CN205177252U - Electric laboratory teaching pulse generator of colleges and universities - Google Patents
Electric laboratory teaching pulse generator of colleges and universities Download PDFInfo
- Publication number
- CN205177252U CN205177252U CN201520960291.9U CN201520960291U CN205177252U CN 205177252 U CN205177252 U CN 205177252U CN 201520960291 U CN201520960291 U CN 201520960291U CN 205177252 U CN205177252 U CN 205177252U
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Abstract
The utility model discloses an electric laboratory teaching pulse generator of colleges and universities, including time base chip U1, resistance R1, electric capacity C1, diode VD1, emitting diode LED1 and triode VT1, resistance R1 one end is connecting resistance R3 respectively, time base chip U1 pin 8 and power VCC, the resistance R1 other end is connecting resistance R2 and time base chip U1 pin 7 respectively, time base chip U1 pin 2 is connected respectively to the resistance R2 other end, time base chip U1 pin 6 and electric capacity C1, time base chip U1 pin 1 is connected respectively to the electric capacity C1 other end, electric capacity C2, electric capacity C4 and resistance R6, time base chip U1 pin 5 is connected to the electric capacity C2 other end, the electric capacity C4 other end is connecting resistance R4 and diode VD1 positive pole respectively, time base chip U1 pin 3 is connected to the resistance R4 other end. The utility model discloses electric laboratory teaching pulse generator of colleges and universities circuit structure is simple, and is with low costs, small, and stability is high, the electric laboratory use of especially adapted colleges and universities.
Description
Technical field
The utility model relates to a kind of pulse power, specifically a kind of colleges and universities electrical laboratory teaching pulse power.
Background technology
Colleges and universities' electrical laboratory often can need to use the pulse power to observe the charge characteristic of various power supply, and existing a lot of pulse power price is all comparatively high, and volume is comparatively large, is not suitable for laboratory and uses.
Utility model content
The purpose of this utility model is to provide a kind of colleges and universities electrical laboratory teaching pulse power, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of colleges and universities electrical laboratory teaching pulse power, base chip U1 when comprising, resistance R1, electric capacity C1, diode VD1, LED 1 and triode VT1, described resistance R1 one end is contact resistance R3 respectively, time base chip U1 pin 8 and power supply VCC, the resistance R1 other end is contact resistance R2 and Shi Ji chip U1 pin 7 respectively, base chip U1 pin 2 when the resistance R2 other end connects respectively, time base chip U1 pin 6 and electric capacity C1, base chip U1 pin 1 when the electric capacity C1 other end connects respectively, electric capacity C2, electric capacity C4 and resistance R6, base chip U1 pin 5 when the electric capacity C2 other end connects, the electric capacity C4 other end is contact resistance R4 and diode VD1 positive pole respectively, base chip U1 pin 3 when the resistance R4 other end connects, diode VD1 negative pole connects output end vo respectively, resistance R5 and LED 2 negative pole, the LED 2 positive pole contact resistance R6 other end, the resistance R5 other end connects direct earth capacitance C3 and diode VDZ respectively, diode VDZ positive pole connecting triode VT1 base stage, triode VT1 grounded emitter, base chip U1 pin 4 and LED 1 negative pole when triode VT1 collector connects respectively, the LED 1 positive pole contact resistance R3 other end.
As further program of the utility model: time described, base chip U1 model is NE555.
As the utility model further scheme: described power supply VCC voltage is 5 ~ 15V.
Compared with prior art, the beneficial effects of the utility model are: the utility model colleges and universities electrical laboratory teaching pulse power supply circuit structure is simple, and cost is low, and volume is little, and stability is high, is applicable to very much colleges and universities' electrical laboratory and uses.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of colleges and universities' electrical laboratory teaching pulse power.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of colleges and universities electrical laboratory teaching pulse power, base chip U1 when comprising, resistance R1, electric capacity C1, diode VD1, LED 1 and triode VT1, described resistance R1 one end is contact resistance R3 respectively, time base chip U1 pin 8 and power supply VCC, the resistance R1 other end is contact resistance R2 and Shi Ji chip U1 pin 7 respectively, base chip U1 pin 2 when the resistance R2 other end connects respectively, time base chip U1 pin 6 and electric capacity C1, base chip U1 pin 1 when the electric capacity C1 other end connects respectively, electric capacity C2, electric capacity C4 and resistance R6, base chip U1 pin 5 when the electric capacity C2 other end connects, the electric capacity C4 other end is contact resistance R4 and diode VD1 positive pole respectively, base chip U1 pin 3 when the resistance R4 other end connects, diode VD1 negative pole connects output end vo respectively, resistance R5 and LED 2 negative pole, the LED 2 positive pole contact resistance R6 other end, the resistance R5 other end connects direct earth capacitance C3 and diode VDZ respectively, diode VDZ positive pole connecting triode VT1 base stage, triode VT1 grounded emitter, base chip U1 pin 4 and LED 1 negative pole when triode VT1 collector connects respectively, the LED 1 positive pole contact resistance R3 other end.
Time base chip U1 model be NE555.
Power supply VCC voltage is 5 ~ 15V.
Principle of work of the present utility model is: refer to Fig. 1, NE555 and R1, R2, C1 etc. form astable multivibrator, oscillation frequency is 100Hz, its dutycycle is close to 50%, the output of NE555 is through R4 current limliting, directly output current is provided after C4 filtering, current reflux when diode VD1 is for preventing output end vo from being cell load, VDZ is voltage stabilizing diode, after cell load underfill electricity, VDZ ends, VT1 saturation conduction, then 4 pin of NE555 are because making the vibration of circuit stop in low level, realize cell load and be full of the rear auto stop of electricity, simultaneously, LED1 is glittering, show to substitute the bad for the good, after the selection of VDZ should make its voltage stabilizing ratings add the 0.7V of the PN junction of VT1, the nominal value of a little higher than cell load, therefore, by selecting different power supplys (5 ~ 15V) and different voltage stabilizing diode VDZ, the requirement of different capabilities cell load can be met, LED2 is that cell load connects anti-pilot lamp, R5, C3 forms smoothed filter circuit.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. colleges and universities' electrical laboratory teaching pulse power, base chip U1 when comprising, resistance R1, electric capacity C1, diode VD1, LED 1 and triode VT1, it is characterized in that, described resistance R1 one end is contact resistance R3 respectively, time base chip U1 pin 8 and power supply VCC, the resistance R1 other end is contact resistance R2 and Shi Ji chip U1 pin 7 respectively, base chip U1 pin 2 when the resistance R2 other end connects respectively, time base chip U1 pin 6 and electric capacity C1, base chip U1 pin 1 when the electric capacity C1 other end connects respectively, electric capacity C2, electric capacity C4 and resistance R6, base chip U1 pin 5 when the electric capacity C2 other end connects, the electric capacity C4 other end is contact resistance R4 and diode VD1 positive pole respectively, base chip U1 pin 3 when the resistance R4 other end connects, diode VD1 negative pole connects output end vo respectively, resistance R5 and LED 2 negative pole, the LED 2 positive pole contact resistance R6 other end, the resistance R5 other end connects direct earth capacitance C3 and diode VDZ respectively, diode VDZ positive pole connecting triode VT1 base stage, triode VT1 grounded emitter, base chip U1 pin 4 and LED 1 negative pole when triode VT1 collector connects respectively, the LED 1 positive pole contact resistance R3 other end.
2. the colleges and universities according to claim 1 electrical laboratory teaching pulse power, it is characterized in that, time described, base chip U1 model is NE555.
3. the colleges and universities according to claim 1 electrical laboratory teaching pulse power, it is characterized in that, described power supply VCC voltage is 5 ~ 15V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520960291.9U CN205177252U (en) | 2015-11-27 | 2015-11-27 | Electric laboratory teaching pulse generator of colleges and universities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520960291.9U CN205177252U (en) | 2015-11-27 | 2015-11-27 | Electric laboratory teaching pulse generator of colleges and universities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205177252U true CN205177252U (en) | 2016-04-20 |
Family
ID=55741212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520960291.9U Expired - Fee Related CN205177252U (en) | 2015-11-27 | 2015-11-27 | Electric laboratory teaching pulse generator of colleges and universities |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205177252U (en) |
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2015
- 2015-11-27 CN CN201520960291.9U patent/CN205177252U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20171127 |