Heavenly Dao Formula

The essence of wireless communication is to control the frequency of electromagnetic waves.

As long as the current fluctuates, a correspondingly changing magnetic field will be generated. In other words, the first thing Xia Fan has to do is to make the electric energy of the streamer technique change rapidly—or vibrate in other words.

And the detailed control of the technique has already matured in more than a thousand times of repeated performances.

It only took him two days to use the new streamer technique to let out a sharp howl. This "sound" has a very high frequency and cannot be captured by the human ear, but under the electromagnetic background, it is like a raging ripple, centering on Fengyang Villa and spreading out to all around Qiguo in an instant.

Xia Fan witnessed all this through the swinging magnetic needle.

Like the shocking justice, this new technique based on the streamer technique should also have a distinctive name.

He named it "Xunyin", after the second half of a groundbreaking electronic song.

The next step is to make magic tools.

This is also the enlightenment given to him by Mo Yun's celestial motion instrument-Xia Fan never hopes that only he can perform this technique, otherwise he will have to stay at the dispatching station whenever he has nothing to do, and become a part of the communication equipment. In that case, how can there be time to play with the fox demon?

And Mo Yun also spared no effort in teaching the making of magic weapons, almost teaching him to carve the first vibration magic weapon of the sound-sounding technique.

The trick is to condense the qi on the fingertips, and while engraving the talisman, the consciousness is concentrated on the effect you want to express.

The key is the idea.

The clearer the idea, the higher the final yield.

This is also the key difference between carpenters carving sculptures and alchemists carving magic tools.

The talisman chosen by Xia Fan is naturally an oscillating circuit - it is only composed of a power supply, an inductor and a capacitor, representing the most basic resonance principle, after all, no matter how advanced he is, he can't draw it. In addition, the place where the power source should have been was replaced by a streamer talisman. On this artifact, the essence of the two eras has been combined for the first time.

"Okay..." Ning Wanjun put down the magic weapon, and circled around the equipment he prepared several times, "How do you prove that it can...um, send messages over a long distance?"

"Just wait." Xia Fan said calmly, "I have sent Li to the Privy Council Mansion, where she will contact us."

"The Privy Council?" The princess glanced in the direction of Jinxia City, "Shouldn't be able to hear the shouts at this distance. Then... what will I see? Is it a note that appeared out of thin air, or—"

Just when she was halfway through speaking, there was a sudden sizzle sound from the receiver.

Then, Li's familiar voice sounded in front of everyone, "Xia Fan...can you hear me? Hey...this thing should be used in this way, right? In case...hey...you remember to reply me as soon as possible..."

The voice was intermittent and accompanied by obvious noises, but even so, it was indeed Li talking!

This scene made everyone present look shocked!

Xia Fan unhurriedly drove the Xunyin instrument, converted his voice into high-frequency radio waves and emitted it, "I heard your voice."

After a short pause, a voice came from there again, "That's it... that's all right."

When Li's voice fell to the ground, the scene exploded!

"Is this true? Miss Li is now in Jinxia City?"

"It's three or four miles from the villa to the Privy Council!"

"The thing making the sound seems to be this drape—"

"Lord Xia, can only alchemists use it?"

Some couldn't believe it, some looked around for Li, and some asked Xia Fan... All of a sudden, there was an uproar in front of the lobby.

"Okay." Until Princess Guangping spoke, everyone stopped talking, "If I remember correctly, there is a spell in Sunda that can amplify the sound several times, but the distance is extremely limited, and it is impossible to talk back and forth like you. Xia Fan, how did this thing do it?"

In fact, Ning Wanjun was no less shocked than the others at the moment. If only she and Xia Fan were present, she probably couldn't help but stepped forward to ask for a experience.

Now that there are so many people around watching, she could only continue to maintain the dignity of the princess, and asked pretendingly calmly.

"The shock technique can turn sound into an invisible electromagnetic signal. As long as there is suitable equipment, the signal can be restored to sound. This is the basic principle of the sound instrument." Xia Fan explained concisely.

"Electrical... what signal?"

A group of people were stunned after listening to it, obviously it was beyond their comprehension.

Xia Fan didn't intend to go into details, because this is not something that can be explained clearly in one or two sentences. The effect of the spell depends on the consciousness of the caster, which is also the key to allowing the current to oscillate according to his own ideas, thus skipping the two thresholds of wired communication and wireless telegraphy, and directly reaching the target in one step.

Regardless of the shock technique, the receiver is something completely unrelated to alchemy. It was a simplified version of an ore radio, using pyrite as the detection core, which can convert electromagnetic waves into oscillating currents, and through the interaction of copper wire coils and magnets, restore the voice of the speaker.

It cannot be tuned, nor does it have a filter function, which causes continuous noise when transmitting messages, and the sound quality only stays at the level where you can hear what the other party is saying. But for such a thing, it took much longer than researching new alchemy. Just a suitable piece of pyrite made Xia Fan rummage in the blacksmith's shop for several days.

Mineral radios were popular in the streets and alleys of the motherland in the 1960s, and parts could even be bought in canteens. Although Xia Fan did not personally experience this era, he has also tinkered with several collections at home. Even so, it took him a lot of brainpower to piece together a simplified version of the receiver with the materials at hand.

Fortunately, after repeated attempts, the first principle machine finally met his most basic requirements.

"Cough... what I'm asking is not the principle." Ning Wanjun immediately realized that her questioning method was wrong, and then changed the questioning method, "Do you have to be a person who is sensitive to send messages to each other?"

"It is necessary to send a message, but not to receive it. The sound from one sound instrument can be heard by multiple receivers." The biggest advantage of the ore radio is that it is easy to use and does not even need a power supply.

"How far can this sound travel?"

"It's only tens of miles at the moment." Xia Fan made an estimate. After all, the audio instrument and receiver are quite simple, and there is still a lot of room for improvement in the future. question."

In fact, not to mention the Great Enlightenment, even the Six Nations will be shrouded in invisible electromagnetic waves.

"Then... what restrictions does it have?" Ning Wanjun couldn't help but clenched her hands and asked. A magic weapon that can transmit sound for thousands of miles and can be restored at any time is definitely something that the army dreams of. The battlefield situation is changing rapidly, whoever can gain the advantage in intelligence will be able to seize the opportunity!

"Except for those who are sensitive, there are no restrictions."

"It has nothing to do with terrain, weather, day and night?"

"Yes." Xia Fan affirmed, as one of the epoch-making products, how could radio be such an inconvenience?

"I understand." Ning Wanjun raised her head and patted him on the shoulder heavily, "The proposal you mentioned at the meeting before, try to come up with a charter."