The soldiers were very distressed and found that the results they had calculated were always the same as Cao Changjiu's, so they asked the reason.

Cao Changchang naturally took out a booklet - "Military Logarithmic Table", and when everyone saw it, they were all unconvinced, and strongly argued: We also use logarithmic tables, but why are you so fast.

Cao's answer: "I will carry it, naturally!"

The soldiers all looked disdainful, and one of them replied, "Rather there is a kind!"

Cao Changchang smiled: "Then don't fight, your pen is so slow, and when you calculate it, I don't know how many people have died in front of you." ”

The crowd was not convinced: What do you know as a child?

Cao was silent for a long time, just picked up the pen and easily wrote a large number of formulas to calculate the geodetic survey and artillery firing Zhuyuan, and the eyes of those small soldiers at that time were like aliens.

The name of the prodigy spread all over the barracks, and the little soldiers were generally not highly educated, so they let them open the altar and start hexagrams, not to teach them the tricks of calculation.

Of course, Cao Changjiu would not agree, it is one thing to calculate by himself, and it is another thing to teach these soldiers. He just promised to try to answer any questions he had, and promised to have time to make them something that didn't need to be calculated.

With this guarantee, the soldiers gave up, but kept urging them to do it quickly.

The artillery balance of China is imported, and a small part of it is calculated by hand, but how can the imported balance be taken seriously. How can the things that the great powers have calculated with real money give to you in vain, mistakes are inevitable, and the errors are extremely large. However, Huaxia did not have a supercomputer and could only rely on manual calculations, and often it took a year or two for a type of artillery shell to take shape.

Cao Changjiu had the idea of making a special shooting calculator in his heart since he found out that the artillery was still manually calculating the shooting yuan, so as to shorten the preparation time for shooting, but because there were no tools and materials, the things made must be extremely large and not in line with the aesthetic concept. However, the soldiers didn't follow, saying that if they didn't do it, they would start classes, and doing nothing was not enough for the buddies to be righteous.

A little kid and the soldiers have nothing to say, but Cao Changjiu couldn't stand their howling, so he had to sort out the inventory of electronic components with the help of the communication soldiers, hoping to find materials.

Those communication soldiers kept the radio station, and a large pile of spare parts and accessories were piled up in the warehouse, which was a paradise in Cao Changchang's opinion, because he could experiment with his own ideas and make some simple things, such as calculators.

Fortunately, there is no shortage of electronic components, and Cao Changchang wanted to modify the circuit diagram of the calculator he designed, and make a function calculator by himself with the materials of the communication class - a large number of waste electronic components and integrated circuits.

Cao Changjiu originally wanted to solidify the logarithmic operation on the circuit to realize, that is, to directly realize the logarithmic result with the circuit logic. The advantage of this approach is obvious, the physical circuit is extremely fast, but the reality does not allow it - the circuit will become extremely large.

Without a specially designed large-scale integrated circuit, it is impossible to achieve this optimized scheme, and Cao Changjiu had to choose a general scheme, which is an adder, and multiplication, division, etc. is realized through accumulation, which is naturally slow.

The principle of this scheme is that all mathematical operations are broken down into addition, for example, multiplication is accumulation. The principle is simple, so the circuit is not complicated to implement, but the speed is not as good as it could be.

Since it is all handmade, the appearance is unsightly, and the original model is like a big box, which is extremely clumsy. The circuit board was made by the soldiers according to Cao Changchang's circuit diagram using the soil method, and because there was no cost, all the wires were soldered by hand. The keyboard is handmade, that is, a wooden box plus a bunch of wooden pieces with letters and numbers written on the surface, and the output relies on LEDs (light-emitting diodes, the kind from n years ago), the most difficult to find is the memory, and after turning over a bunch of garbage, it is finally complete.

This machine can realize binary operation, pre-compile the variable equation, can realize the continuous input of various parameters, and directly produce the result, the disadvantage is that it takes two minutes for a result.

But this is enough to make the soldiers who have never seen the world crazy, you must know that with manual calculations and auxiliary logarithmic tables, even the top masters will be counted for more than ten minutes.

Now, with this machine, with a little training, a person can achieve a speed of 3 minutes to produce results, and the calculation of geodetic surveys and artillery firing elements is not a problem at all.

For a while, the name of Cao Banxian was widely spread, and the little soldiers were like a tide of sycophants, and they all had to explain the use of the method for a long time, and carefully recorded every operation step.

With Cao's long view, this thing is just an electronic experiment class in the university of his dreams, and it is not challenging at all. Moreover, at that time, Huaxia could already make its own desktop electronic calculators, but no one thought that it could be used in artillery in that closed-minded era.

And there is a problem with the connection of this Cao Changjiu's debut.,There are often problems.,Whether it's Cao Changchang or a small soldier.,The craftsmanship is rough.,In the end, it's the old military industry in the army that re-made it to run normally.。

In my dreams for a long time, designing computers has always been one of his special passions. The society in the dream is rich but spineless, and the research of science and technology has gone from chasing after all the people and daring to following closely with the ministries to simply giving up and only importing, and all the backbones seem to be broken one by one in the reform.

The reforms brought abundance, but the lack of experience deprived us of the basic hematopoietic function of science and technology. That's not as good as the old-timers.

The old military industry is from Hebei, and he usually doesn't make a sound, but his kung fu is first-class, and he can usually tinker with some strange things. Although he himself is not highly educated, he has a strong comprehension, especially in the field of radio.

At that time, the popularization and improvement of advanced science mainly depended on magazines, and each issue of Radio would publish some of the world's advanced science and technology reports and do-it-yourself articles, such as semiconductor radio.

The old military industry is fascinated by these things, but it is not just assembled step by step according to the article, with his skills, the article just opens a door for him, and the assembly is just a very simple thing.

As a result, a large number of small devices related to radios appeared in the hands of the old military industry, needless to say, the semiconductor radio made by himself, and each cadre in the regiment had one. The old military engineer also made a power amplifier by himself, which connected the radio and the loudspeaker, so that the amateur radio programs in the regiment were also enriched.