Acousto-optic control corridor light switches are designed with ready-made acousto-optic control switches, which are available in electrical stores, up to 20.

Thank you very much for helping the paper "Acousto-optic control of corridor light switch"! 043 1, 0462 graduation design (thesis) electronic topic

Design of 1. photoelectric counter

(Design requirements:

1, realizing counting in the range of 0-999, and giving an overflow alarm after exceeding the maximum value;

2. Require the use of infrared light-emitting diodes and photovoltaic cells for detection;

3, can alarm at the set value, can automatically turn off the alarm and automatically count again after a delay of 3 seconds; You can clear the alarm manually;

4. The distance between the photoelectric transmitting tube and the receiving tube should be greater than 1 m;

5. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Cui Hong

Second, the design of water temperature controller

1, the water temperature can be controlled between 25℃ and 60℃;

2. It can be adjusted in steps of 2℃ to control the error of 2℃;

2. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Liu Ming

Third, the digital adjustable regulated power supply

1, controlled by 89C5 1 series microcontrollers;

2. The output voltage can be adjusted arbitrarily between 0 and 0-24V, the resolution is 0. 1V, and the maximum output current is1.5a; ;

3. The overall efficiency is more than 60%;

4. Draw a complete circuit schematic diagram (including power supply part) and PCB board diagram, and write a complete assembly program.

Instructor: Liu Xiaochun

Fourthly, the design of XX circuit board is realized by protel.

1, draw a complete circuit schematic diagram and PCB diagram;

2. "XX" means that the circuit can be designed by itself, but the number of components must be more than 50 (including at least one integrated circuit with more than 40 pins);

3. Circuit schematic diagram and PCB diagram must have both electronic files and paper files;

4. It is best to make PCB objects through the factory;

5. Describe the design process in detail, including the necessary design principles.

Instructor: Wang

Verb (abbreviation of verb) 12v/220v vehicle-mounted inverter.

1, realizing the conversion from DC 12V to AC220V, and the maximum output current is1a; ;

2. The voltage stability rate is 220v 5%.

3. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Tian Ping

Sixth, the design of electronic thermometer.

1, temperature measurement range 0℃ ~ 100℃, resolution 0.1℃;

2. The measured value is displayed by LED digital tube;

3. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Cui Baoji

Seven, acousto-optic control corridor light switch

1, the light goes out during the day, lights up when there is noise at night, and goes out after a delay of 25 seconds;

2. The maximum power of the bulb is 60W；;

3. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Wang

8. Design of electronic clock based on single chip microcomputer.

1, with 89C5 1 to count seconds, minutes and hours, which can be switched between 24-hour system and 12-hour system;

2. Minutes and time can be calibrated at any time;

3. The timing error is less than 0.0 1 sec/day;

4. Draw a complete circuit schematic diagram (including power supply part) and PCB board diagram, and write a complete assembly program.

Instructor: Li Ling

Nine, lighting control lighting circuit

1, which can respond to the ambient light intensity, that is, when the ambient light intensity is weak (subject to human senses), it can automatically turn on the lighting device and automatically adjust the lighting brightness according to the ambient light intensity;

2. Lighting devices that can control power ≤ 100W;

3. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Liu Xiaochun

X. electronic password lock

1, according to the principle of electronic password lock, the design scheme is put forward;

2. It can keep the locked state after the password lock circuit is forcibly destroyed;

3. The password is 6 digits. When the password is entered correctly, the lock will open automatically.

Instructor: Cui Hong

XI。 Design and Analysis of Modem Circuit (0462 only)

1, collect the principle data of existing modems, and analyze the circuit performance in detail;

2. Put forward your own improved design ideas and make the system block diagram;

3. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Hou Shuaige

Twelve, infrared control automatic faucet

1, with infrared detection, when someone's hand is close to the faucet (10cm), the water will come out automatically;

2. When people stay away from the faucet, stop draining;

3. The faucet is controlled by an electronic valve;

4. Draw a complete circuit schematic diagram (including power supply part) and PCB diagram.

Instructor: Liu Ming

Thirteen. Realization of Simulation of Programmable Amplifier Circuit

1, the amplifier can automatically adjust the magnification according to the programmed input value, and the magnification can be adjusted between 0.0 1 and 100 times;

2. After the circuit is designed, it is simulated by simulation software.

3. Draw the circuit schematic diagram and write the source program.

Instructor: Tian Ping

* 1, 0462 class students who want to choose computer subjects, please apply, in order to transfer to the computer teaching and research section management; 0462 Communication custom topics can be confirmed by contacting Hou Shuaige;

* 2, please be sure to determine the topic before 65438+February 1, and get in touch with the instructor and leave the communication method.

* 3. Each topic can only have 6 candidates at most.

How to design acousto-optic corridor switch? If it is for personal use or engineering use, it is convenient and cheap to buy the finished product of voice-activated optical switch.

If developed, its principle is electret microphone pickup >: amplification > trigger charging capacitor >; Control field effect transistor >: control silicon controlled switch lamp. Low-voltage direct current is obtained from the lamp and the subresistor. If you have any questions, please send an email for consultation. T34cm 200 1 @ yahoo. ..

How does Bai Yao judge the sound and light control of corridor? Voice-activated light Aka Gavintoo. You can seal the switch with a black object and try again.

The principle of acousto-optic control switch is simple. Sound and light are sound and light. Sound control is based on a pickup (commonly known as microphone) as a sensor. This kind of sound can directly cause the metal film in the pickup to vibrate. Just like our eardrum, vibration causes the capacitance change in the circuit, and the voice control circuit controls the switch according to the capacitance change. The light is simpler, and there are photoresistors as sensors. The photoresistor has different resistance under different light, and the light control circuit controls the switch according to the resistance.

How to change the acousto-optic lamp holder in the corridor into a light-controlled switch? Just short-circuit the volume receiver of the voice-activated lamp holder.

There are two possibilities for corridor lights to be acousto-optic controlled street lamps: one is acousto-optic controlled lamp holder control, and the other is acousto-optic controlled switch control lights cannot be acousto-optically controlled.

Acousto-optic controlled energy-saving switch: ec. /tech06/te0809 13.asp to see if it helps you.

Why is the acousto-optic control switch always on for corridor lights? In most cases, the control chip is damaged, which leads to the loss of control of the thyristor switch of the light bulb. It is also possible that the thyristor breaks down and causes the light bulb to stay on.

Can ED lamp be used as acousto-optic control switch? Yes, but you need to change the electronic control circuit (that is, if you use an incandescent lamp), which is more complicated. It is suggested to buy a new acousto-optic control lamp.