After breakfast, the three of them moved to the desk. Master Zhao explained the design principles to the two disciples based on the design drawings he had worked on overnight.

In fact, the disciples who were in charge of designing the structure had already figured it out in their heads. All Master Zhao could do was to remind them of some key points in design so as to avoid detours.

For example, it is best to add an appropriate amount of electrolyte to the water to enhance the conductivity of the water and speed up the reaction.

For example, the reaction rod inserted into the water should preferably be an inert electrode, such as a carbon rod, rather than a metal rod, because electrolysis is a strong redox reaction and metals will participate in the reaction.

And the carbon rod is best made into a hook shape, so that it is convenient for the bamboo tube to collect gas...

After listening to the key points introduced by the master, Zhao Shizhen and Zhang Jian spent an hour breaking down the sketch into parts drawings and giving the specifications of each part.

Looking at the pile of nearly standardized drawings in front of him, Master Zhao couldn't help but sigh secretly. Perhaps this is the difference between genius and mortal.

He became more determined to stop as much as possible in the future, and to hide his shortcomings so as to remain ignorant.

The head can be cut off and the blood can be shed, but Teacher Zhao’s glorious image cannot be lost!

~~

Mr. Zhao sent someone to the county last night to collect the relevant materials.

Fortunately, the materials needed were not rare. When they finished the drawings, Xiwa came to report that everything was ready.

They took the drawings and materials and went to Jiangnan Hospital, where they occupied a medical laboratory.

The first step is to make enameled wire. Only with enameled wire can the coil be wound to produce electromagnetic effect.

Enameled wire consists of conductor and insulation layer.

Most wires are made of copper, but Mr. Zhao couldn't find such thin copper wire at the moment.

Fortunately, the high-end embroidery of the Ming Dynasty used a lot of gold and silver thread fabrics. Therefore, even in Kunshan, there are shops specializing in making gold and silver threads, with gold, silver, round and flat threads available.

Mr. Zhao finally chose silver wire because silver has the best conductivity, not because he was reluctant to use gold wire.

As for the insulating layer, it is a bit more troublesome. Mr. Zhao has not yet lit up the technology tree of resin materials, so he can only use the oldest oil-based enameled wire... which is to repeatedly brush tung oil on the wire.

However, the wear resistance is too poor to be used directly for winding, and a good fine cotton yarn wrapping layer is required.

This is what Faraday used back then.

This is a delicate job. Not to mention Mr. Zhao, even the two inventors with dexterous hands couldn't do it well at the beginning.

Fortunately, we have the surgical genius Li Lunming. Director Li’s hands are three times more skillful than those of an embroiderer.

I saw him pull out the thin silver wire from the coil, quench it to soften it, and then use a fine-bristled brush smaller than a toothbrush to carefully paint the silver wire with tung oil paint.

The painted silver wire is then placed on a copper fire tray covered with a thick cloth to slowly dry.

After drying, brush it with tung oil again and dry it again. After three times, you can wrap it with cotton yarn.

~~

On the other side, the two inventors were also busy.

Zhang Jian was making a wooden box and a square wooden frame according to the drawings.

Zhao Shizhen disassembled several lead pen refills, crushed them together with bamboo charcoal, sieved them, and then used an appropriate amount of fish bladder glue as an adhesive to make a curved umbrella handle-shaped rod blank.

After drying, it is put into the boiler and roasted at high temperature for a long time to form a ceramic-like texture, which makes it suitable for use.

Fortunately, the hospital has a boiler room with bellows, otherwise it would be difficult to deal with.

~~

In the afternoon, the enameled wire was completed.

Under the command of Master Zhao, Li Lunming evenly wrapped the wire around the outside of the square wooden frame, with each turn being wrapped very tightly.

Zhao Hao took the wooden frame from him and nodded with satisfaction, "It's like a work of art. Director Li really has great craftsmanship."

"Can this thing generate electricity?" Li Lunming looked incredulous. He always thought that it was something that only Lei Gong and Dian Mu could do.

That is to say, if someone else told Master Zhao, who has already performed many miracles, that he could generate electricity with these crude things, he would definitely curse.

"I'll open your eyes now!" Zhao Hao gave an order, and Zhang Jian held a wooden box and placed it on the table.

Li Lunming saw that in the wooden box, there was an iron shaft with a crank, and a stone the size of a paperweight was tied to the iron shaft.

This is certainly not the best design, but it is the simplest verification design to make.

Time is life.

Zhang Jian took the wooden frame and put it into the box.

With a snap, it fit perfectly into the notch reserved on the inner wall of the wooden box... The craftsmanship of inventors in this era is really amazing.

You can’t become an inventor without skills.

Then he picked up a bowl of lard and used a brush to brush a layer of oil on the iron shaft and wooden holes for lubrication.

At the same time, Zhao Shizhen led out the two ends of the silver wire from the small holes reserved at both ends of the wooden frame and wrapped them around two carbon rods as thick as chopsticks.

"Draw the curtains!" Young Master Zhao ordered, and put on thick rubber gloves, his heart pounding with excitement. He thought to himself that he had not yet built a steam engine, but he had already built a generator.

"Shake it!" Zhao Hao ordered loudly.

Zhao Shizhen also wore gloves and slowly turned the crank of the iron shaft, and the stone tied to the iron shaft began to slowly turn.

"The time to witness a miracle has come!" In the dim room, Zhao Hao held up a carbon rod in one hand and slowly approached it.

Everyone widened their eyes and held their breath, not knowing what would happen next.

Just when the two carbon rods were only an inch apart, suddenly a blue spark was drawn between the tips of the two rods, scaring everyone present!

"Success!" Zhao Shizhen and Zhang Jian cheered.

But the two of them were not too excited, because at this moment they did not know what this arc of electricity meant to humans.

"Lightning!" Li Lunming fell to his knees, shocked beyond words: "Young Master actually created lightning!"

As he spoke, he actually bowed down to Zhao Hao and said, "No wonder you are so amazing, it turns out you are the God of Thunder who has descended to earth!"

"I'm still the Mother of Lightning. Get up quickly and don't embarrass yourself." Zhao Hao rolled his eyes and ignored him.

Because Mr. Zhao was in a very good mood at the moment, the world's first DC generator was born in his hands.

Sorry, Comrade Xiaofa. From now on, the unit of capacitance will be "Zhao"...

Uh, that sounds terrible. Never mind. Let’s talk about it later.

~~

After testing that the hand-cranked generator was working properly, Master Zhao struck while the iron was hot and asked the guards to open the curtains and bring in a water tank.

There was warm water in the jar. Master Zhao put on a mask and gave instructions from the side.

Zhang Jian carefully added Glauber's salt into it, and Zhao Shizhen stirred it slowly with a wooden stick.

Wait until sediment gradually appears in the water and the water temperature has completely cooled down, then scoop the water into a porcelain basin.

Then fix two carbon rods on a thin wooden board and put them into the basin with the big end facing down, just like fishing.

Then put two bamboo tubes on the two carbon hooks, put a pig bladder on the other end of each bamboo tube, and tie them tightly with a rope.

When the handle of the generator was shaken, a slight gurgling sound soon came from the bamboo tube, just like water boiling.

The two deflated pig bladders gradually filled up.

The one on the left obviously inflated much faster and produced a strong lift. If Zhao Hao hadn't held it down in time, it would have lifted the thin wooden board on the edge of the basin.

The master and his two disciples smiled happily, knowing that the electrolysis was also successful.

ps. Collect the names of the seven major units of measurement in the Ming Dynasty. Let's start with length today.

If you agree to continue using the current system of zhang, chi, and cun, please select 1. If you agree to change to the metric system, please select 2 (of course, it does not necessarily have to be called meters or centimeters).

The voting period is three days.

Sleepy.