Alien marker lights. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Alien marker lights. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Beginner radio amateur

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The purpose of this design becomes clear already from the title of the article - it can be placed in the model of a fantastic UFO - an unidentified flying object.

The design consists of eight light-emitting diodes of different color of a luminescence. To obtain the intended effect, LEDs with good lighting characteristics are needed, so the author used foreign LEDs from Kingbright.

The design scheme is shown in the figure.

Alien marker lights

LEDs HL1- HL4 - flashing. They are able to give flashes of light with a frequency of 1 ... 3 Hz when a supply voltage of 3 ... 12 V is applied to any of them through a current-limiting resistor of the corresponding resistance (from tens of ohms to units and even hundreds of kilo-ohms). LEDs HL5-HL8 - two-chip three-pin with a common cathode. Depending on the current flowing and on which of the crystals the voltage is applied, the LED shines in one of two or three possible colors.

If at some point in time the HL1 LED flashes, then in addition to it, the yellow crystal of the HL5 LED, green HL7 and yellow HL8 will light up. In the case of simultaneous flashing of the HL1 LED with HL2, both HL5 crystals will light up, which will give an approximately orange glow color, and the left crystals of the HL7, HL8 LEDs will also light up brighter.

Let's consider one more situation. Let's say that the LEDs HL2 and HL3 will flash, and HL1, HL4 will be extinguished. Then the LEDs HL5, HL6 will glow red, and in HL7, HL8 both crystals will glow, which will give the resulting yellow-green humanoid glow color.

Since the flashing frequencies of the blinking LEDs do not match, the overall pattern of flashing LEDs will resemble some kind of "intelligent chaos". If on a small (up to 100 mm in diameter) "flying saucer" all LEDs are located around the circumference, then their "neighborhood" can be recommended: HL1, HL5, HL2, HL7, HL3, HL6, HL4, HL8.

Resistor R5 was originally installed to protect the LEDs from unexpected short circuits, but as it turns out, with this resistor, the lights flash more dynamically.

For a large model (space orbital station, military submarine base, etc.), several similar devices can be assembled. The average current consumed by each device will be 20...30 mA.

According to the author's impression, instead of two-anode LEDs, it is better to use LEDs with naturally "visually related" colors adjacent to an imaginary spectrum ruler (red - yellow, green - yellow). This is especially true for HL5, HL6. For example, if instead of these LEDs we use instances with a red and green glow color, then the color composition created by them will be unnecessarily variegated, which will not only be tiring for the eyes, but also somewhat spoil the impression of the demonstrated toy. In general, by purchasing a large number of various LEDs, you can create something that, even with the chaos set by flashing LEDs, will give rise to a warm or other (say, ominous) harmony.

The LEDs indicated in the diagram have a diameter of about 5 mm. Here are the options for replacing them. Flashing red - L56BID, L56BSRD / B, round - 5 mm in diameter; L796BSRC/D, L796BSRD/B, L796BID - 8 mm in diameter; L816BSRC, L816BSRD/B, L816BID - 10mm diameter. Flashing green - L56BGD, L796BGD, L816BGD, housing diameters correspond to series of flashing red. Flashing yellow - L56BYD, L796BYD, L816BYD. These LEDs have a flash brightness from 20 to 800 mCd and have a different body color - from matte to completely transparent.

As for dual anode LEDs, they come in different sizes: L93 - round 3mm, L59 - round 5mm, L799 - round 8mm, L119 - rectangular 5x2mm. Red-green can be L59EGW, L59SRSGW / CC, L59SURKMGKW, L59EGC, L59SRSGC / CC, L59SURKSGC, L119EGW, L119SURKMGKWT, L93WEGS, L799EGW, yellow-green - L59GWV, L59GYC, L93WGYC, red-yellow - L59EYW, L59 EYC. It is also possible to use LEDs of other series and manufacturers with a luminous intensity of at least 8 mCd.

To obtain a "stunning space effect" in series with flashing LEDs, you can turn on ordinary round LEDs of the L934MBD, L934MBT, L934MBC types with a diameter of 3 mm or a diameter of 5 mm, but very bright for their color (400 ... 10OO mCd) L7113PBD, L7113PBT, L7113PBC. They will flash synchronously with "their" flashing LED, but the supply voltage will have to be increased to 12 ... 16 V.

The LEDs are installed in the desired order around the perimeter of the toy body. Soldering to their terminals is recommended to be done no closer than 20 mm from the LED housing, which practically eliminates its damage.

Resistor R5 and capacitor C1 can be omitted, but in this case, the penetration of impulse noise into the power circuit is not excluded.

Author: A.Butov, village of Kurba, Yaroslavl region

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If you can't seem to forget something, it's possible that your brain simply lacks the neurotransmitter gamma-aminobutyric acid (GABA).

Researchers from Cambridge, the University of Utah and the University of Granada set up the following neuropsychological experiment: young people were asked to play a simple game - watch the color of the figures appear on the screen and press the right or left button on a special remote control, depending on the color of the figure. At first, the participants in the experiment pressed and pressed the buttons until it became a completely automatic action for them.

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