| quantity | Designation and marking of the part on the diagram | |
| 6 | × | 10K resistor R1, R3, R5 on both boards |
| 6 | × | 330 ohm - 3K resistor R2 (2K), R4 (1K), R6 (330) on both boards |
| 1 | × | 2K resistor R7 (on one board only) |
| 6 | × | 47uF capacitor C1, C2, C3 on both boards |
| 6 | × | 9014 transistor Q1, Q2, Q3 on both boards |
| 13 | × | Red LEDs D1-D6 on both boards and D19 (only on one board with R7) |
| 12 | × | Yellow LEDs D7-D12 (on both boards) |
| 12 | × | Green LEDs D13-D18 on both boards |
| 3 | × | Printed circuit boards |
| 4 | × | Battery container with fasteners, power socket, switch and USB power cable |
Set composition
2. Scheme of a 3D Christmas tree and the theory of its work
The numbers of resistors and their rating are indicated on the board, if the rating is not indicated, refer to the table of the set composition. The value of the installed resistor is determined using a color code or by measuring the resistance of the resistor with a device.
Sets of 3D Christmas trees are equipped with pairs of resistors R2, R4, R6 with resistance values different from 1K. In any case, the lowest resistance resistor is installed in the power supply circuit of the green LEDs D1-D6, and the resistor of the largest resistance in the red LED circuit D7-D12. Putting a low resistance resistor in the power supply circuit of the green LEDs will make them glow a little brighter. Green LEDs are usually less bright than other color LEDs.
Do-it-yourself installation of resistors in the board
Biting off conductors
4. Installing transistors
Installing transistors on the board
Soldering the transistor on the board
Install the transistor from the board marking side. The position of the case must correspond to the drawing on the board. Solder transistors quickly without overheating. Solder all six transistors. Next, solder the electrolytic capacitors.
5. Soldering capacitors
Positive electrode is longer
Negative electrode marking
Polarity marking on the board
The capacitors of the radio designer are soldered
When soldering electrolytic condensates, the polarity of the latter must be taken into account. The negative electrode is marked on the body of the capacitor, and the lead itself is somewhat shorter than the positive lead. The negative electrode on the board is indicated by a shaded stripe. If there is no picture on the board, then the soldering pad for the positive electrode of the capacitor is usually square. When installing the capacitor on the board, consider its position on the board. Look at the photo. Next, install the LEDs on the board.
6. Soldering the LEDs
Installing the LED in the board
LEDs also have polarity when connected. The long electrode of the LED is positive and the short electrode is negative. Notice again the PCB markings and the square shape of the positive solder pad. When soldering, be sure all LEDs of the same color should be grouped together with a common resistor and transistor, as shown in the diagram. If you solder LEDs of different colors, then one color of the LED will glow brighter than the other color (and the other color may not glow at all!).
Pay attention to the position of the LEDs relative to the board. Diode D19 is not installed yet. After installing the LEDs, it's time to check the correct installation.
7. Checking the operation of soldered boards
After installing all the elements on the 3D Christmas tree board (with the exception of the D19 LED at the tip), the board must be tested. For this, 5 Volt power is supplied to the sites marked "-" and "+" on the tree stump. We insert the batteries into the container and, observing the polarity, touch the conductors to the power contact pads on the board. Watch the video. If all parts are installed and soldered correctly, then all LEDs should flash beautifully. If not, CHECK THE CORRECT INSTALLATION and correct the errors. Next, install the power and switching elements on the base board.
8. Soldering the base board
Correct position of the switch on the board
Installing a 3D Christmas Tree Power Socket
Battery container on the base plate
Soldering battery wires
Soldering the 3D Christmas Tree Power Switch Button and Feed Socket external power supply. Attention! When installing the power switch, the cutout side of the button should face the closest edge of the PCB, see photo!. A piece of a cut electrode from a resistor or capacitor is fixed on the board to the power supply socket. Such a loop will firmly fix the sockets on the board. We fix the battery container with screws and nuts on the back side of the base plate. See photo. The conductors from the batteries are shortened and soldered observing the polarity to the printed circuit board. Apply power to the board and check the voltage polarity at the pins in the center of the board. Getting Started final assembly Christmas trees.
9. Final assembly
Electronic tree. Board assembly key
Connecting boards together
We collect two boards in a herringbone, the arrows on the boards should be nearby. Fix the position of the boards relative to each other by soldering one pad on the tree trunk.
Connecting three boards together
We insert the Christmas tree into the base printed circuit board, observing the polarity indications (“+” and “-”) on all three printed circuit boards. Make sure the tree is installed correctly and solder the contacts and remaining pads on the tree trunk.
The 3D LED tree can be powered by battery pack or USB power supply. When the plug USB power supply is inserted, the batteries are disabled by the internal contact of the socket, so the batteries can remain in place when powered by USB.
Be careful when supplying USB power from gadgets and laptops, not all of them will be able to power the Christmas tree. Radioconstructor a set of parts for assembling a 3D Christmas tree you can purchase at the following link http://ali.pub/2rdf6t . How the tree glows, look at the video
Successful assembly of a 3D Christmas tree with your own hands.
As an add-on, only one Christmas tree can be installed on the base board. And connect the second board to the batteries or via a USB cable, for example, to a power bank. The board can be fixed on a headdress or on outerwear. The night will look very cool. Then from the set you get two Christmas trees.
Do-it-yourself LED tree that does not require programming!
This project shows how to make Christmas decoration in the form of a Christmas tree without much effort and knowledge. The Christmas tree has a size of 120 x 80 cm and is made of ordinary LEDs, but their operation absolutely does not require a microcontroller and its programming. And that means it's for everyone.
The project does not take that long to make, even though it contains almost 1500 individual LEDs. It is assembled quite quickly and simply, but this is taking into account that you will follow the instructions below, which will give warnings against various errors. Before starting the assembly, it is recommended to watch the video presented above.
Step 1: Materials and Tools
To make this project, you really don’t need as many materials and tools as it might seem at first. This makes the project cheap and easy to manufacture. So, you will need:
Materials:
- LEDs 5 mm. Almost 1100 green, 300 yellow and 100 blue LEDs were used in this project. Moreover, the yellow and blue LEDs should be blinking.
- MDF sheet or fiberboard
- Soldering materials
- Electric wires, about 30 meters, preferably from a thin, solid copper core. In this case, a stripped telephone cable was used.
- An old laptop charger as a power source, in this case we used an 18.5 volt 4 amp power supply.
Most main secret in this project is to make the LEDs of individual colors blink. In this project, these are the yellow and blue LEDs. In design, the assumption was made that they would flash at different intervals, causing a random pattern after a while, and this theory turned out to be correct. At the moment of power-up, they start flashing at the same interval, but after 10 - 15 seconds, they start flashing randomly. If we take into account this feature of non-uniform operation, it turns out that to create a beautiful effect, no microcontroller, no programming, no resistors, no capacitors, nothing but LEDs are required!
From the tools you will also need quite a bit:
- Drill with a diameter of 1 mm and 5 mm, drill
- soldering iron
- Wooden layout - matrix
- Insulating tape
- Wire stripping tool (as it turned out the most important, because it makes the job very easy).
- Ruler, pencil and other little things.
Step 2: Preparing the Design
Preparation for work takes about half of the total time for the manufacture of this project, and believe me, it's worth it.
First, you need to draw an image on checkered paper (you can use graph paper), using only the colors of the LEDs that you can find. Be careful with the red color, because. in this case, 100 red flashing LEDs were ordered, and it turned out that when they are combined in a series, they turn off the entire series at the same time and do not light up anymore (this looks ugly and is not recommended for you). By combining red LEDs in a series of 9 pcs. they hardly caught fire. Blue and yellow LEDs are not affected by this problem, so I had to exclude red LEDs from the whole project.
In this project, the image was originally created in Photoshop, but it turned out to be quite a difficult moment. After searching for similar programs on the Internet, many software products were found that decompose images into square pixels. There are a lot of them, and which is more convenient - you choose. The essence of this step is to divide the image by colors into squares of a certain size. Then print it out on paper.
The next step is to properly orient the LEDs to reduce physical links. One could simply orient all the cathodes in one direction and the anodes in the other, thus creating a kind of square mask, connecting the power to only two poles, but in practice this turned out to be very inconvenient. Therefore, the connection scheme in this project looks like a connection of rectangular areas, since it does not require a large number additional resistors to reduce the voltage supplied to the LEDs, and at the same time reduce the current consumption.
From technical description LEDs, it has been found that each LED has a voltage drop of about 2.5 volts. In order to completely eliminate the use of resistors, it was decided to combine the LEDs into a series at the rate of 18.5 Volts / 7pcs. \u003d 2.6 Volts (Voltage drop across the LED). Thus, one series of LEDs should contain 7 LEDs and at the same time they will glow at maximum brightness.
In our case, we used a template with squares, in the center of which there was a dot certain color. Then, on paper, each color was combined into a series of seven LEDs. It was a very tedious task, but fun in its own way, almost like solving a puzzle. As it turned out in the end, a series of 7 LEDs is not enough to withstand a voltage of 18.5 volts, so in the end I had to increase the series to 9 LEDs. We strongly recommend that you find out and accurately calculate the allowable stresses per series. This will save you from reworking the entire circuit.
Step 3: Coordinate Soldering (LED Series)
In order to make life easier, a small matrix was made. Using the same dimensions as the final assembly, a small wooden board was made with a 5 mm pitch between the dots. When applying this matrix to a sheet of MDF or fiberboard, it must exactly match the holes to be drilled. After marking the holes, it is recommended to mark the row and column numbers, this will further simplify your further assembly. Also, on this matrix, in the next step, separate series of LEDs will be assembled, which will then be inserted into the main template.
Step 4: Create Custom LED Series
Now, with a handy template for composing a series of LEDs, you can proceed to the next step. You need to start from the very beginning, i.e. from the first series. Place the LEDs of the first series in the required order. Some of the legs of the LEDs need to be cut, otherwise they may cause a short circuit. Then straighten the legs of the LEDs so that you get a serial connection (ie, plus the previous one with the minus of the next, etc.). To mark the series, small pieces of adhesive tape were pasted with the series number on the anode of the last LED, and the minus was not indicated in any way. After assembling the series, it is checked for operability, if everything is fine, then you can proceed to the next series. In this project, 150 series of LEDs were obtained, the work is very tedious and requires attention. Remember to check connections after soldering.
Step 5: Preparing the Fiberboard
The size of the MDF sheet that was purchased for this project was the perfect size so there was no need to cut it. If you have such a need, then cut the sheet to the required size.
Draw a square grid all over the sheet, but first make sure it matches the grid you used to create the LED sections, i.e. matches the pre-matrix. Be careful if you break the square matrix a bit, i.e. draw lines not perpendicular, it can ruin your whole project!
Then, using the square template you drew on the paper, define the round areas where you want to drill the holes. These are not exact areas, they are only needed to understand the outline of the figure. Then apply the exact points for drilling holes.
After that, to make the holes easier to drill, drill all the holes with a 1 mm drill, and then go through all the holes with a 5 mm drill. This step is quite long, it took about 7 hours to drill 1500 holes!
Another extra hour was spent sanding the various bumps and deburring.
Step 6: Installing the LEDs in the MDF Board
This step is quite simple, but again, if you have exactly the same dimensions of the preliminary matrix and the holes drilled in the MDF sheet. If everything is correct, then simply insert the sections of LEDs from the back of the MDF sheet into the drilled holes, according to the paper map. Ideally, you won't need any fixation of the LEDs.
Be careful when inserting the LEDs into the holes, if the distance is a little off, then there is a chance of damaging the LED lens or soldering the pins. Also, do not rush to remove the tape with section numbers, it will come in handy in the future!
Step 7: Creating Positive and Negative Power Rails
To create power buses, you need to take a regular wire that is used for a voltage of 230 volts (for example, PVA wire strands), strip it of insulation, and twist it well to avoid delamination of small wires. Each side will require approximately 150 cm of wire. Then fasten each of the strands with reverse side MDF sheet, for example, with plastic staples, on both sides of the sheet vertically. At the intersection of the lines of the squares, the wire must be tinned for further soldering (in this case, about 60 points were obtained on each side).
Step 8: Connecting the LEDs
At this step, when all the LEDs are in place, clearly define where the series has a plus and a minus. The order in which the sections are connected does not matter.
Start from the bottom row. Solder each section in turn to the positive and negative power rails. In order to save time, wire and solder points, consider parallel connection sections - this will significantly save your time and effort. Remember that the wires for connecting to the power buses must be insulated, otherwise a short circuit will occur!
It is recommended to connect line by line, this will help you a lot if you make a mistake. Also, if you wish, you can add a regular power switch between the charger and the LED tree to the circuit, in our case, the project works simply by connecting the power supply to the outlet.
This is where the production of the project ends, but remember that this idea is suitable not only for the image of a Christmas tree, you can implement your own ideas that are completely different.
Somehow, before the New Year, I was left without a Christmas tree and without Christmas decorations (since it was in the middle of the ocean). And the soul demanded a holiday ... I still somehow imitated the Christmas tree, but I had to think about the toys. It was then that the remnants of multi-colored LED strips came to hand.
Next, I’ll chew it out first, and then I’ll briefly describe how to make original LED Christmas tree decorations. And at the same time we will consider connection options.
For this we take led strip different colors, not in silicone.
The first one will be round, we will chew it
| White ribbons look festive, in the sense of being painted white. | |
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Cut the tape with scissors right places into correct segments of three LEDs |
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For this decoration, we need three segments |
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Glue them together with a sticky base |
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We fasten the first two segments in the form of the letter "L". Please note that you need to observe the polarity and place the tape segments with poles to each other, i.e. so that the plus of one tape is directed to the plus of the other. |
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We glue the third across, getting something like the letter "A" |
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We tin the sites at the ends of the tapes, so that later it would be easier to solder |
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And we connect them in pairs with each other with wires, here I connected two "pluses" |
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After soldering all the wires, we get such a Christmas tree toy. Here I have short wiring without insulation - this is wrong, everything must be isolated. By the way, short ones are a plus, and long ones are a minus. |
Further, it would be correct to describe how and to what this joy is connected, but this will be later, but now I want to consider what other options there are.
Other variants with a large number of segments
Square
Further along the increasing number of segments is a square of four segments. I won’t chew it anymore, I think from the photo you can understand the principle. I just wanted to pay attention to the top two wires, they are both needed for a complete circuit. It is not visible in the photo, but I made the upper wire in the form of a loop.
Star
The star, of course, already consists of five segments. Here, the peculiarity is that there are practically no wires, and the tape segments are attached to each other by soldering two contact pads to each other (do not forget to observe the polarity!).
six pointed star
Consists of six sections. Rather, these are two intertwined triangles, and I made them from different ribbons (different colors).
Ball
I also tried to make something in volume and got such a ball. But I didn't really like it and I stopped there.
More cuts
You can go further by building up sections of tape, but, IMHO, this is already too much, then just glue on some kind of base and make applications of snowflakes.In work
This is what it looks like when lit:
Connection
Option 1: simple in 12v
The easiest way is to stupidly turn everything into 12 volts and there will be multi-colored toys shining steadily. We just solder the connector that hangs on each spool with 5 meter tapes and stick a regular 12 volt power supply there, which is sold in the same place as the tapes.
The toys are soldered one after the other. 
Option 2: RGB controller
More interesting option, is to connect to the RGB controller, which are on this moment more than affordable, with a large selection of both functions and capacities.If you connect toys of the same color in rows to the corresponding controller output (a row of red ones to the R pin, green to G, blue to B), we get a Christmas tree in the MoodLamp style - with a customizable color as desired.
Please note that on such controllers, control is carried out on the "ground" (as a rule), i.e. common to all channels is the "plus" wire.
Option 3: Microcontroller
This is the most fun option, although the most difficult and time-consuming. Those. it is optimal to take some Arduino and a shield with a TLC5940, connect LED toys to 16 channels, connect a sound sensor and get a disco tree.This is what I did last year:
Here is a small past-New Year's video report:
Threat. Who needs a sketch from this video
Thank you
I hope my little idea is useful and someone can use it to make New Year even more fun and colorful. Thanks to everyone who took the time to review my article. I look forward to your feedback and comments.The traditional large Christmas tree has been replaced by its miniature versions, made from the most different materials. The Christmas tree made of LEDs looks the most festive. There are several ways, LED Christmas tree. At the same time, Christmas trees look different from each other and original.
LED Christmas tree on the wall
The simplest and easiest way to make led christmas tree does not require much effort. To make such a Christmas tree, you will need an LED garland, pushpins and photographs, or small plastic toys. The tree will decorate the wall.
The buttons must be fixed in the area of the top of the spruce, at the ends of its paws and at their base. Mark the middle of the LED string and attach it to the top button. Then pass both ends of the garland through the buttons, depicting a Christmas tree. You can decorate such a Christmas tree with light balls, toys or photographs. Turn on the LED garland and admire the new Christmas tree.
LED tree from a bottle
An original Christmas tree with LEDs can be obtained on the basis of an empty champagne bottle. In addition to the bottle, you will need a drill, a drill, plasticine, glue, an LED garland and paper.
The bottle must be cleaned of the label and rinsed. Fix the prepared bottle on working surface using plasticine. At the bottom of the bottle, cover the drilling site with plasticine. Start drilling a hole. After a small notch is formed, drop a few drops of water into the hole. This is necessary so that the drill does not get very hot. Drill the hole all the way. Remove all plasticine, rinse the bottle and wipe it dry.
Pass the garland through drilled hole and fill the bottle with it. To make the product more like a Christmas tree, roll the white parchment paper into a cone, fix its edges with glue. Turn on the garland. With this, your Christmas tree is ready.
Floral Mesh LED Christmas Tree
This Christmas tree appearance will resemble a Christmas tree from under, but will look more aesthetically pleasing. To make a Christmas tree, you will need a floral net, thick cardboard, cling film, scissors, PVA glue, a brush, sewing needles, an LED garland and Christmas tree decorations.
From cardboard you need to twist the cone of the desired height. Cut the floral mesh into strips. In a container, dilute the PVA glue with a small amount of water. Wrap a cardboard cone with cling film, cut off the excess. Moisten the pieces of the floral mesh in the glue solution, and apply them to the cone, fastening them with sewing needles. After the first layer of the mesh dries, lay out the second in the same way. Leave the cone to dry completely.
After that, remove the mesh cone from the cardboard structure, carefully remove the film as well. Put an LED garland inside the cone and decorate the entire Christmas tree with toys.
On the eve of the New Year holidays, the soul demands that everything around be beautiful, magical and remind of the upcoming celebration. People actively decorate not only the premises, but also the street space. In this article, we'll show you how with my own hands make a bright glowing Christmas tree. It will well complement the area near the house or a small store.
You will need:
- plastic hooks;
- the LED garland itself (for a 2.5 meter Christmas tree, approximately 30-50 meters of garland is required);
- pegs;
- vertical support ( metal pipe, wooden block and so on.).
A little secret: a garland with closely spaced bulbs will help create a brighter and “fluffier” Christmas tree. It is also important that the threads are as close as possible to each other. The standard length of the garland does not exceed 10-20 meters. To lengthen it, you can choose models with a special connector at the end or fasten products with improvised means (for example, tie with threads). Once the garland is ready, start creating decorations. What need to do:
- prepare a free space on the site (for safety reasons, it is better to choose an area away from buildings and trees);
- install and securely fasten a vertical support, you can dig it into the ground;
- place pegs around the rack at the same distance;
- take a garland and arrange it in this way: starting from the first peg, raise it to the top, fix it on a plastic hook, lower it down to the second peg, wrap it around, bring it along the ground to the third, raise it again to the top, etc.
As you can see, making an LED Christmas tree is very simple. It will take a minimum of time and will not require special preparation. The above recommendations can be used to create decorations not only on the street, but also for the home. The principle is the same, you just need to adjust the height and cut out a round base with symmetrically located attachment points. Don't forget to disguise vertical stand and bottom: you can close them with green wrapping paper or wrap them with threads, ribbons, tinsel.
Borisova Tatiana
I am an ardent fan of everything natural and environmentally friendly, so the question of which tree to buy for the New Year holidays - live or artificial - is not even worth it. I bought Danish spruce 200/225 cm. The smell in the house is simply divine - fresh coniferous, and the atmosphere of the holiday and the corresponding mood appeared on their own. I am very satisfied with the purchase.
Krasko Svetlana
I work as a secretary of a private children's development center. Acquired live spruce 300/350 for installation in the lobby. The Christmas tree is simply gorgeous - fluffy and thick, besides, it has a very beautiful and rich emerald hue. And after decorating with toys and garlands, it looks like in the best traditions of American cinema. Both children and parents are delighted.
Zhukova Larisa
Every year I promise that this year we will not put up a Christmas tree and will limit ourselves to a small artificial one, but I understand from the eyes of my husband and children that I will not go anywhere. I have been ordering green beauties from Denmark for several years in this store. Although their price is slightly higher than domestic ones, they also look more presentable and last much longer. Last year, our Christmas tree stood before Epiphany and looked the same as on the day of purchase.
