Jumper?

Mai Dong frowned, she is not an electrical major, speaking of jumpers, the first thing she thought of was a critical moment in Hollywood movies, the male or female protagonist smashed open the center console of the car, and pulled out two thin wires casually, and the car engine started with a pair of fires.

This is to use the instantaneous current when shorted to start the car engine, is there such a simple way to start the space station computer?

"Listen to me! Girl! ”

"Okay."

Tang Yue stared closely at the circuit diagram on the monitor, the screens on both sides of him were the schematic diagram and block diagram of the power distribution system of the core module of the joint space station at the same time, and the old cat even found the assembly diagram for him, the cat knelt on the table, poked his head out from behind the computer monitor, and held the third screen in his hand.

Tang Yue held the pen on the manuscript paper and quickly wrote and drawn, the tip of the pen rubbed against the paper to make a rustling sound, Tang Yue's forehead was drenched in cold sweat, although this kind of analysis is his old job, but the power distribution system of the space station is more complex than he imagined, since graduating from university, Tang Yue has not touched such a basic operation for many years, even in ground training and daily work, he does not need to disassemble the entire core module.

There is no EDA software in Kunlun Station, so you can only use pen and paper.

“IC780…… IC780…… Amplifiers, transistors? Yes, it's a transistor, one two three four five six unit circuits, STO5347 oscillator...... Is this an open leak or an open set? I'll have to see if it's driven by an external circuit, and it has nothing to do with the inside of the IC - the high level is controlled with low-level logic...... Total inverter! Frequency conversion! Inverter inverter, inverter, damn inverter! ”

Tang Yue turned back into the student who was anxious about the test papers in the examination room overnight.

Calm Calm Calm Calm Calm I've seen this thing before!

Calm down!

Tang Yue's heart rate was rising wildly, and his hand holding the pen couldn't stop shaking.

It's like your flight is about to crash, and someone throws you a huge problem with advanced math that you need to solve in five minutes, and the plane can be saved.

Beads of sweat the size of beans slid down Tang Yue's cheeks.

Mai Dong was still waiting for his instructions.

The old cat's head rested on the top of the monitor, and a pair of cat's eyes condescendingly overlooked Tang Yue's work.

"Pin 13 of the TC88604 because it's a time-varying element." The old cat said coldly.

Tang Yue was stunned for a moment.

"You know this?"

"Not like you." The old cat tilted his head and held up the monitor, "I know a little bit about it." ”

"Good!" Tang Yue pushed the pile of manuscript paper on the left hand side, "Help me find a way to excite the voltage source USP7540!" Don't break Kirchhoff's law. ”

The old cat freed up one paw to pick up the manuscript paper, which was drawn with messy wiring, and the old cat slowly squinted his eyes.

"Oh...... You gave me the hardest part, didn't you? It's a nonlinear time-varying thing, and I need to solve a long, long, long nonhomogeneous linear differential equation. ”

"Then you can solve it quickly!"

"It's been solved." The old cat moved his neck, picked up the pen from the table, and wrote down the answer unhurriedly, "Give." ”

"Girl!" Tang Yue threw away the pen in his hand and jumped up with the final result, "Girl! Can the girl hear me? Girl? ”

Hell, this half-duplex dialogue system doesn't allow both sides to talk at the same time, and one person can only listen while the other person speaks.

"Girl, girl, girl, girl, answer the phone...... Answer my call......"

After Tang Yue finished speaking, he could only wait anxiously for the other party's response.

"Tang Yue?"

“OK！ Listen carefully to me, girl, I'll show you how to restart the computer! Tang Yue stared at the scratch paper in his hand, "Under the current conditions, it is impossible to restart the computer directly, or I haven't found a way yet, but we can start it indirectly...... Start the computer with a short-circuit overload protector. ”

"Overload protector?" Mai Dong held up the flashlight, a little dazed, she didn't understand electricity.

"Yes!" Tang Yue said, "The overload protector has the right to turn off or turn on some modules of the computer - when it detects that the current in some characteristic circuits exceeds the threshold, in order to protect the computer from being burned by abnormal current, the protector will turn off the corresponding module and perform a self-test at the same time!" During this process, it will reboot the system computer! ”

"But how do we know the protector is still working?" Mai Dong looked around, covering his mouth and nose with one hand, and it was pitch black all around, "And the cabin has been completely powered off...... Does it still work? ”

"The protector doesn't need a power source."

Mai Dong was a little surprised, "Don't need a power supply?" ”

"Yes, an overload protector is just an air switch or a fuse or something like that, it doesn't rely on circuit control, it relies on the physical properties of the material itself! The Hall effect comes into play in the overload protector, and as long as the current flowing through exceeds a threshold, then the protector itself creates a sufficient potential difference. Tang Yue explained, "This slight potential difference triggers the underlying Reset switch in the computer - this is a simple and crisp response like the knee jump reflex, which is very reliable!" ”

"Understood." Mai Dong said.

"As a first step, we need to make sure that the computer itself is not disconnected from power." Tang Yue gave an order.

Whatever method they use to restart the computer, they must ensure that the computer itself is powered and cannot be physically isolated from the battery - the United Space Station was hit by Orion, and the solar panels were basically destroyed, and even if there are some remnants, they will certainly not be usable now, but fortunately, the core module itself has not been damaged, which indicates that there is a high probability that the computer chassis and battery will survive.

"Mai Dong, is the sub-panel still there?"

Mai Dong turned his head, "It's still ...... It's just a little crooked. ”

"Okay, listen to me, the switches in the second row on the sub-panel are marked with 'PIN-B', a total of three black switches, and pull them all to 2nd gear."

Mai Dong did as he said and pushed all the switches up.

"The switches marked 'PIN-C' in the third row are all pulled to second gear."

Mai Dong pushed the switches up one by one.

"Tang Yue, the green light is on."

"Very good, that means there's still power in the battery!" Tang Yue clenched his fists, "I have designed four ways to jumper the computer to restart the computer, and we will try them one by one." ”

Mai Dong nodded, she bit the flashlight in her mouth, and began to clean up the wires exposed after the damage of the computer's main control instrument, there were two or three wires in each hole, different colors, they were supposed to be connected to different switches or valves, but now they were all knotted.

"Find the white wire labeled 'H.D.' and it should be on the far left of the first row."

Mai Dong approached and searched carefully, the cables were only a millimeter or two thick, and it was difficult for Mai Dong to read the handwriting on them in the smoky core cabin.

"White?" Mai Dong coughed again as he spoke, "Tang...... Tang Yue? ”

"Yes, white."

"I found it." Mai Dong replied, "White H.D. wire." ”

"Found the red wire marked with the letter 'P' and it was in the second row."

"Letters...... Letter P...... The red wire ...... "Mai Dong coughed violently, and the flashlight in his hand was almost unable to hold it, Tang Yue heard a violent cough and wheezing sound in the channel, and his heart couldn't help but pinch it.

"Girl? Are you okay? ”

"I didn't ...... It's okay. The girl shook her head, "I found this wire." ”

"Two wires are shorted."

Mai Dong tilted his head to clamp the flashlight, bit off the insulating rubber on the outer layer of the wire with his teeth, and then wrapped the two wires together.

Tang Yue...... The green light on the sub-meter came on. ”

"Well done...... Tang Yue stared at the circuit diagram on the scratch paper, "Well done girl, next find the red wire marked 'H.D.', be careful not to find the wrong one, this time it's red!" ”

"It's on the edge of the white line, I see it."

"Now turn the switch in the center of the second row of the sub-meter to 1st gear, and then short the white and red lines marked H.D.!" Tang Yue said that this is the most effective reboot method he can come up with, artificially creating a short-circuit current to trigger the overload protector, which will activate the computer's Reset switch.

Mai Dong pressed the two wires together.

"How?" Tang Yue's heart hung in the air.

"Nothing happened." Mai Dong turned his head to look, and the space station was still dark, and there was no movement.

Tang Yue's heart sank.

"Try again, separate the two wires, and short again...... Try again. ”

Mai Dong grabbed a wire with one hand and touched them gently, and at the moment of contact, a small spark burst out from the inner core of the wire.

Immediately after that, a buzzing sound sounded in Mai Dong's ears, something was activated, the sound changed from small to loud, and soon its sound was heard in all directions, the girl raised her head, the lights on the bulkhead were lit one by one, and the undamaged displays were also lit up one by one, and the core cabin lit up one by one from beginning to end, and the crystal cabin returned to light.