DIY KEYBOARD LIGHTING

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I want to share with you my example of how I made a simple keyboard backlight for my favorite computer. This backlight does not shine in the eyes and has electronic brightness control of the glow. It can be connected both to the power supply unit of the computer itself and to the bleach power adapter.

Keyboard backlighting

The brightness adjustment circuit is simple and does not contain scarce parts.

This is a regular analogue knob.

What do we need

IRF840 transistor (you can take a bipolar).
22K resistor - 2 pcs.
240K resistor.
100K variable resistor.
1-10 microfarad capacitor at 25 V.
LED strip white light, approximately 35 cm.
A piece of thin aluminum profile.
Steel wire.
Wires.

Putting together a circuit

Everything is assembled without a board by mounting. If you want, you can do everything on the board.
Next, glue the transistor to the radiator with a special heat-conducting adhesive or fasten it classically.

Check the assembled circuit in operation. If everything is infinitely adjustable, that’s good.

We install an aluminum profile above the keyboard, on a steel wire, and glue it in any convenient place. For solidity, the steel wire is dressed in black heat shrink.
We glue the regulator with hot glue to any place you need.

Connecting the backlight to the system power supply of the computer.

The result of the backlight for the keyboard

Without backlight:

Backlit:

Now the eyes are straining less and in the dark it has become much more comfortable to work.
A detailed assembly and demonstration of the work can be seen in the video.

Thanks for your attention!!!

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