A simple LED lamp for the landing. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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A simple LED lamp for the landing. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Lighting

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In many cases, two LEDs are enough to illuminate a staircase or entrance. On fig. 1 shows a diagram of their connection to a 220 V network. LEDs EL1, EL2 can be of any type, including increased brightness. With the indicated resistor values, the average current through each of them is about 5 mA. It is important that the LEDs are connected in opposite polarity and each of them, working in the half-cycle of the mains voltage of "its" polarity, serves as a reverse voltage limiter for the other. If you mistakenly turn on the LEDs in the same polarity, the full reverse mains voltage will be applied to them and both of them will fail.

Simple LED Landing Light
Fig. 1

Details, with the exception of the resistor R1, are mounted on a round fiberglass board with a diameter of 28 mm. Three slots are made with a file on the periphery of the board, designed for L-shaped brackets made of tinplate, soldered to the upper edge of the E27 base from a burned-out incandescent lamp. With these brackets, the board is subsequently attached to the base.

From the hole in the central contact of the base, the remainder of the output of the burnt lamp and solder are removed. One of the terminals of the resistor R1 is passed into this hole, the other is connected to the resistor R2 on the board. After attaching the board with mounted parts to the base, the protruding terminal of the resistor R1 is cut off, and its remaining part is soldered to the central contact.

Simple LED Landing Light
Fig. 2

The finished LED lamp is shown in fig. 2. The picture also shows two long screws that help screw it into a standard electric chuck.

Author: E. Tertyshnik, Obninsk, Kaluga Region; Publication: radioradar.net

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Comments on the article:

Vladimir
electrically hazardous

Victor
With the declared current through the LEDs of 5mA, the circuit is suitable only for lighting the switch, and not for the staircase. About the design: it is easier and more aesthetic to use a cartridge with a "skirt" from a faulty energy-saving device.

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