Countercurrent 1982

Chapter 693 Luxurious Audition Room

Just as the people of the whole country were immersed in the joy of the festival, Duan Yun started the work of the new year early.

By the afternoon of the second day of the new year, Duan Yun had already started to work in the factory.

In the past few days, whether it is a labor service company or an electronics factory, there are a small number of workers on duty. Duan Yun’s management is relatively loose these days. Hard dishes such as duck and fish meat, and all meals are free these days, the entire account is on Duan Yun's head.

In the past two days, Duan Yun mainly wandered around the new house of the electronics factory, checking the ventilation of the room. In addition, he would ask the workers to clean up and clean the place every day, and arranged the exhibition hall in advance to display all the speaker products in the factory. Neatly arranged, and Duan Yun also used the enlarged photos taken by himself for decoration. The whole exhibition hall looks very grand and beautiful.

As for the audition room, Duan Yun placed one of the most high-end subwoofer speakers in the factory in the four corners of the house, and three rows of high-end leather sofas in the middle, and the interior lighting is also set according to the stage of the workers’ club. Duan Yun We also specially designed a circuit board, which can automatically adjust the flashing of the lights according to the audio. It took two days to arrange for an electrician to install and debug. Duan Yun is also very satisfied with the effect, especially when playing rock music, the lighting effect is very good. It is easy to feel excited and shocked when you are in it.

In fact, Duan Yun has always wanted to install LED display screens on the four walls of his audition room, so that the rhythm and melody of the music can appear on the display screen in a wave-like shape, just like the wave screens of music software on computers in later generations Obviously, it's just that there is no such thing in this era, so it is impossible.

However, although you can't buy ready-made LED screens, Duan Yun can still make a reduced version of the display screen through other means.

During the Chinese New Year, there were no production orders in the factory, so dozens of workers were transferred from the workshop to specialize in this simple version of the LED display.

The LED light of later generations is a semiconductor material chip that emits light from a TV. It is fixed on the bracket with silver glue or white glue, and then the chip and the circuit board are connected with silver or gold wires, and sealed with epoxy resin for 4 weeks to protect the internal chip. , and finally install the shell, the shock resistance of this LED light is very good.

Duan Yun can't buy this kind of semiconductor light-emitting material, but he can use a large number of small light bulbs for teaching physics experiments to replace them. This is the kind of small light bulb used in flashlights, and it is only the size of a little finger.

Compared with light-emitting diodes, this kind of small light bulb consumes more power, and its durability is also poor. It is easy to burn out the filament if it flashes frequently for a long time. of.

In addition, the LED displays in the future market are driven by single-chip microcomputers, and Duan Yun has several second-hand 8088 chips and many ne55 chips, which can be used to make a simple version of the LED display.

Duan Yun asked people to make 80 flat and clean wooden boards, and each board was neatly and densely installed with 100 small light bulbs. The 80 wooden boards used a total of 8000 small light bulbs, and the area just covered the entire front row of the audition room and the middle of the two walls. The part that looks very spectacular.

The single-chip microcomputer program for control is written by Duan Yun himself. This small program is not complicated, and Duan Yun can easily write it.

The principle is to regard the volume as an equalizer in a music system. In the equalizer, you can see the LED jumping according to the music. If the music volume is too high, the equalizer will reach the peak value, and if the volume is too low, it will Low, with the help of microphone, operational amplifier and voltage comparator, let the LED light up when the volume changes. If the volume is too high, multiple LED lights will light up. If the volume is too low, individual LED lights will light up. Volume meter It can also be used as a volume detection device.

Among them, the capacitor MAC or the microphone is a sound-sensing transducer that can convert sound energy into electrical energy, so the sensor designed by Duan Yun can use sound to change the voltage.

The principle of this circuit is very simple. First, the microphone picks up the sound signal and converts it into a level signal that is linearly related to the sound intensity. Therefore, a high volume has a high level, and a low volume will generate a low level. Then the voltage signal passes through a high-pass filter to filter out the noise. After the signal is filtered out, it is amplified by the amplifier. Finally, the number of LED lights to be measured is determined by the sound level, that is, the number of small light bulbs that can be lit.

During the few days of Chinese New Year, Duan Yun spent every day in the workshop, organizing workers to install and test this kind of dot-matrix light screen, and installed these matrix boards behind the wall of the audition room. Considering that the light of small bulbs is sometimes very dazzling, So Duan Yun added a layer of glass with blue plastic film on the outside.

After everything was assembled, Duan Yun sat alone on the soft sofa in the audition room. There was a modified classical record player on the table in front of him. With the thick curtains drawn, the room was instantly dark, but in the beautiful The moment the melody of , the light matrix on both sides of the wall lights up with the rhythm, and the bright blue star dots make Duan Yun in it seem to be drifting in an endless blue ocean, which is very moving and dreamy.

And when Duan Yun changed to a rock song, the red light matrix in front began to move with a strong and bright rhythm, like a hot flame, and the speakers placed in the four corners had a strong three-dimensional effect, which made people feel A heartbeat and fanatical feeling of being in a rock music scene.

For four days in a row, Duan Yun spent every day in this audition room, organized dozens of technical workers, and made many improvements to the interior decoration here. In addition to the audition room, Duan Yun also made improvements to the exhibition room. carefully arranged.

Duan Yun’s aesthetics is greatly influenced by later generations. In his opinion, the layout of the exhibition hall is also very important, because this is the first stop for merchants to visit products. If the products can leave these merchants with a deep and strong first impression Impression, then it will be relatively easy to get an order.

Goods with high quality and low price are what every businessman likes, and before the product has officially received market feedback, the grade of the product is actually packaged.

Duan Yun's exhibition hall is very elegantly arranged, and even some classical decorations are placed inside, such as the statue of Venus with a broken arm, the imitation of the Mona Lisa portrait, and other imitations of famous European and American paintings in the civilized world.

Duan Yun just wants to make his speaker packaging more elegant, so that when people enter the exhibition hall, they can quickly associate these subwoofer speakers with the words "classical", "European and American", and "artwork". This is also in line with the yearning and admiration of Chinese people for the culture of developed countries in Europe and America in this era. To put it bluntly, it is worshiping foreigners...

(End of this chapter)