Transforming the current from the generator to a voltage suitable for lighting the bulb is obviously an extremely difficult problem to solve, but fortunately, Lotte still remembers the working principle of the transformer he learned in his previous life, and drew the drawings with the help of his memories.

Although the principle of the transformer is simple, there are bigger obstacles in front of Rakuten, and the current generated by the generator is how much power and how many watts are all problems that Lotte needs to solve urgently. Although Lotte knows that the voltage of the generator is positive with the number of turns of the coil, and the current is positive with the length of the coil, he is a layman after all, and he does not know the basic voltage function, so he cannot calculate the relationship between voltage, power and resistance.

Don't say it's Rakuten, it's a later generation of professionals who use local methods to horse, and it's extremely difficult to succeed, and the current Lotte can only be said to be in the verification stage.

After all, the basic scientific level of this era is too backward, and for the knowledge of electricity, Lotte can't even count half a bottle of vinegar. Even if Lotte hadn't told a few people that electricity cost people's lives, a group of people would still want to touch the wires when they are powered on.

Electric motors, light bulbs, everything is done in the local way, and the hope of success that is not standardized or standard can even be said to be a little slim.

There was no rush to test whether the light bulb could be successful, so Lotte first went to the steam engine production workshop to check it out, and now Lotte can make cement and steel bars, and it is not a problem to build a large house similar to a workshop in the future.

Lotte first looked at the first single-cylinder steam engine made the year before last, and although the single-cylinder technology developed at the beginning of the year had the lowest heat utilization rate, it was better than the mature technology, simple to manufacture, and its power was most suitable for ordinary boats such as painting boats.

The boat is now a pillar industry for profit, and has entered the stage of mass production, with seven of the first ten steam engines completed and three more being assembled. Of course, this is only for external sales, and it also has the Lotte plan for its own use, with a steam engine ship, there is no need to rely on the weather and wind direction and manpower to go to sea from Hangzhou in the future.

Now the slipway of the boat has also entered the countdown to completion, just waiting for the spring next year, the steam engine will be loaded into the boat, and after the completion of the test ship, it can be delivered, and then Lotte will begin to enter the second batch of sales reservations.

Inspected the first workshop, Lotte came to the second workshop, not yet to the workshop, then heard the roar of the steam engine, into the workshop, Lotte saw the recently developed three-cylinder three-expansion steam engine is running rapidly, although the three-cylinder steam engine has been successfully developed, but it has to carry out long-term durability operation, so as to find and solve problems at any time.

Three-cylinder steam engine single-cylinder steam engine is too complicated, the two are not the same in the manufacturing process, high heat utilization, high power, especially the closed water circulation system, is the best choice for long-term sea ship power.

This involves the great navigation business planned by Rakuten, and it is an indispensable weapon to open the era of great exploration.

In winter, it gets dark early, and when you first arrive, it is already half dark. At this time, it was also the best time to test the generator and light bulb, and at this moment, after someone was busy with the generator, it was time to enter the preparation stage before the test, and the Lotte and Bear stewards were also standing in front of them.

The ancients started work at dawn and worked at night.

At this time, it was dark, and it was time to get off work, and the craftsmen heard early in the morning that Lotte was going to visit the annex and test a lamp that could be lit without ignition.

Although the heart is a little incredulous, the intuition of these craftsmen tells them that there is nothing unsuccessful in what Le Hou Ye recognizes, no one would think that filling the furnace with charcoal to make the fire can turn the wheels, and it can also make the boat walk without being rowed in the water, all the unexpected have really come true.

Even in the eyes of the craftsmen, these people were still confident that the test lamp would be successful.

"Master Hou, can you start?" After everything was ready, Steward Xiong asked.

"Let's get started!" Lotte nodded.

The original prototype steam engine is used as the driving force, and the belt drive is used to drive the rotation of the motor, so that the rotor of the motor rotates at a high level, and the induced current is channeled into the light bulb through the wire. This time, Lotte did not test the transformer, because the carbon rod is not known how many times thicker than the filament in the previous life, so the transformer is not needed for the time being.

Lotte vaguely remembered that the world's earliest light bulbs in later generations used an electric current to produce light through platinum wires, but platinum, a metal that was not discovered like tungsten at this time in the Great Song Dynasty, Lotte retreated to the next best thing, using two carbon rods that were very close but not connected to connect the positive and negative poles of the current, and using the arc between the two carbon rods to illuminate.

To be precise, this kind of electric bubble, which is illuminated by the electric arc between the two carbon rods, is not the real electric bubble in the later sense, and it is more appropriate to call it an electric candle. As for the carbon sticks, Rakuten is made from graphite and clay based on memory, which was used to make Rakuten's pencil leads.

Lotte once thought that Edison had used carbonized bamboo fiber or carbon rod as a filament, but now he has not even figured out the most basic voltage, and the application of these two alternative filaments is simply a flash in the pan.

The reason why we want to build electric lights is to give everyone a hope, a hope that will modernize the Song Dynasty in later generations, electric lights, steam engines and ships...... These things that people in this era dare not think of have become facts, allowing those who know to make way for science, and ignorance to make way for Ming.

After getting Lotte's consent, Steward Xiong nodded to the group of test craftsmen, and under everyone's gaze, the steam engine was running, and at the same time, the generator was running rapidly.

At the same time, everyone turned their eyes on the light bulb, only to see the electric current from the generator meet the carbon rods in the light bulb, and the electric arc flashed between the two small carbon black carbon rods, and made a crackling sound, and then under the collision of the electric arc, the two carbon rods turned red and began to emit a light red light, as the motor was driven by the steam engine faster and faster, the light of the light bulb became brighter and brighter......

It worked!

Seeing the light bulb getting higher and higher, Lotte's face was full of excited smiles, and the craftsmen immediately cheered when they saw the bright light.

"Good ......"

"Even the moon in the autumn festival is ten times brighter, and it is not as bright as this electric lamp!"

……

A group of people looked at the lightbulb with the electricity on, shouting and talking.

Everyone looked at the thing that glowed dazzlingly at night, and the light emitted heat, shining warmly like a small sun in summer.

Energizing and shining, is a matter of optimism, but how long can it be lit is the most important issue, history in the early days of the invention of electric light, what troubled all inventors was the problem of filament durability.

A group of craftsmen looked at the electric light and discussed, even after the work did not leave, Lotte was counting the time in his heart, time passed bit by bit, I don't know how long it took, in the discussion and good of the craftsmen, the light bulb suddenly went out, and then the courtyard fell into darkness, and then there was a sigh of regret.

Ordered someone to stop the generator, someone brought a lamp and candle to illuminate, after the bulb was cold, Lotte checked it before, it was the carbon rod in the lamp that burned out, obviously the quality of the carbon rod was not very good, according to Lotte's estimate, the bulb was only lit for less than a quarter of an hour.

The electric light was broken, and the craftsmen sighed, and Lotte laughed with a group of people: "There is no success without failure, next time the carbon rod is thicker, it will definitely be brighter and ...... longer."

Although the electric light was not a complete success, it has really taught all the craftsmen today, and even when they are old, they can boast about it as a talking point to future generations.

Although this bulb has only been lit for more than a quarter of an hour, Lotte has already had a plan, through the immersive experience, the electric candle lamp with carbon rod as the wick is too bright, too much heat production is not very durable, not to mention ordinary people, even ordinary places can not be used.

Lotte heart Qingyang, can really be used as a practical bulb, or Edison used carbonized bamboo fiber to make filament bulbs, but before the transformer has not reached real maturity, it is obviously not realistic to use carbonized bamboo fiber to make filament.

To put it bluntly, the current technical level of electricity knowledge is still too low, and even Lotte is only in a state where it knows what it is, not to mention the craftsmen who have almost zero knowledge of electricity.

Obviously, limited to the level of chemistry and the knowledge of science, it is difficult for these craftsmen to reach the level of super craftsmen, so Lotte can only pin its hopes on the younger generation, and this year Lotte has recruited hundreds of students as last year.

In order to popularize science and technology, Lotte has set up a steam engine principle course and an electricity knowledge course for the first level students of the Pursuit of Knowledge College, both of which are taught by Lotte himself to the students in the college, and at the same time, the steam engine model and generator model can be operated in practice.

Boys are born with a strong sense of kindness and a strong ability to accept machines, and Lotte strives to bring these children down the path of science and train them to become scientists with the spirit of research and exploration. For this reason, Lotte is secretly observing those children who are curious and talented in science, and even spend more energy to cultivate these children as seeds.

In the past, 50,000 or 60,000 yuan of money was spent every year on the Quest Academy, the annex that manufactured steam engines, and the Grange that developed artillery, but now that the steam engine ships in the annex have begun to make profits, Lotte can expect that the money earned by the steam engine alone will be able to support the Questoshi Academy and the Grange that develops artillery.

The School of Knowledge is the cradle of science and technology in China, and it has an impact on the future of China.

With his scientific knowledge that is not even half a bottle of vinegar, at most he can only be regarded as giving these children an enlightenment education, and these children in the Knowledge Academy must rely on their own continuous efforts to become real scientific giants.

For this reason, Lotte sometimes thinks of the Roman Paul who went to Venice, and even in Lotte's eyes, the process of making glass is far less important than the philosophical ideas of ancient Greeks such as Archimedes. The benefits of introducing these Greek philosophies into the textbooks of the School of Knowledge need not be overstated.

The ancient Greeks studied the philosophy of the relationship between people and things, and it was this philosophy, which was different from Chinese philosophy and Indian philosophy, that became the guiding light for the scientific guidance of Westerners in later generations and the progress of human science.

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