How to make the keyboard backlight on a laptop

In modern notebook models, the keyboard backlight option is already available, which is convenient for operation. This is especially true for people who have to work in the dark or for those who like to sit at a laptop at night. When the backlight is working, you do not need to strain your eyes in order to consider a certain sign on the buttons. There are several options to turn on the backlight, the differences are only in the models or the manufacturer. You can also do the keypad lighting yourself.

Materials and tools

The first step is to prepare materials and tools. For the work will require:

  • soldering iron;
  • diode strip;
  • power cord;
  • battery cells (if built-in lights are made);
  • screwdriver;
  • adapter with 2/4-pin to 1/6-pin;
  • switch;
  • insulating tape;
  • glue (for certain devices with a collapsible keyboard panel);
  • sharp knife;
  • tester to test the operation of the entire circuit of the electrical circuit.

Reference! Almost all the necessary tools and accessories, if required, can be purchased at an electrical goods store. This also applies to diode blades for multi-color illumination.

Important points before work

To solve the problem with the backlight buttons on the keyboard, you need to buy a diode tape. Standard options for LED paintings can be purchased at any hardware store or on the market. If the conditions of the created project for lighting require some special conditions or parameters, similar options can be searched on the Internet.

As a rule, LED canvas consists of:

  • installed LEDs that are connected in series;
  • polymer flexible tape;
  • division sites, marked with a special marking;
  • sections of the output elements for connecting to the power supply.

In the case of the Multi-color diode pattern, there are certain differences. A pair of diodes of different colors are connected in parallel at a short distance. But all other sites of soldering (connection) are standard.

Reference! Taking into account the marking on one output is 5 V, on the other - 12 V. It is necessary to remember that when connecting the lighting circuit to the terminals. In this case, during the option of connecting the web with the help of the charger, it is necessary to take into account that the charging of the laptop should not be pulsed, only transformer.

Backlight for keyboard on a laptop: step by step

To organize the external illumination of the laptop keyboard, you will need 5 Volt power from the USB port and a white diode. We connect to the connector for power from the USB-port. But we must not forget that the diode has a voltage of 3.5 volts, and the current indicator is 0.02 Ampere, that is, a 1.5 V rejection resistor is required, its resistance is 1.5 V / 0.02 A, which is 75 Ohms .

Since the USB port produces a current of 0.5 A, then, accordingly, 25 diode lamps can be connected to it, but it is necessary to control the current consumed by the diodes, the main reason is that the difference in 17-21 mA significantly reduces the diode operation time .

Having checked the collected external illumination and the power of the light beam, if necessary, increase the brightness of the light, you can additionally connect in parallel a number of diodes with the installation of the same resistor. The required current consumption is set using the selection of resistors.

So the external lighting of the keyboard is ready, you can fix it in the right place and start working on a laptop.

Interior lighting

The most common question is how to connect keyboard lighting in Asus devices. Since these laptops have not very bright glow. Many users are not satisfied with the quality of the LED element. But the laptop itself is quite suitable for its performance.

To complete the installation of the diode element, you first need to choose the type of future lighting. For users who are not strong in electronics, it is best to make the lighting contour. This will help reduce the likely risk of damage to performance during inept installation.

The main stages of the installation of LED tape will require:

  • disconnecting the battery;
  • removal of all fasteners (some of them can be recessed into the body, and at first glance almost invisible);
  • then you need to carefully get the hard drive and remove the drive;
  • remove the keyboard panel;
  • pull out the screen cable that is connected to the motherboard;
  • disable the loop;
  • disconnect WLAN.

Directly LED strip must be inserted into the free circuit from the edge of the keyboard. And it is necessary to take into account the place of fastening of the battery or other flat power source for installation in the case. The main disadvantages of this method of illumination include a similar disassembly during the replacement of the power source.

Watch the video: How to install a backlit keyboard on Dell XPS 17 L702X laptop (March 2024).

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