Tip 1: How to turn on the right keyboard
Tip 1: How to turn on the right keyboard
Num Pad, or, as it is also called, the right(digital) keyboard is undoubtedly very convenient to use. It often happens that for laptops containing short versions of input devices, they buy separately another numeric keypad, which is connected via a USB interface.
Instructions
1
If you have a regular full keyboard, then forTurn on the Num Pad by pressing the NumLock key, which is in the upper right corner. Usually, when the operating mode is switched on, the corresponding LED lights up, if any.
2
If you need to enable a removable digitalkeyboard that works via USB, connect it to the appropriate port on the motherboard of the computer or laptop. Install the device driver, if one is available. If not, use the hardware installation wizard in the computer's control panel.
3
Search for new computers connected to the computerdevices. Locate your NumPad keyboard, select the driver installation from the Internet, allow the wizard to connect to the network, and then install the software. Note that not all keyboards require the driver installation to work properly, sometimes it's quite simple to turn it on. Here everything can depend on the model of the computer and the installed operating system, as well as on the type of the input device itself.
4
Turn the device on by pressing the appropriate button on the case, if any. If not, just hit NumLock.
5
If you want to turn the Num Pad onshortened keyboard, make sure that this function is supported. Usually in this case on the keys to the right next to the letters are written also numbers. This mode is started by simultaneously pressing Fn + NumLk. At the same time, a corresponding icon should appear on the monitor screen.
6
If none of the above helps,contact the service center as it is possible that your keyboard is damaged. Preliminary check the correctness of the wiring and their safety.
Tip 2: How to turn on the LED
From year to year LEDs are increasingly used, they are beginning toactively used as a source of lighting. If there is a need to connect the LED light yourself, certain rules must be followed when performing this work.
You will need
- - multimeter (tester);
- - source of power;
Instructions
1
To connect the LED you need to know itcharacteristics. Typically, the LEDs are rated at 20 mA, the nominal voltage depends on the color of the glow. For red and yellow LEDs, this is 2 V (allowable range is 1.8 - 2.4 V). For white, green and blue 3 V (3 - 3.5 V). When connecting the LED, it is important to accurately set the current consumption - 20 mA. In this case, the LED will work properly for many years.
2
Before connecting the LED should be selectedsource of power. So, if for a white, green and blue LED two consecutive 1.5-volt battery batteries give a total of 3 V, then the required supply voltage should not exceed the maximum value of 3.5 V. But if with two batteries switch on red or yellow LED, it can just burn. That's why responsibly approach the choice of power source, make sure that the voltage on the LED does not exceed the allowable.
3
If the voltage exceeds the required voltage, the circuita quenching resistor must be included. For example, you want to connect a 2V LED to a 9V power supply. It turns out extra 7V. To extinguish them, you can determine from the formula R = U / I that the required resistance is 7 V / 0.02 A, or 350 Ohm .
4
Heat is released on the quenching resistor, so itmust have the necessary power. Calculate it according to the formula P = U * I. We substitute the data: 7 V * 0.02 A = 0.14 W. This means that you need a resistor of about 0.2 watts - it's better to take it with some margin.
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When using the LED is important in practicepick up current no higher than 20 mA. To do this, turn on the tester in a circuit break and check the current. If it is slightly less than 20 mA - for example, 17-18, then leave it that way. The LED will shine a little less brightly, but it will work very long. If the amperage is much lower or higher, adjust it by changing the resistance of the additional resistor.
6
Pay attention to the polarity of the connectionLED, improper connection can disable it. The anode is connected to the positive of the power source, the cathode to the negative. On the cathode side, a flat pad (cut) is made on the LED bulb. In addition, the cathode has a shorter terminal.
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If you want to feed an LED or a garland ofLEDs from the AC mains, then take care of rectifying the voltage. In the simplest case, a diode with a breakdown voltage of at least 400 V can be included in the circuit.
Tip 3: How to enable the numeric keypad
Using the additional or numeric keypadIt is convenient to use for filling numerical data of spreadsheets, calculating works on a software calculator, etc. In addition, the buttons of this keyboard can be used for navigation - moving the mouse pointer over the screen, inserting the cursor over the edited document, etc.
Instructions
1
The standard method of switching on and offThe numeric keypad is pressing the Num Lock key. Find it among the buttons in the upper right corner of the keyboard - a particular placement may vary on different models of this input device. On the activated state of the numeric keys, the LED indicates which should be marked with the same Num Lock designation. If it is not lit, press NumLock and the numeric keypad will turn on.
2
If before you used the functionMouse pointer control from the keyboard or activated it by accidentally pressing "hot keys", the buttons of the additional group of keys are configured to move the cursor around the screen. Return them to the old digital values by just pressing NumLock can not. In this case, disable the cursor control function with the same key combination to which it is activated - Alt + Shift + NumLock.
3
On laptop and netbook keyboards for economyPlaces the NumLock key is often removed, like the extra keyboard itself. In this case, the functions of the missing buttons are distributed over the keys of the main group, and switching is performed by pressing the Fn button in combination with one of the function buttons. Try the combination Fn + F11 - it is used for this purpose more often than others. If switching does not occur, please specify the required combination in the computer description.
4
If you turn on the computer each time you turn on the computer,The keyboard of the personal computer is inactive, change the corresponding setting in the BIOS settings. To do this, when you start the computer, enter the panel of the basic I / O system settings - press the Delete key. In your computer model, the BIOS setting button call button may be different - it should be indicated in the invitation letter that appears during the boot process.
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In the settings panel, find the Boot Up Num-Lock line in the Advanced BIOS Features section and set the On to this setting. Then exit the settings panel and save the changes.
