CN206211534U - A kind of reverse power connection protection device of Electronic-Lab - Google Patents
A kind of reverse power connection protection device of Electronic-Lab Download PDFInfo
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- CN206211534U CN206211534U CN201621122647.2U CN201621122647U CN206211534U CN 206211534 U CN206211534 U CN 206211534U CN 201621122647 U CN201621122647 U CN 201621122647U CN 206211534 U CN206211534 U CN 206211534U
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- triode
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- 230000005611 electricity Effects 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Abstract
The utility model is related to a kind of reverse power connection protection device of Electronic-Lab, belongs to electronic technology field.The utility model includes integrated operational amplifier, triode, 555 multi-resonant oscillating circuits, buzzer, LED light emitting diodes；After the integrated operational amplifier to input voltage by being compared, the working condition of output signal control triode T1, T2, T3 so as to control the electric power thus supplied of 555 multi-resonant oscillating circuits, and then controls LED lumination of light emitting diode and buzzer sounding.The utility model is by solving student when electronics road laboratory is tested, because misoperation is reversed power positive cathode, so as to the accident for causing electronic circuit to damage occurs, timely and effectively power positive cathode can be overturn, and student power source reverse polarity connection is pointed out by LED LED flash and buzzer sounding.
Description
Technical field
The utility model is related to a kind of reverse power connection protection device of Electronic-Lab, belongs to electronic technology field.
Background technology
At present, student is when Electronic-Lab is tested, because misoperation is reversed power positive cathode, and
Cause failure, electronic component heating or the situation about burning of circuit to happen occasionally, and then influence experiment progress, to laboratory
Certain economic loss is caused, and there is certain potential safety hazard.
The content of the invention
The technical problems to be solved in the utility model is：The utility model provides a kind of power supply of Electronic-Lab
Reverse protection device, by input supply voltage being compared to judge whether input power reversal connection and is timely and effectively taken
Corresponding safeguard measure, and according to the working condition of LED light and buzzer come reflect power supply whether reversal connection, solve in electricity
In sub-circuit experiment, power positive cathode is connect the problem for instead resulting in circuit malfunction due to misoperation.
Technical solutions of the utility model are：A kind of reverse power connection protection device of Electronic-Lab, including integrated fortune
Calculate amplifier, triode, 555 multi-resonant oscillating circuits 2, buzzer 3, LED light emitting diodes；
After the integrated operational amplifier to input voltage by being compared, output signal control triode T1, T2, T3
Working condition, so as to control the electric power thus supplied of 555 multi-resonant oscillating circuits 2, and then control LED lumination of light emitting diode and buzzing
The sounding of device 3.
Resistance R1, R2, the R3 being sequentially connected in series are connected in parallel on the two ends of input power and partial pressure sampling, resistance R1 are carried out to it
The in-phase input end of integrated operational amplifier A1 and the inverting input of integrated operational amplifier A2 are connected to the connection end of R2；
The connection end of resistance R2 and R3 is connected to the inverting input of integrated operational amplifier A1 and the same phase of integrated operational amplifier A2
Input, the output end of integrated operational amplifier A1 is connected by resistance R4 with the anode of diode D1, integrated operational amplifier
The output end of A2 is connected by resistance R5 with the anode of diode D2, the negative electrode of diode D1 base simultaneously with triode T1, T4
Pole, the inverting input connection of integrated operational amplifier A3；The negative electrode of diode D2 base stage, collection simultaneously with triode T2, T3
In-phase input end into operational amplifier A 3 is connected；The colelctor electrode of triode T1 is connected to positive supply with the emitter stage of triode T2
Input；The emitter stage of triode T4 is connected to negative supply input with the colelctor electrode of triode T3；The emitter stage of triode T1
Positive electricity source output terminal is connected to the emitter stage of triode T3；The colelctor electrode of triode T2 is connected to the colelctor electrode of triode T4
Negative electricity source output terminal；The output end of the integrated operational amplifier A3 is connected to the negative electrode of voltage-stabiliser tube DZ, and by resistance R6 with
The base stage connection of triode T5, the colelctor electrode of triode T5 is connected by resistance R9 with power supply VCC, the emitter stage of triode T5 and
555 multi-resonant oscillating circuits 2 are connected.
The emitter stage of the triode T5 8 pin simultaneously with 555 multi-resonant oscillating circuits 2,4 pin be connecteds, and 555 multi-harmonic-oscillations are electric
Road 2 includes 555 time-base integrated circuits, resistance R7, R8, electric capacity C1, C2, diode D3, D4；The 8 of 555 time-base integrated circuit
Pin is connected by resistance R7 with its 7 pin, and its 7 pin is connected with the anode of diode D4, and by the moon of resistance R8 and diode D3
Pole connects, and the anode of diode D3 is connected with the negative electrode of 2 pin, 6 pin and diode D4 of 555 time-base integrated circuits simultaneously, when 555
2 pin and 5 pin of base integrated circuit are grounded by electric capacity C1, electric capacity C2 respectively, and 3 pin of 555 time-base integrated circuits pass through resistance R11
Base stage with triode T6 is connected, and the colelctor electrode of triode T6 is connected with one end of buzzer 3, and the other end of buzzer 3 passes through
Resistance R10 is connected with power supply VCC, and the emitter stage of triode T6 is connected with the anode of LED, LED
Minus earth.
Operation principle of the present utility model is：
After switching on power, after integrated operational amplifier A1, A2 compare input supply voltage, output signal controls three poles
The working condition of pipe, so that switch the positive-negative polarity of out-put supply, and by LED and the work feelings of buzzer 3
Whether condition is correct to judge the polarity that input power is accessed；
When input power both positive and negative polarity is accessed it is correct when, integrated operational amplifier A1, A2 export high level signal and low respectively
Level signal, diode D1 conductings, diode D2 cut-offs, triode T1, T4 conducting, the emitter stage output high level of triode T1
Signal, the colelctor electrode output low level signal of triode T4, the both positive and negative polarity of output end Uo is constant, and triode T2, T3 cut-off are integrated
Operational amplifier A 3 exports low level signal, triode T5 cut-offs, and 555 multi-resonant oscillating circuits 2 power off, buzzer 3 not sounding, hair
Optical diode LED does not light；
When input power both positive and negative polarity reversal connection, integrated operational amplifier A1, A2 export low level signal and high level respectively
Signal, diode D1 cut-offs, diode D2 conductings, triode T1, T4 cut-off, triode T2, T3 conducting, the transmitting of triode T3
Pole exports high level signal, and the colelctor electrode output low level signal of triode T2, the both positive and negative polarity of output end Uo is constant, integrated computation
Amplifier A3 exports high level signal, and triode T5 conductings, 555 multi-resonant oscillating circuits 2 obtain electric work, and buzzer 3 sends prompting
Sound, LED lights；
The beneficial effects of the utility model are：The reverse power connection protection device of a kind of Electronic-Lab, by defeated
Enter supply voltage and be compared to judge whether input power reversal connection and timely and effectively takes corresponding safeguard measure, and pass through
Buzzer judges whether power positive cathode is correct, solves in electronic circuit reality with the working condition of LED light emitting diodes
In testing, power positive cathode is connect the problem for instead resulting in circuit malfunction due to misoperation.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model；
Each label in figure：1- integrated operational amplifiers, 2-555 multi-resonant oscillating circuits, 3- buzzers, LED- light-emitting diodes
Pipe, D1 ~ D4- diodes, T1 ~ T6- triodes, DZ- voltage-stabiliser tubes, C1 ~ C2- electric capacity, R1 ~ R10- resistance.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the utility model is described in further detail.
Embodiment 1：As shown in figure 1, a kind of reverse power connection protection device of Electronic-Lab, including integrated computation is put
Big device, triode, 555 multi-resonant oscillating circuits 2, buzzer 3, LED light emitting diodes；
After the integrated operational amplifier to input voltage by being compared, output signal control triode T1, T2, T3
Working condition, so as to control the electric power thus supplied of 555 multi-resonant oscillating circuits 2, and then control LED lumination of light emitting diode and buzzing
The sounding of device 3.
Resistance R1, R2, the R3 being sequentially connected in series are connected in parallel on the two ends of input power and partial pressure sampling, resistance R1 are carried out to it
The in-phase input end of integrated operational amplifier A1 and the inverting input of integrated operational amplifier A2 are connected to the connection end of R2；
The connection end of resistance R2 and R3 is connected to the inverting input of integrated operational amplifier A1 and the same phase of integrated operational amplifier A2
Input, the output end of integrated operational amplifier A1 is connected by resistance R4 with the anode of diode D1, integrated operational amplifier
The output end of A2 is connected by resistance R5 with the anode of diode D2, the negative electrode of diode D1 base simultaneously with triode T1, T4
Pole, the inverting input connection of integrated operational amplifier A3；The negative electrode of diode D2 base stage, collection simultaneously with triode T2, T3
In-phase input end into operational amplifier A 3 is connected；The colelctor electrode of triode T1 is connected to positive supply with the emitter stage of triode T2
Input；The emitter stage of triode T4 is connected to negative supply input with the colelctor electrode of triode T3；The emitter stage of triode T1
Positive electricity source output terminal is connected to the emitter stage of triode T3；The colelctor electrode of triode T2 is connected to the colelctor electrode of triode T4
Negative electricity source output terminal；The output end of the integrated operational amplifier A3 is connected to the negative electrode of voltage-stabiliser tube DZ, and by resistance R6 with
The base stage connection of triode T5, the colelctor electrode of triode T5 is connected by resistance R9 with power supply VCC, the emitter stage of triode T5 and
555 multi-resonant oscillating circuits 2 are connected.
The emitter stage of the triode T5 8 pin simultaneously with 555 multi-resonant oscillating circuits 2,4 pin be connecteds, and 555 multi-harmonic-oscillations are electric
Road 2 includes 555 time-base integrated circuits, resistance R7, R8, electric capacity C1, C2, diode D3, D4；The 8 of 555 time-base integrated circuit
Pin is connected by resistance R7 with its 7 pin, and its 7 pin is connected with the anode of diode D4, and by the moon of resistance R8 and diode D3
Pole connects, and the anode of diode D3 is connected with the negative electrode of 2 pin, 6 pin and diode D4 of 555 time-base integrated circuits simultaneously, when 555
2 pin and 5 pin of base integrated circuit are grounded by electric capacity C1, electric capacity C2 respectively, and 3 pin of 555 time-base integrated circuits pass through resistance R11
Base stage with triode T6 is connected, and the colelctor electrode of triode T6 is connected with one end of buzzer 3, and the other end of buzzer 3 passes through
Resistance R10 is connected with power supply VCC, and the emitter stage of triode T6 is connected with the anode of LED, LED
Minus earth.
Specific embodiment of the utility model is explained in detail above in conjunction with accompanying drawing, but the utility model is not limited
In above-described embodiment, in the ken that those of ordinary skill in the art possess, the utility model can also not departed from
Various changes can be made on the premise of objective.
Claims (3)
1. the reverse power connection protection device of a kind of Electronic-Lab, it is characterised in that：Including integrated operational amplifier, three poles
Pipe, 555 multi-resonant oscillating circuits（2）, buzzer（3）, LED light emitting diodes；
After the integrated operational amplifier to input voltage by being compared, the work of output signal control triode T1, T2, T3
Make state, so as to control 555 multi-resonant oscillating circuits（2）Electric power thus supplied, and then control LED lumination of light emitting diode and buzzer
（3）Sounding.
2. the reverse power connection protection device of Electronic-Lab according to claim 1, it is characterised in that：It is sequentially connected in series
Resistance R1, R2, the R3 for are connected in parallel on the two ends of input power and partial pressure sampling are carried out to it, and resistance R1 is connected with the connection end of R2
The in-phase input end of integrated operational amplifier A1 and the inverting input of integrated operational amplifier A2；The connection of resistance R2 and R3
End is connected to the inverting input of integrated operational amplifier A1 and the in-phase input end of integrated operational amplifier A2, and integrated computation is put
The output end of big device A1 is connected by resistance R4 with the anode of diode D1, and the output end of integrated operational amplifier A2 passes through resistance
R5 is connected with the anode of diode D2, the negative electrode of diode D1 base stage, integrated operational amplifier A3 simultaneously with triode T1, T4
Inverting input connection；The negative electrode of diode D2 base stage, the same phase of integrated operational amplifier A3 simultaneously with triode T2, T3
Input is connected；The colelctor electrode of triode T1 is connected to positive supply input with the emitter stage of triode T2；The hair of triode T4
Emitter-base bandgap grading is connected to negative supply input with the colelctor electrode of triode T3；The emitter stage of triode T1 connects with the emitter stage of triode T3
Then positive electricity source output terminal；The colelctor electrode of triode T2 is connected to negative electricity source output terminal with the colelctor electrode of triode T4；The collection
Output end into operational amplifier A 3 is connected to the negative electrode of voltage-stabiliser tube DZ, and is connected with the base stage of triode T5 by resistance R6,
The colelctor electrode of triode T5 is connected by resistance R9 with power supply VCC, the emitter stage of triode T5 and 555 multi-resonant oscillating circuits（2）
Connection.
3. the reverse power connection protection device of Electronic-Lab according to claim 2, it is characterised in that：Three pole
The emitter stage of pipe T5 simultaneously with 555 multi-resonant oscillating circuits（2）8 pin, 4 pin connection, 555 multi-resonant oscillating circuits（2）During including 555
Base integrated circuit, resistance R7, R8, electric capacity C1, C2, diode D3, D4；8 pin of 555 time-base integrated circuit pass through resistance R7
It is connected with its 7 pin, its 7 pin is connected with the anode of diode D4, and is connected with the negative electrode of diode D3 by resistance R8, diode
The anode of D3 is connected with the negative electrode of 2 pin, 6 pin and diode D4 of 555 time-base integrated circuits simultaneously, and the 2 of 555 time-base integrated circuits
Pin and 5 pin are grounded by electric capacity C1, electric capacity C2 respectively, and 3 pin of 555 time-base integrated circuits are by resistance R11 and triode T6's
Base stage is connected, the colelctor electrode and buzzer of triode T6（3）One end connection, buzzer（3）The other end by resistance R10 with
Power supply VCC is connected, and the emitter stage of triode T6 is connected with the anode of LED, and the negative electrode of LED connects
Ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621122647.2U CN206211534U (en) | 2016-10-14 | 2016-10-14 | A kind of reverse power connection protection device of Electronic-Lab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621122647.2U CN206211534U (en) | 2016-10-14 | 2016-10-14 | A kind of reverse power connection protection device of Electronic-Lab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211534U true CN206211534U (en) | 2017-05-31 |
Family
ID=58761672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621122647.2U Expired - Fee Related CN206211534U (en) | 2016-10-14 | 2016-10-14 | A kind of reverse power connection protection device of Electronic-Lab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211534U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254645A (en) * | 2018-03-16 | 2018-07-06 | 昆明理工大学 | A kind of exclusion quality detection device |
-
2016
- 2016-10-14 CN CN201621122647.2U patent/CN206211534U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254645A (en) * | 2018-03-16 | 2018-07-06 | 昆明理工大学 | A kind of exclusion quality detection device |
| CN108254645B (en) * | 2018-03-16 | 2023-09-29 | 昆明理工大学 | Device for detecting resistance of discharge |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20181014 |
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| CF01 | Termination of patent right due to non-payment of annual fee |