This multimeter model is one of the most common. For home use of such measuring equipment with head, there is such a tester quite inexpensive -
And even break it or lose for such a price is not sorry. The multimeter has all the necessary functionality, with the exception of the backlight, which is sometimes so necessary. The display of the display testers are at least 3-4 times more expensive. Well, now you will see how to get the cheap Chinese multimeter with high an hour.
Need
- Two LEDs.
- 100 ohm resistor - 1 com.
- The rod for the adhesive pistol.
Add to the chinese multimeter screen backlight with your own hands
Open the body of the device, unscrewing two self-pressing rear.
We take out the battery and unscrew the twisters fastening fees.
Care carefully remove. Caution, do not lose the inside: there may be metal beads of the position clamps, the springs, the display loop.
Since the multimeter turns off when the mode switch is in the central position, it means on the board there must be tracks that will be closed by runners in any position except the central one. It will be the power supply from the battery on the scheme. In this example, these are the first two rings. They closes during work.
Follow the pathways of the board where the exit to food. And visually replace it, to him, in the future, we will fade contact from the backlight to automatically turn it on.
We set the board back as it was and fixing the screws. The rod of the thermoclaus is a stationery knife with a slice along the length of the LCD display.
We will be drilled or soldering out the holes on the sides in this rod and set the LEDs.
Connect them parallelly to each other. Let's give meals and check the work.
We will apply behind the display and look at the backlight.
It turned out excellent, smooth and beautiful illumination. Minus from the LEDs we solder to the battery through the resistor. Its nominal is selected on the brightness of the glow. If you need a brighter - take resistance down.
Insulating heat shrink.
The positive wire is soldered to the contact on the board noticed earlier.
Now, when you turn on the multimeter, the backlight lights up itself.
Fix the rod with hot glue backlight. We close the multimeter housing, fix the self-drawing. Now it began to work much more convenient. To save the battery, it is desirable to connect LEDs sequentially and select a resistor with a higher resistance of 1 com.
Watch the video
Also read how from a multimeter you can quickly make a metal detector -