LED lamp DIYFebruary 6, 2011
LED lamp do it yourself reworked from an energy-saving light bulb is made in 30 minutes and does not require special skills. But as a result, you can get an economical and beautiful light source. LED bulbs are an alternative to traditional incandescent bulbs and can be used both outdoors and indoors. They have high reliability, high saturation and clarity of light, and also do not emit harmful ultraviolet and infrared radiation. This article describes the process of reworking an energy-saving lamp (RKK) into a LED lamp with your own hands.
How to make a LED lamp
- To begin with, an energy-saving lamp is disassembled into its component parts, many of which can be useful later, for example, IN4007 (700V 1A) diodes or MJE13003,13001 high-voltage transistors. For the LED lamp, we need a case with a base and with holes for large 10 mm LEDs. These LEDs are more expensive than the standard 5-millimeter, but they give more brightness at the same power value (20 mA).Mount the elements of the LED lamp, we will be on a circle, cut out of foil fiberglass. On one of its sides we cut out areas for soldering a chain of LEDs using a cutter.
- On the reverse side, in the same way, we cut out sections for fixing elements of a transformerless 18V 25mA power source.
- To designate the plots, it is much easier not to poison the printed circuit board, but to make tracks with a cutter made from a hacksaw blade.
- Choose a rectifier circuit to obtain the required supply voltage of the LEDs. In this version of the circuit, a 300-ohm resistor is used to protect the lamp from electric shocks and at the same time perform the function of a fuse. Its power in this example is 0.25 watts. Also, two Z814V Zener diodes are successively included in the circuit, which form one Zener diode with a voltage of 20 V. It is possible to use a finished 19-25 V zener diode by including it in the circuit. A 47 µF capacitor is used to smooth out flicker and is also used as an additional protection for LEDs from surge current when the luminaire is turned on.A 100 Ω resistor is used to set the total current through a series of LEDs.
- We fix all the elements on the board.
- From the reverse side we solder a chain of LEDs.
- With the help of hot melt glue we attach a round board, close the lid in this way. To the LEDs protruded from the cover half.
- The resulting lamp is inserted into the ceiling. In terms of brightness, such a lamp will not be able to compete with energy-saving CFL lamps, but this option is very economical. When the power consumption is 0.4 W / h per year of use (even if it is never turned off), such a lamp uses 4 kW of electricity. This lamp can be used when lighting the corridor, porch, outbuildings, etc.