Bright Sword: Starting from the Improved Grenade

Zhao Tianyang found a specially fired ceramic rod and started wrapping it with nickel-chromium wire. Since it was his first time, he stopped after wrapping two or three times.

"Now all that's left is the buzzer and the generator."

Looking at the resistor in his hand, Zhao Tianyang decided to make the buzzer immediately.

A buzzer is an integrated electronic sounder powered by DC voltage and consists of an oscillator, an electromagnetic coil, a magnet, a metal vibration membrane, and a plastic shell.

Of course, Zhao Tianyang didn't have any of the above things, so he chose a simpler method to make them.

First, find an iron rod or iron bolt about 6 cm long, wrap a hundred turns of wire on it, leaving five centimeters at the bottom as the lead, then find a small wooden box and fix it on. This is the electromagnet.

The next step is to make the shrapnel. Get a thin iron sheet from anywhere, cut it into a long iron sheet 2 cm wide, bend it into a right angle, connect a lead of the electromagnet to the shrapnel, and then fix it to the small wooden box.

Finally, I found a thin wire, connected the other wire to it, and fixed it to the small wooden box.

Remember that the iron wire must be in contact with the shrapnel. Now the simple buzzer is ready. As long as the power is turned on, this simple buzzer will make a sound.

Looking at the buzzer in his hand, Zhao Tianyang stood up and prepared to find Cheng Mingsheng to ask him to quickly make the small generator.

As a result, I met Cheng Mingsheng as soon as I went out. He was holding a small wooden box with a handle on it.

"Director, this is a 6-volt, small hand-cranked generator I just made. What do you think of it?"

After Zhao Tianyang asked Shen Hong to make the wire drawing machine, he started to make the generator. It took him two days to make this low-tech thing.

"Just in time."

Zhao Tianyang took the generator, returned to the tent, and placed the resistors, light-emitting diodes, and buzzers he had made these days on the table and took a look.

"Oh my god, we're still missing an electrician for sending messages and an antenna for receiving messages!"

There was no other way, Zhao Tianyang could only put away the resistors, light-emitting diodes, and buzzers, and prepare to make the two missing items.

The first thing he did was to make an easier electric key. He found a piece of wood and nailed an iron nail on it. He also found a piece of iron sheet, bent one end of the iron sheet and nailed it to the wood.

Tie two ceramic pieces to the other end of the iron sheet that is raised up, press it to make sure the iron sheet can align with the iron nail, and the switch is ready.

Next is the antenna for receiving. This thing is a bit complicated. Generally, the antenna is made of metals with good conductivity such as copper, aluminum, and steel.

Zhao Tianyang thought about the materials in his hand, then went to the warehouse where supplies were temporarily stored and took some brass ingots.

Give them to Li Tie and ask him to beat the brass ingot into eight small copper rods 50 cm long and 3 cm wide, then bend one end into a paper clip shape and leave the other end unchanged.

Then he ran to find a long wooden stick and punched eight 3 cm holes on it. After Li Tie made the brass rod, he strung the eight small copper rods on it one by one, and the antenna was completed.

A day later, in Zhao Tianyang's tent, Liu Lao, Liu Guifu and others heard that the formal assembly of the radio transmitter would begin today, so they put down their work and ran to watch the fun.

Zhao Tianyang ignored them and looked at the resistors, light emitting diodes, buzzers, switches, antennas, batteries, and hand-cranked generators in front of him. He took a deep breath and began to connect them in series with wires without distraction.

Soon a transmitter and a receiver were assembled.

Connect the power supply, press the iron sheet on the switch, and a beeping sound will be heard.

The next moment, the light-emitting diode on the receiver next to it lit up immediately, and the buzzer made a clicking sound.

"Why does the sound of this radio sound different from what I usually hear?"

Cheng Mingsheng touched his head and asked puzzledly.

"That's because buzzers are made of iron sheets and thin iron wires. It's normal for them to be different from real buzzers."

Zhao Tianyang loosened the iron sheet on the electric key and explained to everyone happily.

"I can't believe it. A radio station with such high technological content was created just like that!"

Old Liu looked at the simple device on the wooden table in a daze.

"Yeah! It's like playing!"

Liu Guifu echoed.

In his impression, radios are all protected in plastic shells and look very sophisticated. However, the one made by Zhao Tianyang is simply terrible, like a beggar.

"Director, how far can this radio station transmit?"

After coming back to his senses, Mr. Liu asked excitedly.

“Well, I’m not sure yet.”

Zhao Tianyang touched his chin and thought: "But it should be about 2 kilometers. I will study it carefully later and try kilometers. kilometers is not impossible."

"Great!"

Mr. Liu's eyes turned red: "It's not easy! We finally have a radio to use!"

"Yes! Our entire Eighth Route Army only has 34 radios. Now we can build our own."

Liu Guifu exclaimed.

Just as everyone was happy about the successful production of the radio station, Yan'an also started a meeting about Zhao Tianyang.

"Everyone, take a look. This is a telegram sent by Mr. Liu."

The elegant man passed a telegram around to everyone.

"Comrade Liu Ding wants us to buy several tons of rubber and aluminum from the Soviet Union to build airships."

"airship?"

A man wearing glasses pushed up his glasses and said, "What's the use of that thing being a target for airplanes?"

"Comrade Liu Ding said that we should use airships to transport soldiers to Xinjiang to open mines. He said that all the mineral resources in the country are now owned by someone, so we should go to remote areas to look for new mineral deposits!"

A man who had just finished reading the telegram explained.

"Airship? Is that possible?"

The man with glasses asked doubtfully.

"It should be no problem. First of all, Xinjiang is far away from the war zone, and the local Kuomintang's power is not too strong. The Kuomintang's blockade of us is all on the ground. They would never think that we use airships to transport goods back and forth."

The elegant man agreed.

"Is this worthwhile?"

A man with an accent asked.

"Why can't I row it? The airship is flying in the sky, so it will consume some gasoline at most."

"I looked at their airship design drawings, but helium is a little difficult to deal with. However, helium is not like gasoline. It needs to be refilled every time it flies. A full charge can last for a long time."

The elegant man continued, "So, using an airship to transport goods only consumes some gasoline, and we can produce gasoline ourselves, so it's equivalent to no consumption."

"Hahaha, what a good one, no consumption."

The most imposing man in the room laughed and said, "I agree. No matter what, let's solve the problem of whether there is one or not first."

"Using airships to transport people to Xinjiang to look for minerals is a matter of whether there is a problem or not. Only when the problem is solved can we think about other things."

"agree."

"I agree."

Hearing this, everyone echoed.