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Romantic LED lighting Ideas for Valentine's Day

Updated on January 29, 2013

Valentine is just around the corner and soon you will have to tell your loved one that you love her. There are many ways to demonstrate your love. You may give out presents, such as chocoalates, dinner at a restaurant, a Valentine's day card,etc.

why not try something out of the ordinary, such as an aerostatic air balloon, displaying the words, "I love you," in the air, or a fireworks display with her name on a background poster. There are an infinite number of ideas that you can try. I found some that, even though are not as extravagant, I'm sure will appeal to you. Why not tell her that you love her with LEDs. Throughout this hub, I'm going to show you how to make some great project ideas for St. Valentine's day with flashing LEDs.

Things You'll Need to Make These Projects with LEDs

  • One straw 16" long by 1/4" in diameter
  • 40” (1 m) of 3/8” (1 cm) wide green ribbon
  • One 9 by 12" red foam sheet
  • One 9 by 12" pink foam sheet
  • One square feet of a piece of fiberglass sheet 1.5 thick
  • Three feet of 1 1/2" red organza ribbon
  • 6 feet of 22 gauge red and black wire
  • Two NPN BC557 and BC558 transistors
  • Two 100 uF electrolytic capacitors
  • Two 100 K ohms resistors
  • Two 470 K ohms resistors
  • 9 V battery
  • LEDs
  • Wire cutters
  • Wire strippers
  • Breadboard

The Circuit for This Project

The circuit is a multiple LED flasher circuit that uses anywhere from two to ten LEDs. The circuit is a multivibrator circuit which oscillates between two states, an on and an off state. While one of the transistors is conducting, the other is off. The circuit includes two amplifying devices (transistors) cross-coupled with two capacitors and four resistors.

The alternating change in states determines the current and voltage through the circuit. The current and voltage change cause the LEDs to flash alternatively.

The circuit is wired on a breadboard, an electronics device in which you can insert electronics components and wires.

Circuit | Source

How to Make a Flashing LED Flower?

To make this project, you start by wrapping the 3/8” (1 cm) wide green ribbon around the long white straw, so that when you finish wrapping it, it will appear as the stem of a flower. Next, cut out two pieces of crepe paper to make two leaves, which you will glue to the stem of the flower.

Now, make the flower by folding the red organza ribbon, making pleats while holding the pleats with your fingers. In this site, you can see the instructions on how to make this flower. The flower I made is a little different, but the technique is the same.

Get the red and black 22 gauge wires and insert them into one end of the straw. hook the long pin of the red LED (the anode) to the red wire and the shorter pin of the led (the cathode) to the black wire. Connect the red (positive) and black (negative) wires to the 9 volt battery.

To avoid burning the LED, you should limit the current through it. Here is the formula to calculate the resistor to limit the current through the LED.

Flower | Source

How to Make a Valentine LED Heart?

To make this heart, I cut out an 8 inch circle around a sheet of fiberglass 1.5 mm thick. The letters for the word, "I love you," were cut from a 2 mm thick red foam sheet that I bought at a fabric store, then, I drew a heart, leaving the words, I love you," in the center. Around the outline of the heart, I placed the LEDs at about 1 inch of space from one LED to the other.

All the wiring, which was hooked up from behind, was plugged into the slots of the breadboard by using a multiple pin connector, which I got from an unused radio.

LED heart
LED heart | Source

How to Make a Valentine's Day Cupid with Flashing LEDs?

To make this cupid, I drew it first on a pink sheet of foam. To draw the cupid, I used a pencil and then I cut out the outlines with a pair of scissors. The circuitry for this project is very simple. I used nine LEDs, which I hooked to the slots in the breadboard, using the same multiple pin connector I used for the other projects.

he hearts were drawn on a red sheet of foam, then I cut them out and glued them over a white sheet of foam, along with the cupid.

LED Colors and Semiconductor Materials

Semiconductor Material
LED Color
Voltage Threshold
Gallium arsenide
850-940 nm
1.2 V
Gallium arsenide phosphide
610-760 nm
1.8 V
Aluminium gallium indium phosphide
570-590 nm
2.0 V
Gallium (III) phosphide
585-595 nm
2.2 V
Aluminium gallium phosphide
550-570 nm
3.5 V
Silicon carbide
430-505 nm
3.6 V
Indium gallium nitride
450 nm
3.7 V
Blue/UV diode with yellow phosphor
visible spectrum
3.5 V


Submit a Comment

  • unvrso profile image

    Jose Juan Gutierrez 4 years ago from Mexico City

    Thanks taking the time to read and leaving a comment on this hub.

  • MsDora profile image

    Dora Weithers 4 years ago from The Caribbean

    Thanks for sharing this information and instruction to help make an unusual Valentine celebration. I'm not going to try it (to begin with, I don't have a Valentine) but it's so thoughtful of you to share this creative idea.