At twelve to twenty minutes of noon, the technical display officially began. In the eight compartments separated by the screen, each creator began to send telegrams to other compartments to verify whether the new telegram technology can achieve "multiple-point simultaneous sending and receiving".

The people around the compartment were focused on looking at each compartment. Lin Youdi held the "technical instructions" and stared at the compartment while looking.

Watching the operators sending telegrams in an orderly manner, watching the receiver next to the transmitter keep leaving "points" and "scratch" on the paper tape, my heart is filled with emotions.

Obviously, this new technology is fine. The eight compartments represent eight telegram sending and receiving points. At the same time and on the same circuit, they send and receive telegrams together, which truly breaks through the technical difficulties.

So many people, a technical difficulty that has not been able to break through after working hard for more than 20 years, was broken through by a person who "has entered the industry halfway".

The key point is the "filter".

The patent applicant named the circuit device that filters alternating current (radio waves) with different frequencies as "filter". The name is very appropriate, meaning a device that can filter radio waves.

Several technical teams have been unable to solve this device for many years. Now that everyone saw the real thing, they suddenly realized: So that's it!

Electrical science has been developing for nearly thirty years, and many knowledge and theories have been continuously improved. Then it is well known (within academic scope), and many circuit components have been invented by researchers, including inverters, rectifiers, transformers, capacitors, and inductors.

The inverter can turn DC power into AC power, the rectifier can turn AC power into DC power, and the transformer can increase or decrease the voltage, which is very magical.

A capacitor is a "capacitor" that holds current (alternative power). When the AC power in the circuit is too high, the capacitor will hold excess electricity; if the current in the circuit decreases, the capacitor will "discharge" the excess electricity to stabilize the circuit current.

Therefore, the function of a capacitor is like a reservoir, where more water is stored and less water is released.

As for inductors, they are components that can convert current into magnetic force and store them.

The structure of the inductor is similar to a transformer, but it only has one winding and has a certain inductance, which only hinders the change of current.

If the inductor is in a state where no current passes through, when the circuit is turned on, it will try to prevent the current from flowing through it; if the inductor is in a state where there is current passes through and when the circuit is turned off, it will try to keep the current unchanged, which is similar to a reservoir.

These two circuit components have been available more than 20 years ago and have filtering characteristics. However, technicians have never found a good solution to how to use this characteristic to achieve telecommunications communication.

Now, after seeing the circuit diagram of the "filter", we know that capacitors and inductors can be used in this way.

In the eight compartments, the operator sends a message, and its DC signal passes through the inverter and turns into an alternating current signal of eight frequencies, enters the telegram line, and mixes it together.

This "hybrid electrical signal" "flows" in the circuit. Every time it reaches the closing end of a compartment, the "filter" at the closing end filters the "composite electrical signal".

The "filter" "blocks" current at a specific frequency, introduces it into the rectifier of the compartment, and turns it into a DC signal, allowing the electromagnet at the receiving end of the compartment to work.

Currents of other frequencies continue to flow in the telegram line through the "filter", arrive at the closing end of the next compartment, and are "filtered".

Because alternating currents of different frequencies do not interfere with each other in the same circuit, and can reliably divide specific currents by relying on the "filter", it is possible to use one telegram line to transmit and receive telegrams at the same time.

A great invention is amazing!

Lin Youdi thought, just like others, in his eyes, looking at Yuan Tiangang, the applicant for this technology, was not only admiration but also admiration.

This cheeks are thin and look at least over forty years old. Although he is not young, he has only been learning electrical knowledge for a few years but has achieved such shocking achievements. As technicians who have been working for many years, he really has to work hard.

Yuan Tiangang, who became the focus of everyone's attention, stared at the transmitter on the high-legged table in the compartment in front of him.

This transmitter is not a key transmitter used in Yizhou Zhouxue Laboratory. Its structure is much more complicated and he has never seen it before.

However, after a while of careful observation, Yuan Tiangang found that the transmitter was similar to a music box, and he used a hole-punched paper bag to "play music".

In other words, the sender compiles the content of the telegram to be sent into a four-digit telegram code in advance, then punches holes on the paper tape, "writes" the telegram code on the hole-punched paper tape, and then feeds the hole-punched paper tape into the transmitter.

Shake the handle, so the transmitter turns the telegram code into a DC signal like a music box and sends it out.

In this way, the speed of sending the report is immediately increased several times, and because the perforated paper tape can be "kept at the bottom", the sender can check whether the content of the telegram is incorrect before and after sending the report.

‘Sure enough, the court has done a deep study of telegraphs.’

Yuan Tiangang thought so, twisted his beard under his jaw and nodded silently. Seeing that Lin Youdi was about to ask a question when he was about to be a master Lin Youdi, he bowed and asked, "Master Lin, don't know what questions he has?"

Lin Youdi smiled and waved his hand: "Why do you need to be so kind? The telegram technology invented by Mr. can only support twelve points to send and receive telegrams at the same time?"

"Yes, I am not talented, and the inverter is not accurate, so the frequency error of the AC power generated by the inverter is large, so the frequency interval between the AC power must be larger, otherwise it will easily overlap with each other."

"So that's it. So, as long as you use more precise electrical components, you want to have a significant increase in the "points" of sending and receiving telegrams on a line?"

Yuan Tiangang nodded: "That's right."

While the two were talking, the experiment ended and it was a great success. Officials from the Patent Office announced that the experiment results were valid, and Lin Youdi was the first to applaud.

Amidst the tide of applause, people retreated and made way out, and Yuwen Wen walked forward with a smile.

When Yuan Tiangang saw the emperor coming, he quickly saluted: "The Caomin has seen Your Majesty!"

"Mr. Yuan's Tai Chi Xuan skill can reverse current. I have seen it with my own eyes and I feel it is extremely wonderful." Yuwen Wen looked at this famous prophetic master in history and felt no discomfort at all, all of them were joy.

"The people are afraid of the people. This is just a trick of being a carved person. You can't bear the praise of His Majesty so much."

Yuan Tiangang was neither humble nor arrogant when facing the emperor. Although it was his first time to meet the emperor, he did not look like an ordinary person who was anxious and even said something unscrupulous.

"No, it is affordable. This technology is necessary to benefit the country and the people, and the court is used for a fee."

Yuan Tiangang was stunned when he heard this and quickly said, "Your Majesty! Caomin is willing to present this patent to the court!"

"No, I know the story of Zilu's redeeming people. If Mr. Bai's invention was born in the court, then no one in the world would be willing to apply for a patent for their inventions, and the patent system would be in name only."

After Yuwen Wen finished speaking, he looked at Yuan Tiangang, nodded in praise, and said, "Sir, I am very happy to have a heart disease for me. Whatever you want, just speak!"

Yuan Tiangang was looking forward day and night, and he was looking forward to the emperor saying this, without being pretentious. After saluting again, he said: "Your Majesty, the people of Cao have long been yearning for the Wuzhuang Temple in Xiyang. I hope to go to Wuzhuang Temple and conduct in-depth research on high-voltage current!"

"High voltage current? Mr., do you mean to be qualified to call the power from Huangzhou power supply?"

"yes."

There is a "source of lightning" (hydropower station) in Huangzhou, which is no longer a secret in the academic circle, so Yuwen Wen is not surprised that the other party knows this, and he asked curiously:

"I heard from the official of the Patent Bureau that the teacher knew astronomy and geography, and also knew the 'wind and divination skills, but his career was not smooth, so he resigned from his official position and was idle for many years. Why don't he go to office and serve the country now?"

Yuan Tiangang replied: "Your Majesty, Cao people think that electricity is mysterious and contains the power of heaven and earth's creation. Cao people have been enlightened for many years, but they cannot enter. The key point is electricity."

"The grass people were wasting their time for many years and were able to learn electrical science several years ago. They only felt that they could die in the morning and that they could die in the evening. I hope to enter the Wuzhuang Temple to realize the Tao with their trunk body!"

Yuwen Wen was quite moved when he heard this: he even said the word "Authentication"!

Regardless of whether this person is a charlatan or a living god, he only said that in order to study electrical science, he would not hesitate to change his career and go to Wuzhuang Temple to "enlighten the Tao". Yuwen felt that if he did not agree, it would be inhumane, so he nodded:
Chapter completed!