Yang Heng's so-called wired telegraph may be the simplest wired telegraph equipment, in terms of hardware, it is composed of four parts: generator, wire, transmitter and receiver.

That's right, it's that simple, that is, Morse code is slightly more complicated, that is to say, the code here is made up of a short dot and cut short, two short dots and intermittent code, the same four digits, and each group of numbers represents a specific Chinese character, why there is no long point, this is because there is no amplification equipment, then it has to use two consecutive short dots to replace the long point, and a short dot represents zero, two short dots represent one, and this is still a hexadecimal encoding method, although it is more complicated, but you can always transmit messages over long distances, isn't it, but the translation is a bit troublesome, and even as a messenger and receiver, you have to go through strict training.

This time, Yang Heng didn't retreat for too long, just thought about it in the room for a day, drew a few drawings and came out.

"Housekeeper, you arrange for someone to find Yang Li, and Yang Li will be responsible for this matter." Who is Yang Li, that is, Xiao Niang's brother Dandan, his tuba is called Yang Li, he is already seventeen years old this year, and he can stand alone, and he is more interested in mathematics, but he is more interested in other studies, even if he continues to study in the academy, there is no big interest, so Yang Heng will start arranging their work for these little brothers one by one, officialdom, that needs to be interested, otherwise there will be a special profession to do for them.

When someone went to inform Yang Li, Yang Heng was not idle, he was studying the matter of wire drawing with some jewelry coppersmiths. That is, the copper is pulled out of the wire. And it is a variety of silk with different thicknesses. At this time, Yang Heng had to admire these masters of this era, their craftsmanship was really amazing, they were not only able to pull out thick copper wires, but even thin wires with hair thickness, so that Yang Heng's other thing was solved, that is, enameled wire, or silk wrapped wire can be solved. Some thick copper wires can be wound with silk outside, or directly brush tung oil outside, in this way, part of the copper wire used for testing is available, and then let the masters study how to form the production of industrial words, to know that these things are really used, it is not a simple one meter or two meters, but will be used in large quantities.

"Big brother, you call me. Finally something for me to do. Yang Li ran excitedly, as soon as he received the notice from the housekeeper. It was an excited trot that came all the way, without even a single stumble.

Yes, all along, that is, Xiaoniang can help Yang Heng, but these people have been tied to the academy by Yang Heng, that is, they will help when they hold a party, and the others are gone, they see Yang Heng so busy for this family, and they are also anxious, to say that the most profound experience, it is still this group of friends, they suffered at the beginning, they enjoyed it personally, and they know how this good day came, to be honest, it is very grateful to Yang Heng, So they are all sprouting, and they have to study hard to help Yang Heng.

Finally, Yang Li began to prepare for something to do.

"Well, there's something, but you still have to go back to the academy, come, you listen to me first, you listen, drip, drip, drip, drip, this represents one zero zero zero, this is the notation of the hexadecimal system, if it becomes a decimal system, it represents the number eight......" Yang Li is worthy of being a child who is more interested in numbers, after Yang Heng explained to him a few times, he understood that the decimal system and the hexadecimal system are converted to each other, and even the six numbers from ten to fifteen are replaced by ABCDE, and Yang Heng only stops there, Just five more letters were taught.

"Your task now is to use these codes to compile the thousand-character text first, and then slowly add some other words, but the other words are not in a hurry, and you, after returning to the academy, the main thing is to organize a coding group to come out, this is your temporary main thing, and after the thousand-character text is completed, you will assign a deputy team leader, and you need to assist me, and even in the future, you will be the main person in charge of this cable telegraph project."

"No, big brother, Dandan will definitely complete the task." As he spoke, he turned around and was about to leave. "Don't worry, since you're back, let's play at home for a few days first, and then follow my eldest brother to understand the process of this work." Yang Heng naturally wouldn't let Dandan continue to run back immediately, if he didn't understand anything, how would the work be carried out in the future.

"Big brother, this is a generator, what is a generator for?" As he spoke, he was about to touch the thread. "Don't touch it, you'll die." Yang Heng nervously pulled the balls away, and then used two bamboo sticks to wrap the two threads around each other, "Look, this is a spark, caused by the electricity that was sent, just like that, the copper was burned." ”

But at this time, there is no such thing as a voltmeter ammeter, Yang Heng doesn't know what the voltage is, so just don't let people touch it, isn't there glue, the people who contact this wire and telegraph are to make them a pair of gloves and a pair of boots first, mainly for insulation, and also, in the workplace, they are all paved with wooden boards, so that the degree of insulation is higher.

If you want to say how to make this generator, Yang Heng is naturally a permanent magnet generator, and whether it is a self-excited generator or a self-excited generator, a rectifier is needed, so you can only use a permanent magnet generator, that is, the stator is made of natural magnets. Needless to say, this effect, it is leveraged, look at the spark, it can be used as electric welding, and this power, it is naturally driven by a water wheel, and maybe there will be a wind turbine, no matter what needs to be studied out of the battery, suddenly, Yang Heng found that this generator has it, it seems that there are more things to do, do you want to ask Li Er for an idle job in the Ministry of Engineering, and there is no need to go out in the future, just study some things at home, and the less important ones can be handed over to Li Er.

Dandan left with a cheerful mood, and Yang Heng was starting to make headphones, what does this headset look like, that is, the most primitive kind of high-impedance headphones, and it is relatively bulky and ruthless, a large iron block is wrapped with a thin enameled wire, and then a wooden shell, and the moving piece is made of a round thin iron sheet, but this needs to be tested before it can be done, otherwise it will not make a sound.

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"Your Majesty, I brought you a new gadget today, I wonder if you are interested in trying it out?" "That's it, what is it?" "This is a generator, but more than that, the minister also needs to apply for a wire in the palace." "Oh, what is a wire?" "Wire, that, that's this thing," as he spoke, Yang Heng took out a piece of wire with skin, "This, Cheng, you can pull it." ”

"I said Xuewen, why did you leave, didn't you want to pull the line?" Li Er suddenly found that the Yang family turned around and left. "That, Your Majesty, this pulling wire is quite a troublesome thing, you have to bury the electric pole, what else, it will take two days, you better send a palace guard, or someone else to follow along the way." Suddenly, Yang Heng thought that although Li Er had already agreed, he had no will, and he had left in a hurry.

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"This, what's the use?" Finally, Yang Heng pulled the wires from his home in the city to the palace, but the place in the palace was placed in a place with a river, why, a waterwheel and a generator could be set up in this place, but this time Yang Heng brought one more person, and this person was a telegraph operator recruited by Yang Lizhao.

"Your Majesty, you can say a word, and then someone in my family will send it quickly, and the reply from my family will be known soon."

"Oh, so amazing?" Li Er was a little interested, why could he agree with Yang Heng to pull the wire in the palace, just to see what Yang Heng had made again.

"What to say, then ask who the other party is, who are you, how old are you this year, and there is one more sentence, heaven and earth Xuanhuang, that's all." At this time, I found that the telegraph operator was wearing that huge and ugly headphone, and then he began to press it on his hand, Dididi, Dididi, what a familiar voice.

"I'm Yang Li, and I'm sixteen this year." The answer was very simple, but Li Er didn't react, who knows who is on the other side of the road, maybe it was made up by this Didi person.

"Your Majesty, the horses outside are here." "Quick, quick, get the note in." Li Er was in a hurry. "Who are you, how old are you this year, and there is one more sentence, Heaven and Earth Xuanhuang, that's all. The reply is that I am Yang Li, and I am sixteen years old this year. ”

"This, this, this is the tailwind, how did you do it, how far can this thing be used." Li Er was shocked, if this could be transmitted far away, what would be the effect? (To be continued......)