The breakfast at the hostel was lovely, a boiled egg, buns, porridge, pickles and fritters and soy milk. Pen, fun, pavilion www. biquge。 info Zhang Tao ate a boiled egg, drank a bowl of porridge and a few buns, and ate very much.

After breakfast, I sat in the restaurant for a while and digested the food in my stomach. I got on the bus and came to the Wujiaohua Building to purchase materials, and bought some gas resistors, bushings, fine copper wires, integrated modules, bakelites, a few copper sheets, small motors, small generators, some rare metal materials, soldering irons, and small drill bits.

After paying the money, he rented a set of equipment from the boss to make printed circuit boards, and the boss saw that Zhang Tao had bought so many expensive things, so Zhang Tao agreed after paying the deposit and using the fee. When leaving, the boss gave the phone number of the store, and the boss has an online store, so Zhang Tao can buy it at home in the future, and he won't buy it in the capital. In line with Zhang Tao's wishes, these materials cannot be bought in his hometown city. After going out, I went to the electronics mall and bought a remote-controlled helicopter, two MP4s and two miniature HD cameras, and put my things in two large duffel bags and returned to the hotel.

Because the copper sheet is to be cut and drilled, the sound is relatively loud, Zhang Tao and the boss discussed to give 100 yuan a day to move to the back of the house with a yard to live, the boss knew that after looking at the small cutting gear and small drilling machine rented by Zhang Tao, he also agreed, and took a fire extinguisher and said how to use it and lent it to Zhang Tao, Zhang Tao thanked the boss for a while, and moved the luggage and test equipment to the backyard room.

Zhang Tao first drew the circuit diagram on paper, then connected the power supply to the yard, and took out the small cutting machine and drilling machine to connect to the power supply. According to the circuit diagram on the drawing, the copper sheet is cut into some long strips of small copper sheets of different shapes, and the numbers are written on the copper sheet with a carbon pen and then drilled with a drilling machine. After getting back the deposit, I went to another store to buy a bottle of sulfuric acid, fluorite, a few beakers, test tubes and acid-base thermometers, and after going out, I took a car to the market to buy a raincoat, a hat, thickened rubber gloves and a bag of disposable masks, and went to the farmers' market to buy a matsutake mushroom and a monkey head, and returned to the hotel.

When he returned to the inn, it was already dark and he told the innkeeper that he had sent the cutting and drilling equipment away, and the innkeeper was also very happy.

After waking up the next morning, I practiced a set of eight-dan Jin Qigong in the small courtyard, and after playing Qigong, I saw the innkeeper standing with a smile on his face.

"Boss Li! Morning! Zhang Tao said hello.

"Morning! Lad! Hit the eight dan brocade! Boss Li said with a smile.

"Huh! Boss Li will also be Baduanjin! Zhang Tao said with a smile.

"I sometimes do a little bit of Baduanjin in the morning! Nowadays, young people rarely know how to play Baduanjin! However, the eight sections of Jinyang Qi are too much! You still have to practice Tai Chi! Boss Li said.

"Huh! Is it! It makes sense! Shaolin Baduan Jin! Wudang Taijiquan! Zhang Tao said with a smile.

"Young man! Let's eat! Boss Li said to Zhang Tao with a smile

"Let's go!" Zhang Tao said and walked towards the restaurant with Boss Li.

Zhang Tao returned to the room after breakfast, took out some of the materials in the gas resistor, took out some of the materials in it, and rubbed some powder with a file after taking a few rare metal pieces, and did not file enough metal powder until noon.

After lunch, I slept for a while and then did the experiment. In order to ensure the purity of the silicon wafer, first configure hydrofluoric acid, grind some fluorite into powder and pour it into a plastic cup, then put on a raincoat, a hat and protective goggles, put on a three-layer mask and then put on thick rubber gloves, put sulfuric acid into the thick plastic cup, immediately cover the lid, and shake it a few times.

With the left hand, hold the plastic tape pliers and pinch the silicon wafer, open the lid containing hydrofluoric acid with the right hand, and gently brush the silicon wafer with a plastic brush a few times. Open two bags of baking soda into a plastic bucket and fill it with water, then pour hydrofluoric acid into it, dilute it, neutralize it, and pour it down the drain.

After the silicon wafer has been left for a long time, there will be an oxide layer, and it is relatively simple to clean it with hydrofluoric acid. However, hydrofluoric acid is very corrosive, Zhang Tao tried his best to protect it, and after diluting hydrofluoric acid, his tense mind relaxed.

Zhang Tao took off his clothes, took off his raincoat, hat, protective goggles, gloves, put them in a large basin and soaked them in water, and put a bag of baking soda in the large basin. I took a glass of water and rinsed my mouth and face, and went to the window to breathe the air outside the window.

After changing another set of clothes, washing the clothes and raincoats, etc., and drying them in the yard, then connect the power supply to the yard, fix the processed copper sheet on the bakelite board with a soldering iron and solder wire, turn over the bakelite board after fixing, and drill through the holes on the copper sheet with a fine drill.

Several modified gas resistors, silicon wafers, integrated module CPUs and memories are soldered to the circuit board with soldering irons and solder wires, and then the walkie-talkie is disassembled, and the circuit board inside is taken out and replaced with the circuit board made by yourself.

Then transform the MP4 and install it in front of the walkie-talkie as a display screen. Attach the antenna of the walkie-talkie. Turn on the power of the walkie-talkie, adjust the FM knob to the position of number 1 and press the button on the left side of the walkie-talkie, and the walkie-talkie "Drop!" There was a crossover between the X axis and the Y axis, and there was an H line showing the height in the middle. A small red dot appears in the four-quadrant on the MP4 screen. It is the matsutake mushroom in the direction of the house.

A small green dot appears at 0 o'clock on the X and Y axes in the center of the screen, moving with its own movement.

Then turn the FM knob of the walkie-talkie to the position of the number 2, and a small blue dot appears on the MP4 screen at the position of the small red dot, which should be the monkey's head next to the matsutake mushroom in the room. Zhang Tao walked to the room with the walkie-talkie, and watched the small green dot on the MP4 screen also move towards the location of the room.

When I went to the room, I put the walkie-talkie on the table, picked up the matsutake mushroom and the monkey head and walked around the house, only to see the small red dots and small blue dots on the walkie-talkie MP4 also moving with me. The small green dot at 0 o'clock does not move. After doing the test, Zhang Tao determined that the detectors for matsutake and monkey head were ready! In addition, matsutake and monkey head can be detected together, and the newly made detector is also small.

When the time comes, it will be even easier to go up the mountain to pick matsutake mushrooms and monkey heads! I tested the maximum detection distance again, turned on the camera function of the mobile phone, and the camera of the mobile phone was pointed at the screen of the detector. Picked up the matsutake mushroom and monkey head and walked out of the hotel for about 3,000 meters, then walked back, and when I returned to the hotel, I looked at the video on my mobile phone.

On the video, about 2 kilometers after Zhang Tao walked out of the hotel, the small red dots and small blue dots on the detector screen disappeared. It may be that there will be interference in the detection of two mushroom instruments, and the detection diameter of the detector is less than half of the original mushroom detector, and the next step is to increase the detection of long-distance research.

Zhang Tao went to the flower, bird and fish market to buy a male king butterfly and a British mouse, and continued his research after returning to the hotel. In the next few days, Zhang Tao sometimes did research in the hotel, and sometimes went to the alley to help Zhou Daming set up a stall.