How to connect the single-chip power indicator light
For the power indicator light of the single-chip computer, a conventional connection method was to connect the positive pole of the LED light to the 5V power supply, and the negative pole to the 1k current limiting resistance to the single-chip computer's IO-pin. At this time, when the IO-write 0, the light would be on, and when the IO-write 1, the light would be off. However, there was a drawback to this connection. Every time the single-chip computer lit up, the IO-pin had to output a large current of 10 to 20 microamperes, while the maximum output current of the ordinary single-chip computer IO-pin was only 20 microamperes, which would make the single-chip computer "very tired" and affect the stability of its internal work. In some projects, if you really want to drive it with the IO-pin, you can also add a latch or an inverse between the IO-pin and the direct load, so that the IO-pin provides logic, and the latch or inverse provides power. In addition, in the 51 single-chip computer, you can also read the status of the CPU's indicator lights through the SCF51, using the SSLID parameters 16#74 (16#19) to read all the indicator lights or 16#174 (16#119). Ordinary LED indicator lights can be connected to a 220V resistance (43 - 47K, 2W-3W resistance, the current is generally 5ma; the resistance connected to the bright LED indicator light is 110 - 150K, 1/2W, the current is generally 2ma), but the document does not specify the specific connection between this resistance and the single-chip power indicator light. Read more exciting novels for free
Double-line chip peak stock selection indicator
The dual-line chip peak stock selection index was a stock index based on technical analysis. By comprehensively analyzing the trading volume and price trend of the stock, it could find the high point of chip accumulation and provide stock selection suggestions for investors. The specific stock selection formula and principle needed further understanding. The information given so far was not enough to provide a detailed answer.
The indicator light of the single-lens reflex charger does not light up
If the indicator light of the DSLR charger does not light up, you can check it by following the steps below: 1. Power failure: First confirm whether there is a power failure. If there is a power failure, wait for the power supply to be restored. 2. Confirm if there is a problem with the socket: If there is no power failure, try another socket and see if the indicator light is on. 3. If the socket is fine, unplug the charger cable, reconnect it a few times, and take out the battery and put it back in. 4. Electric meter: Use a multi-meter to test the current of the charger and compare it with the value on the charger to see if the charger is really damaged. 5. Repair or replacement: If the camera is still under repair, it is recommended to replace or repair it first. If it can be replaced, it is best to replace it with a new one. 6. Go and get your own charger: If the guarantee period has passed, it is best to get a new charger. Repair is not recommended. 7. [Repair: If the charger cannot be replaced in the area, you can try to repair it, but it is easier to damage it again after repair.] In addition, Nikon cameras may have special circumstances. For example, the indicator light of the Nikon d610 charger may not light up, which may be a normal phenomenon; the indicator light of the Nikon d7500 charger may not light up due to a small defect in the metal sheet of the SD card or a problem with the format of the SD card; the indicator light of the Nikon charger suddenly does not light up, which may occur when the battery is in poor contact with the battery (equivalent to not installing the battery); the indicator light of the Nikon d7100 charger does not light up. You can refer to the situation where the indicator light of the Nikon d610 charger does not light up. When the Nikon d610 charger was not lit up and could not be charged, the charging position was shown on the camera as a trident icon on the USB port. It was sealed by a cushion and could be seen by digging the gap with a nail. It was usually on the side of the digital camera body, and a few were at the bottom. Some used the same port as the power supply. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Car oil change indicator light
When the oil level was lower than the lower mark L, the car would light up the alarm light to remind the owner that the oil needed to be changed. The principle of the oil indicator light was to calculate the service life of the oil according to the vehicle's driving range or time. When the predetermined maintenance range or time was reached, the oil indicator light would light up to remind the owner to change the oil. The specific prompt message to change the oil could be displayed on the dashboard, such as " Please change the oil quickly." The car owner could check the oil level by using the oil gauge. The method was very simple: after parking the car, open the hood, find the oil gauge, wipe it clean with a cloth, then insert it back. After waiting for three minutes, pull it out, and you can check the oil level. If the oil level is insufficient, the owner needs to replenish the oil as soon as possible to avoid damage to the engine. In short, when the oil level of the car was lower than the specified line, the oil indicator light would light up to remind the owner that the oil needed to be changed.
Will the power supply of the single-chip computer board burn out if it is short-circuited?
When the power supply of the single-chip computer board was short-circuited, it might burn the single-chip computer. If 3.3V and gnd were short-circuited, the tester would detect a buzzing sound. This did not necessarily mean a short-circuit, but it was possible. There were many condensers, microcontrollers, and possible interface chips between 3.3V and gnd. Any short circuit would cause a short circuit between 3.3V and gnd. During the inspection, the 3.3V related to the chip can be removed and measured again to see if the chip is short-circuited. If it is short-circuited, the chip can be disassembled to measure the resistance between the chip's 3.3V and the ground. You can also measure the voltage of the microchip by welding one of the feet of the microchip's voltage. If the voltage is still connected to the voltage, the microchip may be damaged. In this case, the microchip may need to be replaced. If you are using the smallest system board such as the K60, you can change your own single-chip computer or send it back to the manufacturer for replacement. In addition, pay attention to static electricity protection during welding, otherwise static electricity may break through the chip and cause damage. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Reason for the Damage of the Single-Chip Microprocessor
In a three-phase induction motor, many of the motor's damage is due to the electrical system, which may lead to the burning of the winding. The details are as follows: 1. The insulation of the motor is reduced; 2. The motor runs without phase; 3. The motor was overloaded. 4. Poor ventilation of the motor caused the temperature to be too high; 5. When the knife switch was used as the load switch, the motor was burned due to the power failure and forgetting to pull the brake. 6. Overvoltage or undervoltage operation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
An indicator of hemothinning
The indicators that reflected hemothinning were different in different situations: 1. In acute normovolumic hemothinning (ANH), there was no direct mention of specific indicators that reflected hemothinning. However, it was a process of collecting blood from the body and storing it for future use. At the same time, an equal volume of colloid solution or an isonotic crystalline solution was injected to supplement the blood volume to make the blood diluted appropriately. 2. In the blood hCG test, because the hCG concentration in the blood is particularly high, the blood needs to be diluted a certain number of times before the test is done. The normal reference value is related to the number of weeks of pregnancy, such as 3rd to 4th week of pregnancy 500 - 10000 IG/L, 4th to 5th week of pregnancy 1000 - 50000 IG/L, 5th to 6th week of pregnancy 10000 - 100000 IG/L, 6th to 8th week of pregnancy 15000 - 200000 IG/L. 10000 - 100000Iu/L in the second to third month of pregnancy. The normal reference value range of the blood thinning ratio and the corresponding week of pregnancy could reflect whether the blood was in a relatively "diluted" state. If the blood thinning ratio was inappropriate during the test or the final result was not within the reference value range of the corresponding week of pregnancy, it might mean that there was a problem with the blood thinning or other physiological abnormalities. 3. When fasting blood samples were taken to detect relevant indicators, drinking a large amount of water may dilute the blood and affect the measurement results of certain indicators, such as blood sugar, blood fat, liver function (some markers such as jumped), blood serum, blood Na, etc. These indicators had their specific ranges under normal circumstances. If the measurement value deviated from the normal range due to blood thinning, it could be inferred that the blood had been diluted. For example, if a healthy person's fasting blood sugar and blood fat levels had a normal range, if the blood sugar and blood fat levels measured after the blood was diluted were significantly lower than the lower limit of the normal range, it might indicate that the blood thinning had affected the test results. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Amazon e-book charging indicator light does not light up
If the charging light for Amazon's e-book (Kindle) didn't light up, it could be a device malfunction. Some users encountered a situation where the charging indicator light did not light up and the screen still showed that the battery was insufficient and could not be started after charging for 2 hours. The indicator light only lit up for a while after the charging cable was plugged in and out. In this case, you can try to do what a user does, pressing the switch for 30 seconds (some users press the switch for 15 seconds before the device reboots and the battery is full) to see if it can solve the problem. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Single-chip computer c language innovation tutorial
C Language for Single-Chip Microprocessors A single-chip computer was a small electronic device used to control and monitor various devices and systems. The C language was a common programming language used to write programs for single-chip processors. If you want to learn the C language, you first need to understand the basic principles and structure of the microchip. Then you need to learn the basic grammar and programming skills of the C language. Next, you can learn the instruction set and interrupt system of the microchip in order to write programs that can control and monitor the microchip. You can also expand your knowledge by learning about the memory and input and output ports of the single-chip computer. Finally, you can practice writing programs for the single-chip computer and try out different control and monitoring methods. Through practice, you can better understand the use of the C language and improve your programming skills. The single-chip C language innovation tutorial requires the comprehensive use of the basic principles of the single-chip computer, the basic grammar of the C language, the instruction set and interrupt system of the single-chip computer, and the practice of writing single-chip computer programs. Through learning and practice, you can become an excellent program developer and succeed in the electronic field.
How to connect the single-phase fan motor winding
For the single-phase fan motor winding connection, the first thing to do was to determine the main and auxiliary winding of the motor and the common wire. The resistance between the three wires of the motor could be measured by a Multimeter. Three different resistance values would be obtained. The two wires with the highest resistance value were the sum of the resistance values of the main and secondary winding, and the remaining wire was the common wire. Then, the common wire was used to measure the resistance of the main and secondary winding respectively. The lower the resistance, the main winding would be the main winding, and the higher the resistance, the secondary winding would be the secondary winding. If it was a three-wire motor, the resistance between the two could be measured by a Multimeter. The two wires with the largest resistance were connected to the capacity, and the remaining wire was connected to the neutral line of the power supply. Finally, the direction of the motor could be adjusted by connecting the live wire to any one of the two capacity wires. If it was a 5-wire motor, black and yellow would be a group, and red, white, and blue would be a group. The black and yellow wires were connected to the power supply, while the yellow wire was connected to the power supply. Red, white, and blue corresponded to the three speeds. Red corresponded to fast speed, white corresponded to medium speed, and blue corresponded to low speed. There was another method of connection: the live wire was divided into two paths, one path to the main winding and then back to the neutral line, and the other path to the secondary winding and back to zero. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Musk said that chip computing power will stagnate
Musk predicted at the Bosch Internet World 2024 conference that the current computing power growth had faced a bottleneck. By 2025, there would not be enough power to run all the chips, which implied that the computing power of the chips would stagnate. " When a programmer meets a psychologist " is equally exciting. Everyone is welcome to click to read it!