Graduation project: Photocontrol circuit controller

Abstract:In the public places of schools, institutions, factories and mining enterprises and the public corridors of residential areas, the phenomenon of ever-bright lights is very common, which causes a great waste of energy. In addition, due to frequent switching or human factors, the damage rate of wall switches is very high, which increases the amount of maintenance and wastes money.

At the same time, in order to strengthen our understanding of analog electronic technology and digital electronic technology, I spent 1 week on the design of electronic technology courses, and the subject of my design is the design of sound and light control street lamps, I designed a novel circuit, safe and power-saving, simple structure, easy installation, long service life of sound and light dual control incandescent lamp energy-saving street lamp.

In this design, the composition, performance, scope of application and working principle of a variety of acousto-optic control street lamp controllers are introduced, and the schematic diagram and component parameter selection of each circuit are given, and the power-saving effect is very obvious, and the maintenance amount is greatly reduced, the money is saved, and the use effect is good. During the day, when the light is good, no matter how loud the noise of passers-by, it will not be the light bulb that shines. When the light is dark at night, as long as the pickup of the circuit detects a broken sound, it will automatically light up for pedestrian lighting, and then automatically turn off after a few minutes, saving energy.

Keywords: automatic control; Energy conservation; signal amplification shaping; photoelectric switches; voice-activated circuitry; photocontrol circuits; Delay circuits.

I can help you with detailed guidance

If you have detailed requirements and "**", you can contact HI!

Because the actual microcontroller is a microcomputer with control left and right, through the digital signal 1,0 to achieve your electronic functions, you go to see your circuit diagram, whether you need to do control operations. In the case of a PCB drawing, you need to go to the component library to find your components. Splicing it together, of course, but also more professional implementation of packaging, electrical characteristics, etc., I hope it will help you.

After the voice-activated signal is processed, it is sent to the microcontroller, and the light-controlled information is sent to the microcontroller. After the microcontroller processes it, the switching signal is output.

The microcontroller acts as the controller. The PCB circuit diagram is drawn with professional software, such as Protel.

Hello, your design, single-chip microcomputer terminator has ready-made sales, it is estimated that it is not expensive and there are more than 100 full sets, including the real thing.

The ones that are easy to buy on the market are all 220V voltage, and one is designed for you, and the circuit diagram is shown in the attached diagram; The transformer has 8 10w available. The 12V lamp being controlled uses a 12V AC power supply from a transformer, which is controlled by the normally open contacts of the relay. At the same time, the 12V alternating current passes through the bridge rectifier and is directly supplied to the op amp for work, and the other channel is stabilized to supply the sampling circuit to work.

Op amps can use any single power supply, and the LM324 here is a quad op amp, using one of the op amp units. Triode BG with extended output current can use any small power triode with an output current greater than the relay coil current. The relay uses a coil voltage of 12V, has a normally open contact, and the allowable current of the contact is greater than the current of the bulb.

The photoresistor RT uses the one where the light increases and the resistance decreases, and if the resistance also increases, the RT and R5 can be swapped. The resistance value is not limited but should not be less, R5 and RT resistance value is the same, you can adjust R2 under the specified lighting conditions, so that the lamp just shines. When the light accompanies the destruction of the forest is increased, the voltage VI will rise, the negative voltage of the op amp will increase, the output will be reduced to Yuqing 0V, the relay will be released, and the electric light will be extinguished.

The switch N4148 is the induced voltage when the short-track coil loses power. Other switching diodes can also be used instead. "St.

The 555 circuit provided by Sophia is also very simple, and the 555 is also very easy to buy

I have it in my bai space.

zhi refers to the electric dao road map board. Right.

1) Control the trigger with a photoresistor. 2) It depends on whether you use an analog and digital combination circuit, or use a single-chip microcomputer. Different ways, some different thoughts.

The former can be timed with 555, and the latter is programmed. 3) 74160 is used for digital combination circuits, and it is convenient to use single-chip microcomputer to program single-chip microcomputer. Digital analog stuff, complex circuits and high costs.