is provided with A group, B group, C and organize light emitting diode, light emitting diode of A group, B group, each group of C group press A, B, C in proper order cross arrangement demonstrating on the panel (3); Demonstration panel (3) is provided with positive source binding post (8) and power cathode binding post (5) and switch (1); Be provided with battery case (6) between positive source binding post (8) and the power cathode binding post (5), battery (7) is housed in the battery case (6), the positive pole of battery is connected with positive source binding post (8), and the negative pole of battery is connected with power cathode binding post (5); Light emitting diode is installed in the demonstrator housing postpones driving circuit, the A group on light emitting diode postpones driving circuit and demonstrates panel, B group, each light emitting diode of organizing of C group are connected with power cathode binding post (5) and switch (1) with positive source binding post (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200170506U CN201000685Y (en) | 2007-01-01 | 2007-01-01 | DC current direction demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200170506U CN201000685Y (en) | 2007-01-01 | 2007-01-01 | DC current direction demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201000685Y true CN201000685Y (en) | 2008-01-02 |
Family
ID=39015089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200170506U Expired - Fee Related CN201000685Y (en) | 2007-01-01 | 2007-01-01 | DC current direction demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201000685Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109118910A (en) * | 2018-09-07 | 2019-01-01 | 华南理工大学广州学院 | A kind of DC current direction detection device |
-
2007
- 2007-01-01 CN CNU2007200170506U patent/CN201000685Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109118910A (en) * | 2018-09-07 | 2019-01-01 | 华南理工大学广州学院 | A kind of DC current direction detection device |
| CN109118910B (en) * | 2018-09-07 | 2020-12-15 | 华南理工大学广州学院 | Direct current direction detection device |
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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 |