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In connection with the big scam, to introduce thoughts into the consciousness about the need to install energy-saving lamps in your home, many people began to put them in large numbers at home. But soon you are surprised to notice that the durability of such lamps is a maximum of half a year, the brightness and temperature of the light do not stand up to criticism, and the price, even for non-branded energy-saving lamps, is 10 times higher than for ordinary incandescent lamps. Of the fluorescent lamps purchased last year, more than half have already burnt out.


Typical converter design for an energy-saving lamp.



If you also have spent lamps lying around at home, you can redo them by pulling out the internal converter board and replacing it with a voltage reduction circuit to power the LEDs. The power supply current of the LEDs is set by a resistor of 100-200 Ohms, within 20-50mA.


So, we disassemble the lamp, removing the converter board and the glass bulb (as a rule, it burns out the fastest). There remains a cartridge with a capacious base. There we will place the assembled circuit with LEDs and a reflector.




LEDs, of course, will not give the brightness that a fluorescent lamp, but if you do not buy consumer goods at $ 0.1, but branded ones, the brightness of 6 pieces will be at a fairly decent level.

These LED lamps are already being produced in industry, but their price is still higher than that of energy-saving ones.



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Comments (10)
  1. Nub
    #1 Nub Guests May 21, 2011 18:25
    2
    Respect to the author !!! Only now there is one small request - you can specify the marking and nominal values ​​for all elements, otherwise a 300k resistor or for example a 1-watt DC resistor (and 200 is what) is not entirely clear. In general, I would like more detail !!! Thank you very much in advance!!!
  2. NOTFRONT
    #2 NOTFRONT Guests May 21, 2011 19:16
    0
    Read a book like "Designation of elements on radio electronic circuits." 200 is 200 ohms.
  3. TRP
    #3 TRP Guests October 21, 2011 11:42
    4
    Hmm ... 12V on 6 LEDs, not enough? Zener diode working current 10mA. It has not burned yet ..? So turn on the zener diode ..... wink barbarian.
  4. NOTFRONT
    #4 NOTFRONT Guests October 21, 2011 13:26
    1
    Go read books. Depending on the letter index, the stabilization current can easily hold up to 1A. and stabilization voltage can be from 5.5 - 36 Volts. The circuit is working, though with low efficiency. Such a scheme has already become "classic" in the transformerless conversion of electricity!
  5. Veent
    #5 Veent Guests October 22, 2011 00:15
    4
    The article is generally mysterious.The holes of the reflector do not converge with the holes on the cover, and even such LEDs have a lens in their light and so directed how can such a room be illuminated? I saw building LED spotlights and there are flat lenses without lenses similar to smd LEDs they would be ideal and this can only be suitable for a small lamp
  6. Alexander
    #6 Alexander Guests November 23, 2014 10:51
    5
    Hello, in general, to be honest, the circuit described on D 814 is, to put it mildly, nonsense, and the lamp will ultimately have very low brightness, if I’m not mistaken this 12 V and Zener diodes are not A. The LED connection diagram is not applied, their maximum is 12 V, you can put 3 pieces in series, and so 2-3 parallel branches of 3 diodes get a maximum of 9 LEDs of 30 mA for each.
    I made it easier, the rectifier is also on 4 diodes or on the finished bridge. resistance at the 10 ohm input with a power of 0.5 W, in series a film capacitor of 1 μF 250 V. An electrolyte is placed at the output of the rectifier, depending on the LEDs connected in series, the drop at each is approximately 3 volts, therefore if you turn on 15 LEDs and put the electrolyte at 50 V 500 μV this will be quite enough and the brightness will be decent, several lines of 15 LEDs can be used, increasing the capacitance of the capacitor in front of the rectifier.
  7. Yuri
    #7 Yuri Guests December 11, 2014 19:09
    2
    I feed a 10-watt LED according to this scheme, although it’s not at 70 percent full power to illuminate the steps I use with the presence sensor it shines very brightly.
  8. Edward
    #8 Edward Guests February 12, 2015 15:35
    1
    Quote: Nub
    Respect to the author !!! Only now there is one small request - you can specify the marking and nominal values ​​for all elements, otherwise a 300k resistor or for example a 1-watt DC resistor (and 200 is what) is not entirely clear. In general, I would like more detail !!! Thank you very much in advance!!!

    So there, and everything seems to be clearly described, a 100-200 Ohm resistor can be 0.25-0.5 W, a 1 W 200 Ohm resistor at the input. A 200n capacitor is 200 nanofarads (0.2 microfarads), 1n4007 diodes are used in any energy saver, you can instead Soviet nickname KD105B, Zener diode D814B, 10μF dc output condenser preferably not lower than 25 volts
  9. Michael
    #9 Michael Guests April 14, 2015 09:15
    4
    It turns out interesting: the reactance of 200n at 50Hz is 16k, while the short-circuit current is only 14mA, how is it possible to regulate the output current of 20-50mA?
  10. Sansanych
    #10 Sansanych Guests September 27, 2017 09:38
    2
    The most reliable voltage-reduction devices are transformer. Switching the lighting network in an apartment or house to a low voltage is not a problem. Option - switching a group or one outlet to the bottom. e.g. The only inconvenience is to hide or disguise the power device. And it (with a power of 250 watts the size of a YaTP-0.25) is no more than factory power supplies. The most important thing is safe.

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