Roland wiped the fine sweat on Anna's forehead and put her in his arms.
In the dim light, a seductive blush could be seen on the girl's face.
Since the last time I talked to her about dreams, Roland always felt that Anna had become more active in this regard, and she would try to learn some new skills—but compared to the knowledge in books, her progress in this area was slower. Not a lot. Looking at Anna's clumsy and serious appearance, it was a completely new experience for him. The visual enjoyment even surpassed the sensory experience, and an old driver's sense of superiority emerged spontaneously.
Of course, storytime after the joy is always inevitable.
Sniffing Anna's hair, Roland detailed the new news brought by the Taquila witch and his own guesses about the Battle of Divine Will.
"Although we knew for a long time that our place was only a corner of the mainland, I didn't expect that there were civilizations completely different from ours under the mountains... This world is really full of unknowns." Anna sighed, "Maybe one day, we will You can also set foot on that distant land to see what secrets the world across the sea hides.”
"There will definitely be that day, I promise," Roland replied with a smile.
Even if there is no way to go by sea, you can still fly over - the land that can be seen with a telescope is not too far away. With the internal combustion engine, large airships will be useful.
"However, is there really a god in this world? Leaving relics, prompting us to kill each other... Maybe it's watching us somewhere."
"Are you afraid?" Roland couldn't help clenching his arms and hugged her closer.
"No, I also want to thank it."
"Why?" He was slightly taken aback.
"Because it sent you to me." Anna raised her head and said softly.
Roland saw the blue lake light rippling in the other's eyes - that was her undisguised emotion.
He felt a heat flow in his heart.
"I will always be with you."
"But you can't always be by my side."
"I-"
He was just halfway through when Anna covered his mouth.
"You are the king and the commander-in-chief to fight against the devil army in the future, so how can you stay in Neverwinter all the time. I can't occupy all of you because of my own selfish desires. The soldiers fighting on the front line need to see you. Other cities The people of the world also hope that you can be with them." She said softly, "Roland, I am very satisfied to hear you tell me stories like this."
Roland was silent for a moment, "You are right, but no matter where I am in the future, you will be able to hear the stories I tell... I can guarantee that."
Anna blinked, as if she could hear the meaning of his words, "Don't rely on the Sigil of Listening?"
"That's right," he nodded.
If the love between the two is also conveyed through the listening talisman, how can it be spoken.
"How to do it?"
"Tomorrow you'll know," Roland rolled over and pressed Anna under him, then kissed her neck... Then she slid from the neck to the collarbone, leaving a light mark on the white and tight skin, "But now Well, it's time for me."
The two joined together again, and the sweet gasping sound echoed up and down, and it never dissipated for a long time.
…
After breakfast the next day, Roland walked into the backyard of Beipo Mountain with Anna in good spirits.
"Good morning, Your Majesty." Lucia had to come earlier, she put down her work and bowed to him.
"Good morning, His Majesty the King! Good morning, Sister Anna! Sister Nightingale!" Ling also followed her sister's appearance, bending over and shouting happily.
Roland smiled and waved his hands, indicating that the two of them did not need to be polite, then walked to the workbench, took out a piece of white paper, and drew a design drawing with a pen. He intends to take advantage of the time when the Taquila remnants have not moved to the West, to fulfill the promise made last night - a communication tool that can communicate with Anna at any time without requiring magic power.
That's a landline phone.
The principle of the telephone is very simple, but it is the most basic application of the electromagnetic induction phenomenon: the sound wave causes the metal reed in the microphone to vibrate, causing it to form a change in the magnetic flux in the magnetic field, and finally produce a large and small induced current. The earpiece, on the other hand, uses the electromagnetic coil to generate a large and small magnetic force, which makes the diaphragm vibrate and restores the current to sound.
In other words, it is not fundamentally different from generators and motors, but the latter turns vibration into rotation, and the power is much larger.
When he explained his conception and design plan, Ana immediately understood how this unprecedented communication tool works.
"I'm going to call Mystery Moon and Soraya over!" she said with bright eyes.
"Electric current... Swap with voice?" Nightingale was still at a loss after hearing this. She looked at Lucia as if she was trying to find a sense of identity, but found that the latter was thinking.
"Electricity and magnetism coexist, and magnetism is converted into force... So it is."
Even the little girl bell followed and said, "Sister, are you talking about the second chapter of the book "Elementary Physics"?"
Nightingale was immediately struck, and she grabbed a piece of dried fish in her heart, turned and fled into the mist.
Looking at this scene, Roland couldn't help laughing. Having said that, it's not that simple to get a phone with useful features, the problem is the signal transmission.
Electrical signals are attenuated.
This is also the reason why the phone has not been put into large-scale use since it was developed in the early days - once the distance is too long, it is difficult for the other end to hear what the other side is saying. It wasn't until the invention of the electronic tube that amplified electrical signals that it quickly gained popularity.
The electrical part is not Roland's strong point. The books he wrote at the beginning basically did not involve in this aspect. Now, even with the help of the dream world, he found that it was still quite troublesome to make electronic tubes.
Since you don't plan to amplify the signal, you can only start with reducing attenuation.
For example, increasing wire size and reducing route losses.
The former is very simple to implement. Anna's Black Fire can accurately process the required copper wire. According to the memory data, when using a wire with a diameter of four millimeters, it can maintain a non-relay communication of about 50 to 60 kilometers. The wire is only 0.4 to 0.6 mm. This is a bit wasteful, but it can effectively avoid the trouble of the signal amplifier.
The latter can use coaxial cable to achieve the purpose - the so-called coaxial cable is to wrap a layer of metal mesh around the wire, and the two are separated by insulating materials, making the metal mesh a Faraday cage, which can connect the electrical signal to the wire. Divergence is minimized. At the beginning of the popularization of telephony, the technology of wrapping the metal layer was not mature, so the coil was used at that time, that is, a coil sleeve wrapped in a spiral shape was placed on the wire to reduce signal loss. However, for Roland, there is no need to follow this rule. With Anna's processing ability and Soraya's special coating, it can be done in one step.