1. No. The cylinder below the lamp is the electronic ballast, ballast is the fluorescent lamp on the current limiting effect and the generation of instantaneous high voltage equipment, fluorescent lamp removal ballast is not dangerous, but the ballast lamp can not be used, if it is LED fluorescent lamp, you can not install the ballast.
2, the ballast is in the lamp frame under the lamp tube, open it and see it. Note: Change the lamp to replace the ballast must be power off. Otherwise, electric shock risk.
3, this is the glow starter, used to generate glow discharge instantaneously, is the pointNecessary steps for lighting the lamp. Of course, most of them now use electronic ballasts, no longer use glow starters. The instantaneous high voltage generated by the starter, which still has some damage to the lamp, will accelerate the aging of the lamp. The general voltage is 220V.
4, there is a black cylinder below the lamp tube starter. According to the query, the lamp starter is composed of a neon bubble and a small capacitor equipped with a stationary contact plate and a moving contact plate made of a hot bimetal plate.
5, scientific inventions small production - fluorescent lamp cleaner in the room cleaning, the most difficult to).
2, this is the logo, also called the guide symbol, you click it, it will guide you to go there.
3, minimize, maximize, close. Three buttons in the top right corner of the title bar of a standard windows operating system provide convenient window management functions, including minimize, maximize, and close. These buttons are also one of the iconic designs of the windows operating system and have become one of the classic interface elements of the windows operating system.
4. In the upper right corner of the title bar of the windows operating system window, there are three buttons that are the smallestInitialize button, restore button, maximize button. Minimize the button to turn the window into an icon and display it on the taskbar. Restore button to restore the minimized and maximized window to its original size. The Restore button is displayed after it is maximized. The Maximize button turns the window into a full desktop area and the Maximize button into a Restore button.
5, minimize window button, restore window button, close window button. According to the public information related to the query, the Minimize window button is to shrink the window to the taskbar, rather than close the window, and the restore window button is to switch the window to maximize or restore the original size modeThe Close Window button closes the window and terminates the related program or task.
Capacity range: the mainstream 18650 battery capacity from 1800mAh to 2600mAh, power battery more than 2200~2600mAh, there are also more than 3500 or 4000mAh standard. No-load voltage standard: It is generally believed that the lithium battery no-load voltage is below 0V and the power is used up (the specific value depends on the battery protection board, such as 8V or 2V).
0 Lithium battery parametersThe main parameters of the 18650 lithium battery include: voltage, capacity, internal resistance, size and shape. Among them, the voltage is generally 7V, the capacity is usually between 2000mAh and 3500mAh, the internal resistance is small to ensure the battery performance, and the size is about 18mm in diameter and 65mm in length.
The 18650 battery size standard is 18 mm in diameter and 65 mm in length. The nominal voltage of the 18650 nickel-metal hydride battery is usually 2V, and the common capacity is about 4500MAH. The 18650 lithium-ion battery has a nominal voltage of 6V to 7V, and the common capacity range is1500MAH to 2600MAH, the current maximum capacity up to 3000MAH.
size is 10±0.2mm in diameter, 60±0.5mm in height, capacity between 2000mAh and 3400mAh, internal resistance is less than 80mQ, charging conditions are 20℃±5℃, standard charging current to 2V, fast charging to 2V after the current is less than 20mA. The recommended temperature for use is 15-35 ° C, humidity is 45-75%, and atmospheric pressure is 86-106kPa. Chemical performance parameters: no crack, scratch, deformation, stain, electrolyte leakageDew.
The first is the NumLock indicator, which is controlled by the NumLock key on the keyboard. The second is the CapsLock indicator, which is controlled by the CapsLock key on the keyboard. The third is the ScrollLock indicator. The fourth is the windows Key lock indicator, which is controlled by the Fn key windows key on the keyboard.
Respectively power indicator, charging indicator, hard disk indicator, wireless mode indicator, digital keypad indicator and case indicator.
Power status indicator When the laptop is turned on, the power status indicator will light up and blink slowly when the laptop is in sleep mode. When the laptop is shut down or goes into sleep mode, the power status indicator goes off. The battery charging indicator power is between 95% and 100% (connected to the external power supply). The power is lower than 95% (connected to the external power supply) orange constant bright.
Mechanical keyboardWhat is the meaning of the n.c.s indicator on the numeric keypad area, press the Num Lock key to control, on: The numeric keypad area can be used, off: the numeric keypad area cannot be used. Light C: Case control key, press the Caps Lock key to control. On: Uppercase letters are entered on the keyboard. Off: lowercase letters are entered on the keyboard.
1, check the battery packaging: most batteries will be marked on the package battery model and number.The model number is usually a string of letters and numbers (e.g. AA, AAA, C, D, etc.), while the number indicates the specification and capacity of the battery. Check the battery's own logo: Some batteries have model and specification information engraved on the battery body. You can carefully look at the positives and negatives or the side of the battery, and sometimes you can find identification information.
2, first of all, you can directly view the battery itself. Many batteries have information about the model, voltage, capacity, etc. printed on their housing, which is usually presented in standardized codes or abbreviations. For example, common types AA, AAA, C, D, etcThe number is named after the size of the battery. Secondly, if the battery itself is not marked with the model, you can check the outer packaging or manual of the battery.
3, first of all can be distinguished from the shape of the size, the fifth battery is larger than the seventh battery. The No. 5 battery has a diameter of 14mm and a height of 49mm, while the No. 7 battery has a diameter of 10mm and a height of 44mm. It can be distinguished from the packaging, the fifth battery will be marked AA, and the seventh battery will be marked AAA. It can be distinguished from the battery capacity, the capacity of the fifth battery is larger than that of the seventh battery.
4, No. Battery English code is D,The number 2 battery is code-named C, the number 5 battery is code-named AA, and the number 7 battery is code-named AAA, and the battery identification of these several models can be seen on the battery packaging. The capacity of the battery is differentiated by the capacity of the No. 1 battery, followed by the No. 2 battery, and the capacity of the No. 5 battery is larger than the capacity of the No. 7 battery and smaller than the capacity of the No. 2 battery.
5, look at the size: household batteries are usually 3 kinds, the smallest is No. 7, the middle is No. 5, the largest is No. 2.
6. Take the national standard battery model 6-QAW-54A as an example. 6 refers to the composition of 6 single batteries, eachThe voltage of a single battery is 2V, that is, the rated voltage is 12V. Q represents the use of the battery, Q represents the car starting battery, M represents the motorcycle battery, JC represents the Marine battery, HK represents the aviation battery, D represents the electric vehicle battery, F represents the valve-controlled battery.
Letter case status indicator: This light is on when the capitalization function is enabled, and will be off when the capitalization function is turned off.
Indicates the power indicator, charging indicator, hard disk indicator, wireless mode indicator, digital keypad indicator, and upper and lower case indicator.
From the picture, the indicators from left to right are: Power indicator: When the laptop is started, the power indicator will light up. Blink slowly as the laptop goes into sleep mode. When the laptop is powered off or in sleep mode, the power indicator goes off. Charging status indicator: orange when charging, full is green.
refers to the power indicator, the charging indicator, and the hard diskIndicator light, flight mode indicator and case indicator.
There are five indicators below the touchpad. From left to right, they are power on, Battery usage, hard disk, wireless LAN, and Caps Lock. As shown in the figure above, the five indicators represent: lamp icon: power indicator. Rechargeable battery icon: battery charging indicator. Cylinder icon: hard drive read indicator. Wireless icon: Wireless/Bluetooth indicator. Caps lock.
What is the meaning of the n.c.s indicator light on the mechanical keyboard? Light N: NumLock key is used to control the numeric keyboard areaOn: The numeric keypad area is available. Off: The numeric keypad area is not available. Light C: Case control key, press the Caps Lock key to control. On: Uppercase letters are entered on the keyboard. Off: lowercase letters are entered on the keyboard.