In order to achieve the baby's desire to listen to stories on the phone, Yang Heng entered a very hard research stage.

"Big brother, what is this?" Because it is the baby's task, the baby has a lot of reason to do it with Yang Heng, so whenever the baby gets out of school, Yang Heng has a small tail next to him.

"Baby, don't move, this is a hand-cranked generator, that is, when the eldest brother shakes this thing, the baby will hear the bell." "Big brother, big brother, what does the bell look like." "Ringtone, it's the sound of ringing ring, ringing ringing." Naturally, this is the most primitive ringtone, and it will even be difficult to listen to, and there will be no ringtones like ringtones and songs in Yang Heng's previous life.

"Then, Suzu, Suzu, I'm going to take a look first." "Baby, this bell hasn't been made yet, or the baby and the eldest brother will make this hand-cranked generator, you see, just wrap the copper wire around this thing."

"Okay, okay, let the baby do it." The baby excitedly took over the work in Yang Heng's hands, Yang Heng believes that once the baby is proficient, it will even be better than Yang Heng to do, you must know that the baby's hands are small, Yang Heng's hands are big, there are some places, and it is really impossible to put the hands in, so it is okay to guide the baby to wind.

"Baby, when winding, you have to remember the number, draw it every ten circles, remember, you must draw it, otherwise you won't be able to do it well." Originally, Yang Heng wanted to make an automatic counting counter on the winding machine, but due to the unqualified gear, the counting winder was not made. You still need to use the number. Naturally, this orthography is the best way to count.

"Guys. Everyone, come and help Big Brother make a telephone, and then you will each have one in your room. This is the second day that the baby helped Yang Heng to work, and she actually encouraged all her friends, but it was also successful, but it was only seven children.

However, there are more children, and this speed is not much faster. On the contrary, it looks a little messy.

"Beibei, you wrap the line, I'll count you, you guys, you all find jobs to do." Do you still have a master for this, you actually started to divide the labor yourself.

"Brother Nian, put the knife down, how much strength can you have to do carving, and baby, you wind the thread yourself. Let Bei Bei do something else...... "But it's a big one and two big things for Yang Heng."

"Baby, you keep winding. You're more familiar, Brother Nian, you wait here, your task is to be responsible for cutting these papers, Beibei, you come, you use a knife to cut the shell of this earphone, Yiren, you come, you are responsible for winding this capacitor, remember to wrap it tightly, the number of turns is also here,......"

Soon, Yang Heng divided the work for the seven dolls, "Also, everyone pay attention, the supervisor should supervise their safety, and would rather be slow than hurt himself, and, during work, don't talk loudly, don't run around, each of them sits in their respective seats, if you remember, put the tools in a fixed position, and then get up." "This job is not the same as the usual play and study, Yang Heng naturally wants them to develop a good habit from an early age, it is impossible for them to do these things when they grow up, but to be a manager, they must also understand these things.

As for Yang Heng, at this time, he started his new production on the side, that is, to make an ohmmeter, this voltmeter is available, and naturally a resistance meter is needed.

But this thing is quite troublesome, the voltage can refer to the voltage drop of the ore, and the current has some references, maybe some coefficients of the wire can be determined, but the wire can be done very standard, the answer is no, so Yang Heng can only assume a value and then use this value as the standard to make an ammeter, with the ammeter, naturally the ohmmeter can be made quickly, but for a long time, the current and resistance are two inaccurate values, This can only be slowly improved after the technical conditions are reached.

Why does Yang Heng want to make these things, this is mainly because he wants to make a telephone, then there are two electronic accessories of resistance and capacitor, capacitor, Yang Heng has asked the children to start making, although it is not very accurate, but there is no way, this voltmeter ammeter, and even resistance meter is easy to do, but capacitance meter, it is not a simple thing, so for a period of time, Yang Heng will not make a capacitance meter, and what to do with capacitors, that can only produce all kinds of capacitors, to slowly test which one is the most suitable, Then you can use the voltage, ammeter to slowly compare, you will find the same or little difference in the capacitor, to say how to do the capacitor, the oldest way, paper or the thinnest silk cloth as the capacitor of the dielectric isolation layer, and the electrode is made of silver, which is also the most expensive component, but no way, at this time if you use other metals, it is not necessarily cheaper than using silver, this is a problem of metal processing.

Then there is the resistor, this thing is the simplest, and cheap, you only need to make some ceramic tubes, and then coat it with toner, and then add the toner, scrape, and a resistor is made.

And then there is the transformer, naturally, the core of the transformer is the same as the core of the generator, all of which are ordinary iron sheets made of iron sheets, brushed with tung oil, this is the iron core, although the loss is a little large, the efficiency is a little low, but this thing can be said to be the simplest thing, in fact, the most troublesome thing here is the use of tung oil, tung oil This thing is a kind of paint that can withstand high pressure after many tests and tests by Yang Heng, this high pressure, that is, the highest high voltage of more than 1,000 volts, No matter how high it is, it's not easy.

"Big brother, I'm done with my work, what are I going to do?" The baby began to ask for credit, indeed, her job is the simplest, that is, to finish the thread, and the other children are not as simple as her.

"Then you can help Brother Nian cut paper, cut cloth, or help become a safety supervisor."

…………

What the children do is just what they use, and at this time Yang Heng has arranged for a few female workers to come to learn, and later, the phone is done, then they are the masters of the factory, and Yang Heng is assembling at this time, verifying the practical ability of these things, first try the generator, there is a hand to shake, "Bell bell bell ......" Okay, yes, the bell rang, it seems that the effect of this ringing is there, that is, the effect of the moving film is also completed, but then the effect of the call.

Call, call, this, I didn't even make a microphone, what is the principle of the microphone This turned out to be a bottleneck, so okay, let me disassemble a microphone to try it, how to disassemble it.

Yang Heng sat up, and slowly began to recall the dismantling of the microphone in his previous life in his mind, this is the oldest microphone, slowly unscrewed the cover, there were a lot of charcoal grains in it, poured out the charcoal grains, and then exposed it to the sun, so the microphone returned to its original state.

Oh, this is an experience of repairing the microphone in my memory, and I don't know if I tried it myself or saw it from a book, but the process is still very clear, so, okay, just make charcoal grains right away, and see the effect of this charcoal grains.

To say that this way of using the change of resistance to change the size of the current is also the oldest way, but it is also a simple way, and the production of microphones that cut magnetic field lines to talk is quite troublesome, so Yang Heng should take this way first, and wait for him to train some technical personnel, and then let them study it slowly.

"Hey, baby, baby, I'm big brother, I'm big brother." "Big brother, the baby heard it, it's good, it's good." The baby shouted loudly over there, why, because Yang Heng just pulled two wires for the baby, and then connected a headset, so that the baby could not talk over there, so the baby could only yell to inform Yang Heng.

Well, this phone is considered a success, just waiting to be assembled, but this thing Yang Heng does not plan to popularize temporarily, mainly because this is too complicated, and the temporary technical personnel have not yet been completed, so there is still some trouble for maintenance, but it can be used for teaching first, this may be simple to say, but it has also taken Yang Heng more than three months, and at this time, the cable telegraph business has been popularized within a hundred miles around Chang'an City, and the number at the beginning is also ready to expand to four digits. Even in Chang'an City, there is already some breath of current words, that is, there are many electric poles and wires flying all over the sky. (To be continued......)