I made this simple, and most importantly, very necessary lighting with my own hands from a Chinese lamp. After all, you can’t buy eyes, and working on a computer in a dimly lit room is very harmful to the eyes.
This lamp can be bought for 100-200 rubles. It is powered by 3 AA batteries, that is, 4.5 volts.
Naturally I took it apart. The whole circle is in it LEDs was divided into four boards.
I screwed these boards with small screws to the monitor. Two on each side.
I connected both sides in parallel and powered it all from the USB port through a 10 Ohm resistor using a USB cable from an old printer. You can use a resistor to adjust the brightness by changing its resistance in the range from 100 to 1 ohm.
It turned out to be very convenient: I turn on the computer - the backlight turns on, I turn off the computer - the backlight turns off.
Even though the shooting was during the day, believe me: it’s even better at night.
