» Video »Making a multivibrator nightlight

Making a multivibrator nightlight


A beautiful night lamp can become not only a source of artificial lighting in the dark, but also an original decorative element. The market offers a huge number of different nightlights that have a variety of shapes, lighting solutions and more. However, a truly exclusive thing can be created exclusively with your own hands, which we will do right now.


How you can make a nightlight based on a multivibrator, you can also find out by watching the video, after which we will do a text review



What do we need:
- 4 LEDs (author uses two green and two blue)
- 2 capacitors with a capacity of 2200 mF at 25 V;
- connector for power supply;
- 2 transistors KT-972A;
- 2 resistors per 10 ohms with a power of 1 watt;
- 2 resistors at 200 ohms with a power of 1 watt;
- 4 radio tubes;
- soldering iron;
- power supply unit from 6 to 12 V;
- printed circuit board.



The first step is to make a printed circuit board, the circuit of which the author homemade gives in the description of the video. You can learn how to make a printed circuit board yourself from previous materials.




Now you can start assembling. There will be no problems with this, since the author tried to create an extremely simple circuit board. What exactly you should get, you can see in the image below.


When choosing radio tubes, one should not particularly bother, because they will play a decorative role, creating an imitation of vintage. When all the components are connected to the board, you can proceed to install the radio tubes.

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1 a comment
The use of radio tubes as diffusers is interesting. :about)
But according to the scheme and design ....
Absolutely excessive power of resistors of 1 watt, as well as transistors KT972! Enough "kids" KT315 and resistors 0.125 watts.
By the way, the values ​​of electrolytes in the diagram and in the description do not match. Blooper is not fatal, but blooper.
As for the capacitance and basic resistors, an effect very useful for a night light will be observed - incomplete and leisurely extinction-ignition of LEDs.
But the ratings of the limiting resistors in the collector circuits depend on the supply voltage.Around we remember this: 5 V => 300..470 Ohm, 9 V => 820..1000 Ohm, 12 V => 1.2..1.5 kOhm (for modern, bright enough).

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