We all want a holiday from time to time. Sometimes you want to be sad or experience other emotions. The easiest and most effective way to achieve the desired result is to listen to music. But music alone is often not enough - visualization of the sound flow and special effects are needed. In other words, we need color music (or light music as it is sometimes called). But where can you get it if such equipment in specialized stores is not cheap? Do it yourself, of course. All you need for this is a computer (or a separate power supply), several meters of LED RGB strip with a power consumption of 12V, a USB development board (AVR-USB-MEGA16 - perhaps the cheapest and simplest option), as well as a circuit diagram for , what and where to connect.
A little about the tape
Before moving on to the work itself, it is necessary to determine what exactly this 12V LED RGB strip is. And it is a simple, but at the same time very ingenious invention.
LEDs have been known for decades, but thanks to innovative developments they have become a truly universal solution for many problems in the field of electronics. They are now used everywhere - as indicators in household appliances, independently in the form of energy-saving lamps, in the space industry, and also in the field of special effects. The latter also includes color music. When three types of LEDs - red (Red), green (Green) and blue (Blue) are combined on one strip, an RGB LED strip is obtained. Modern RGB diodes have a miniature controller. This allows them to emit all three colors.
The peculiarity of this tape is that all the diodes are grouped and connected into a common chain, controlled by a common controller (it can also be a computer if connected via USB, or a special power supply with a control panel for stand-alone modifications). All this allows you to create an almost endless tape with a minimum of wires. Its thickness can reach literally several millimeters (if you do not take into account options with rubber or silicone protection from physical damage, moisture and temperature). Before the invention of this type of microcontroller, the simplest model had at least three wires. And the higher the functionality of such garlands, the more wires there were. In Western culture, the phrase “unraveling the garland” has long become a common noun for all long, tedious and extremely confusing tasks. And now this has ceased to be a problem (also because the LED strip is prudently wound onto a special small drum).
What do we need?
DIY color music from tape GE60RGB2811C
Ideally, to organize color music with your own hands, we would use a ready-made LED strip powered by a USB port on a computer. All we need is to download the necessary application on the same computer, set up file associations with the desired audio player, and enjoy the result. But this is if we are very lucky, and if we have the money to purchase all this. Otherwise, everything looks a little more complicated.
Electronic components stores sell LED strips of various lengths and power, but we only need 12V. It is the best option for connecting to a computer via USB. For example, you can find the GE60RGB2811C model, which consists of 300 RGB LEDs connected in series. One of the advantages of any such tape is that it can be cut as you wish - to any length. All that is needed after this is to connect the contacts so that the electrical circuit is not open and the circuit is complete (this must be done).
Color music setup scheme
We may also need a development board for USB connection. The most popular, cheapest, yet functional connection option is the AVR-USB-MEGA16 model for USB 1.1. This version of USB is considered somewhat outdated because transmits a signal to the LEDs at a speed of 8 milliseconds, which is too slow for modern technology, but since the human eye perceives this speed as the “blink of an eye,” it is quite suitable for us.
If we omit most of the most complex technical subtleties and nuances, then all that the connection diagram requires of us is to take a tape of the required length, release and strip the contacts on one side, connect and solder them to the output on the breadboard (the board itself shows the symbols which connector is needed and what is it for) and, in fact, that’s all. There may not be enough power for the full length of the 12V tape, so you can power them from an old computer power supply (this will require a parallel connection), or simply cut the tape. With this option, the sound will come from the computer speakers. For those who are especially experienced in electronics, we can recommend connecting a microphone amplifier and a small “tweeter” speaker directly to the AVR-USB-MEGA16.
Scheme for attaching the contacts of the tape to the USB cord from the smartphone
If you couldn’t get this board, then as a last resort, the connection can be made via a 12V LED RGB strip to a USB cable from a smartphone or tablet computer (the diagram for setting up color music with your own hands allows this). It is only important to make sure that the cord will provide the required 5 watts of power. At the end of all these manipulations, install the SLP program (or write down all the steps in a txt file, if your knowledge of programming allows and the diagram and algorithm of all actions is clear), select the desired mode (by the number of diodes), and enjoy the work done with your own hands.
Conclusion
Color music is not a necessity, but it makes our lives much more interesting, and not only because we can now look at flashing multi-colored lights that light up and go out to the beat of our favorite melody. No, we're talking about something else. Having made something like this with your own hands, rather than buying it in a store, everyone will feel a surge of strength from the satisfaction inherent in every master and creator, and the realization that he, too, is worth something. But in essence, the color music is installed, blinks and pleases the eye with minimal costs and maximum pleasure - what else is needed?..
Lighting in the kitchen of a small apartment
We select lamps for mirrors, possible options
Chandelier for a children's room in the shape of an airplane
In this article we will talk about color music. Probably every beginning radio amateur, and not only others, at one time or another had the desire to assemble color music. What this is, I think, is known to everyone - to put it simply, it is the creation of visual effects that change to the beat of the music.
That part of color music that emits light can be performed using powerful lamps, for example, in a concert setup; if color music is needed for home discos, it can be done using ordinary 220 volt incandescent lamps, and if color music is planned, for example, as computer modding, for everyday use, it can be done with LEDs.
Recently, with the advent of LED strips on sale, color and music consoles using such LED strips are increasingly used. In any case, to assemble Color Musical Installations (CMUs for short) a signal source is required, which can be a microphone with several amplifier stages assembled.
Also, the signal can be taken from the linear output of a device, a computer sound card, from the output of an mp3 player, etc., in this case an amplifier will also be required, for example, two stages on transistors; for this purpose I used KT3102 transistors. The preamplifier circuit is shown in the following figure:
Preamplifier - circuit
The following is a diagram of a single-channel color music with a filter, working in conjunction with a preamplifier (above). In this circuit, the LED flashes along with the bass (low frequencies). To match the signal level, a variable resistor R6 is provided in the color music circuit.
There are also simpler color music circuits that any beginner can assemble, using 1 transistor, and also not requiring a preamplifier; one of these circuits is shown in the picture below:
Color music on a transistor
The pinout diagram for the Jack 3.5 plug is shown in the following figure:
If for some reason it is not possible to assemble a pre-amplifier using transistors, you can replace it with a transformer turned on as a step-up. Such a transformer must produce voltage on the windings of 220/5 Volts. The transformer winding with a smaller number of turns is connected to a sound source, for example, a radio tape recorder, parallel to the speaker, and the amplifier must produce a power of at least 3-5 watts. A winding with a large number of turns is connected to the color music input.
Of course, color music is not only single-channel, it can be 3, 5 or more multi-channel, when each LED or incandescent lamp blinks while reproducing the frequencies of its range. In this case, the frequency range is set by using filters. In the following circuit, a three-channel color music system (which I recently assembled myself), there are capacitors as filters:
If we wanted to use not individual LEDs in the last circuit, but an LED strip, then the current-limiting resistors R1, R2, R3 should be removed from the circuit. If the strip or LED is used RGB, it must be made with a common anode. If you plan to connect long LED strips, then to control the strip you should use powerful transistors installed on radiators.
Since LED strips are designed for 12 Volt power supply, we should accordingly raise the power supply in the circuit to 12 Volts, and the power supply should be stabilized.
Thyristors in color music
Until now, the article has only talked about color and music devices using LEDs. If there is a need to assemble a digital control unit using incandescent lamps, then thyristors will need to be used to control the brightness of the lamps. What is a thyristor anyway? This is a three-electrode semiconductor device, which accordingly has Anode, Cathode And Control electrode.
KU202 Thyristor
The figure above shows the Soviet thyristor KU202. Thyristors, if you plan to use them with a powerful load, also need to be mounted on a heat sink (radiator). As we see in the figure, the thyristor has a thread with a nut and is attached similarly to powerful diodes. Modern imported ones are simply equipped with a flange with a hole.
One of these thyristor circuits is shown above. This is a three-channel color music circuit with a step-up transformer at the input. When selecting analogue thyristors, you should look at the maximum permissible voltage of the thyristors, in our case for the KU202N it is 400 volts.
The figure shows a similar color music circuit to the one shown above, the main difference in the lower circuit is that there is no diode bridge. Also, LED color music can be built into the system unit. I assembled such a three-channel color music with a preamplifier in a casing from a cider. In this case, the signal was taken from the computer’s sound card using a signal divider, the outputs of which connected active acoustics and color music. It is possible to adjust the signal level, both overall and separately by channel. The preamplifier and color music were powered from a 12 Volt Molex connector (yellow and black wires). The preamplifier and three-channel color music circuits for which they were assembled are shown above. There are other LED color music schemes, for example this one, also three-channel:
Color music on 3 LEDs - diagram
In this circuit, unlike the one I assembled, inductance is used in the mid-frequency channel. For those who want to first assemble something simpler, here is the following diagram for 2 channels:
If you collect color music using lamps, you will have to use light filters, which in turn can be either homemade or purchased. The figure below shows the filters that are commercially available:
Some fans of color and musical effects assemble devices based on microcontrollers. Below is a diagram of four-channel color music on the AVR tiny 15 MK:
The Tiny 15 microcontroller in this circuit can be replaced with tiny 13V, tiny 25V. And at the end of the review, I would like to say on my own that color music using lamps is inferior in terms of entertainment to color music using LEDs, since lamps are more inertial than LEDs. And for self-repetition, I can recommend this one:
To make color music using LEDs with your own hands, you need to have at least a basic understanding of electronics, know how to use a soldering iron and understand drawings correctly.
Principle of operation
This device is based on a method of privately converting sound and transmitting it to certain channels in order to control the light source. As a result, it turns out that depending on the musical parameters, the operation of the circuit will fully correspond to it. It is on these principles that the collection scheme is based.
Typically, three or more different colors are used to create color effects. Red, blue and green are most often used. By mixing in certain combinations with a clear duration, they create a real holiday.
The division of frequencies into high, medium, and low occurs due to RC and LC filters, which are mounted and configured in a system in which LEDs are used.
Filters are configured according to the following parameters:
- For low-frequency parts, up to 300 hertz is allocated, and it is often red;
- Mid – 250 – 2500Hz, green;
- Anything above the 2000 hertz mark is converted by high-frequency filters, and it is on this element that the blue tint LED will work.
In order to obtain a variety of color shades during operation, the division into frequencies should be carried out with slight overlap. In the scheme under consideration, the choice of color is not so important, because if you wish, you can use different LEDs, rearrange their location and experiment; here everything depends on the desire of the master. An unusual color program coupled with fluctuations can have a significant impact on the final result. To make adjustments, there are also indicators such as frequency or number of channels.
Based on this information, it can be understood that color music can involve a significant number of different shades, as well as direct programming of each.
What is needed to make color music
To create such an installation, you can only use fixed resistors, the power of which is 0.25-0.125. To find out the resistance value, look at the strips located on the base.
The circuit also includes R3 resistors and trimmed R. The main condition is the ability to install them on the board on which the installation is being made. If we talk about capacitors, then when working, we take products whose operating voltage is at least 16 volts (any type is suitable). If finding capacitors C7 is problematic, then parallel connection of a pair of smaller capacitances is allowed, then you will get the necessary values. The capacitors C6, as well as C1, used in the variant under study must be started at 10 volts, and the rest at 25. In the case when outdated Soviet parts need to be replaced with imported ones, it is necessary to understand that they are all designated differently. Therefore, take care in advance to determine the polarity of the elements that will be mounted. Otherwise, the circuit may fail.
Also, to create color music with your own hands, you will need a diode bridge, the operating current of which is 200 milliamps and the voltage is 50V. In a situation where installing a finished bridge is not possible, it can be created using rectifier diodes. For convenience, they can be removed from the board and mounted separately, using a smaller workspace.
To create one channel you will need 6 LEDs of all colors. If we talk about transistors, then VT2 and VT1 are quite suitable; here the index does not play a special role.
The inexhaustible potential of LEDs has once again been revealed in the design of new and modernization of existing color and music consoles. 30 years ago, color music, assembled from multi-colored 220-volt light bulbs connected to a cassette recorder, was considered the height of fashion. Now the situation has changed and the function of a tape recorder is now performed by any multimedia device, and instead of incandescent lamps, super-bright LEDs or LED strips are installed.
The advantages of LEDs over light bulbs in color music consoles are undeniable: a wide color gamut and more saturated light; various design options (discrete elements, modules, RGB strips, rulers); high response speed; low power consumption.
How to make color music using a simple electronic circuit and make LEDs blink from an audio frequency source? What options for converting an audio signal are there? Let's look at these and other questions using specific examples.
- See also how to do
Color music using KT805AM transistors (3-channel)
First we present to your attention 12V color music with KT805AM transistors.
This color music uses a minimum of parts: 6 resistances with a nominal value of 100 Ohms, capacitors of 5 nominal values, 3 KT805AM transistors.
You can also use other KT brand transistors, ours is KT829.
This color music system for the home was assembled by hanging installation, since there are few parts, but below you can download the printed circuit board of the color music system for 2 channels (stereo)
Necessary radio components for assembling color music with your own hands:
- 3 bipolar transistors (VT1–VT3) - KT805AM (KT829).
- Electrolytic capacitors - C1 100 μF, C2, C3 4.7 μF, C4 47 μF, C5 22 μF, C6 1 μF.
- 6 resistors (R1–R6) - 100 Ohm.
- LED (LED1-LED3) - 12V.
Instead of resistors R4–R6, you can use 10 kOhm variables, and instead of LEDs, you can use an LED strip.
Color music circuit for the home using transistors:
Here is a photo of the board:
To operate this color music, you will need a preamplifier; you can use the Vega10u-120s amplifier as it, connect it to the speaker outputs.
You can download the printed circuit board for color music (3 colors, 2 channels) below:
Files for download:
How this color music, assembled with your own hands, works, see below:
Do-it-yourself color music with LEDs
This light and music installation creates a visual effect on a home Christmas tree or at a disco. With the first chords of music, the LED garlands light up with multi-colored tints.
The operation of the circuit is based on the principle of frequency division of the sound signal in channels; different frequencies correspond to different colors of LED glow. To eliminate the flickering effect and reduce eye fatigue, a backlight channel has been introduced, which is turned off when the blue channel is turned on.
The device circuit consists of three light and music channels: low frequency - red, medium frequency - green and high frequency - blue. The input circuits are equipped with signal level regulators, the setting mode of which determines the brightness of the garlands.
The input signal level can vary from 0.5 to 3 volts. Additionally, for convenience, an input signal level regulator is installed.
- Step-by-step instructions for making your own
Diagram of a light and music installation using LEDs:
The key devices are thyristors. An external signal with level differentiation is fed to the upper or lower input (line or radio). The signal through the brightness control R9 and capacitor C3 is supplied to the input of the amplifier on reverse conduction transistor VT1. The amplifier provides automatic signal limitation with diode VD1. Exceeding the signal at the base of transistor VT1 leads to the opening of diode VD1 and shunting of the base-emitter junction.
The signal taken from the collector of transistor VT1 is supplied for distribution to the input channel level regulators - resistors R1. Next, the signal goes to channel filters with frequency divisions of 50–200 Hz, 250–1000 Hz, 1200–5000 Hz.
After frequency separation, the signals are fed to the input of preamplifiers using thyristors VS1. Resistors R3 allow you to adjust the sensitivity of the input thyristors due to the variation in characteristics.
The amplified signal from the load R5 of the cathode VS1 is supplied to the control electrode of the power amplifier using thyristors VS2. LED garlands HL1–HL21 are included in pairs in the anode circuit of the output thyristor, ten pieces in two parallel lines. Limiting resistors R6, R7 (R17, R18 in the backlight) are also installed in the LED lines.
The backlight channel is composed of one thyristor VS3 and is controlled from the anode of the output thyristor of the blue channel.
The power supply of the pre-amplifier and output channels is separate - the pre-amplifier is powered from a full-wave rectifier on the diode bridge VD3 and then through resistor R16 and diode VD2 in reverse connection.
Diode VD2 prevents the channel thyristors from being shunted by a constant voltage smoothed by capacitor C4. The channels of the light and music installation are powered by pulse voltage from the VD3 rectifier.
The T1 power transformer is installed with low power (no more than 20 watts) from a Chinese adapter. Of course, with the possible replacement of the LED garland with light bulbs, the power of the transformer will have to be increased five times.
Setting up this color music for the home involves selecting the initial signal levels on each channel. It is advisable to apply a signal from the generator, and then select capacitors C1, C2 to match the channel bandwidth.
- See also how to make it yourself
List of radio elements for channel 1 (red):
- 21 red LEDs (HL1–HL21).
- 2 film or ceramic capacitors - C1 0.1 µF and C2 0.05 µF.
- Resistors - R2 1 kOhm; R4 8.2 kOhm; R5 1 kOhm; R6, R7 57 Ohm.
- Thyristors and triacs (TS1, TS2) - KU102B (KU101B) and KU102G (KU101G).
- 21 green LEDs (HL1–HL21).
- Variable resistor (R1) - 10 kOhm.
- Trimmer resistor (R3) - 100 kOhm.
- Thyristors and triacs (TS1, TS2) - KU102B (KU101B) and KU102G (KU101G).
- 21 blue LEDs (HL1–HL21).
- 2 film capacitors - C1 0.1 µF and C2 0.05 µF.
- Variable resistor (R1) - 10 kOhm.
- Trimmer resistor (R3) - 100 kOhm.
- Resistors - R2 1 kOhm; R4 8.2 kOhm; R5 1 kOhm; R6, R7 56 Ohm.
- 21 orange LEDs (HL1–HL21).
- Thyristor and triac (TS3) - KU102G (KU101G).
- Bipolar transistor (VT1) - KT312B or KT315.
- 2 diodes (VD1, VD2) - KD512A (KD106, KD512B or other low-power).
- Diode bridge (VD3) - KTs407A.
- Transformer (T1) - 12V 1A (can be 2A or higher).
- Film capacitor (C3) - 1 µF.
- 2 electrolytic capacitors (C4, C5) - 10 µF x 16V.
- Variable resistor (R9) - 10 kOhm.
- Trimmer resistor (R14) - 10 kOhm.
- Resistors - R8 100 kOhm; R10 180 kOhm; R11 10 kOhm; R6, R12 1 kOhm; R13 100 Ohm; R15 1 kOhm; R16 560 Ohm; R17, R18 56 Ohm.
| Name | Type | Replacement | Note |
| Transistor VT1 | KT312B | KT315 | NPN |
| Resistors R1–R18 | MLT 0.125 | S2-29 | - |
| Thyristors VS1–VS3 | KU101B | KU101G | 1 Ampere |
| Resistor R3 | CPO | - | - |
| Diode VD1, VD2 | KD 512B | KD 106 | - |
| Transformer T1 | Chamber of Commerce and Industry | TN | 12V 1 Amp |
| Resistor R1, R9 | SPO | SP-3 | - |
It should be noted that in the circuit all three channels have the same names of parts, since they are identical, except for the input filters. The number of channels can be increased by making two boards, which makes it possible to complement the colors.
The circuit is assembled on a printed circuit board and installed with a transformer in a plastic block BP-1. The garlands are arranged at your own discretion and connected to the device circuit with a thin stranded wire insulated with a diameter of 0.24 mm.
Color music scheme for the home - small-sized color music device
The described design of the color music device is intended for use in conjunction with a portable radio receiver VEF-201 (or similar). Thanks to the location of the screen on the front wall next to the loudspeaker, the basic principle of color music is fulfilled: color is organically associated with sound and displays it. The use of a special dispersion system made it possible to place incandescent lamps almost directly in front of the screen. In addition, the emitter-screen system is a detachable design, which greatly simplified the entire installation.
The operation of this color music device is based on the division of the sound range into three frequency subranges: low, medium and high frequencies. It is also possible to split it into 4 sub-bands, but in this case the circuit and printed circuit board should be slightly changed, as well as the location of the lamps in front of the screen.
The color music device consists of 3 main blocks:
- a pre-amplifier on transistors T1 and T2, necessary to amplify the audio frequency taken from the low-frequency detector;
- three filters on the TZ transistor;
- three power amplifiers assembled using similar composite circuits (in Fig. 1 - on transistors T4 and T5).
Depending on the transmitted frequencies (selected number of channels) in the filter of each channel, the capacitances of capacitors C3–C5 have ratings that are shown in the table below:
| Color | 1- C, µF | 2 - C, µF |
| Red | 0.1 | 0.1 |
| Green | 0.03 | 0.047 |
| Blue | 0.01 | 0.01 |
| Green | - | 0.022 |
Diode D1 is necessary to highlight the negative component at the input of the power amplifier so that transistor T4 is always open. The signal is supplied to the input directly from the low-frequency detector of the receiver.
Schematic diagram of color music for DIY installation:
- To turn off the power to the device, use the key switch B1, located on top of the receiver.
- Resistors used in the design (ULM or MLT) - 0.125.
- Electrolytic capacitors - type K50-6.
- Transistors and diodes, with the exception of transistor T5, can be used at any low frequency.
- Lamps L1 - 2.5 V, 75 mA. It is possible to use microlamps with a voltage of 9 V, but in this case the power consumption will increase by 1.5 times, and the sensitivity will decrease by 1.3 times.
Required radioelements:
- 5 bipolar transistors - 1 T1 MP40 and 4 T2–T5 MP16.
- Diode (D1) - D220.
- Resistors - R1 620 kOhm, R2, R5 10 kOhm, R3 7.5 kOhm, R4 470 kOhm, R6 5.1 kOhm, R7 4.7 kOhm, R8 220 kOhm, R9 3.3 kOhm, R10 2 kOhm, R11 2.2 kOhm, R12 62 kOhm.
- 2 electrolytic capacitors (C1, C2) - 5 µF 10V and 10 µF 10V (K50-6).
- 4 capacitors C3–C5 - 0.1 µF for the red filter, 0.03 µF for the green filter, 0.01 µF for the blue filter, 0.047 µF for the yellow filter.
- Incandescent lamp (L1) - 2.5V 75mA.
Thanks to two layers of tubes with a diameter of 1–1.5 mm, located perpendicular to each other, colors are scattered over almost the entire screen area. It should also be noted that the light hits only the screen and is not visible on the scale of the radio receiver, as a result of which the design of the emitter-screen system is significantly simplified.
- You might also be interested in
- We remove the chrome strips and decorative mesh from the receiver body.
- From the left end of the bar we shorten it by 10 cm, and the mesh by 9.5 cm, after which we bend 0.5 cm of the mesh outward at a right angle (this end will form one of the edges of the screen frame).
- We select all the excess plastic on an area of 10x10 cm with a soldering iron tip, trim the edges, after which we insert the shortened mesh and strip into their original places.
- We glue a 10x10 cm plate of 3 mm thick organic glass into the resulting square.
- Next, we fill the scattering layers with glass tubes or rods with a diameter of 1–1.5 mm.
- We do not glue the first layer (vertical) to the body, but insert the tubes with noticeable force close to the organic glass plate.
- We place the second layer (horizontal) on top of the first and glue it to the body.
- We fix the lamps in the existing round holes on the back of the radio power compartment. This is reflected in Figure 3.
- First, we place thin foil under them, and after installing the lamps, we seal these holes with light filters.
- We connect the terminals of the lamps to the power amplifier board with a PEL 0.2 wire.
From a thin sheet of duralumin we cut out 2 plates measuring 5x15 mm, in which we drill two holes with a diameter of 3 mm. This is reflected in Figure 4.
After the plate we bend it at a right angle. Using these corners, we attach the printed circuit board to the two screws that secure the loudspeaker. The board will thus be located at the bottom of the radio, with the parts inside the chassis.
Power amplifiers are assembled on a separate board measuring 60x25x2 mm. This board is glued to the radio circuit board and to the chassis, as shown in Figure 5. The same figure shows the location of the printed circuit board on the radio chassis.
Appearance of the device
The push-button power switch is made from a table lamp switch. It is attached to the KPI block. Its location relative to the elements of the radio receiver is shown in Figure 6.
Setting up a color music device comes down to selecting the optimal modes of all stages and passbands of three filters.
- Using resistor R1 we set the collector current of transistor T1 to 0.3 mA.
- Using resistor R4 we select the collector current of transistor T2 equal to 0.5–0.8 mA.
- We set the filter gain to be the same for all 3 channels.
- We select the filter bandwidth using resistors R10 and R11, instead of which we install a potentiometer during setup.
- Finally, in the silent mode of the receiver, we select resistor R12 so that lamp L1 is on the threshold of lighting up.
Video about creating color music for your home with your own hands:
Almost all color music devices of sufficient power are designed for the use of conventional incandescent lamps. There are also CMU circuits on LEDs on the Internet, but they are usually for low-power LEDs. How to connect 50-100 watt LEDs to such a device? You can take as a basis one very good color music scheme (also with sound control via a microphone) and slightly modify the output part - get the desired result.
CMU circuit for high-power LEDs
Schematic diagram of the CMU for 220V 
Schematic diagram of the CMU for 12V 
The electrical power supply for the input part of the frequency processing is made on a piece of a universal board. The transformer was taken from some kind of radio. It is ideal because it is symmetrical and has 10V windings. BT151/600 thyristors were used as powerful switches, with a margin so that they would not burn out from high currents.
The circuit can be made completely isolated from the network if the executive part is used using triacs and optocouplers.
When testing, temporarily install resistors of rated resistance and power from 10 W instead of LEDs.
CMU with 12 V LED strips
If you want to use 12 V DC LED strips in the CMU, then you can power the entire circuit with the same 12 volts from a pulse network driver, and assemble the output part using high-power field-effect transistors.
A version of the diagram is shown above. Here resistor R2 sets the current limiting of the LED strip (or a powerful single LED).
By the way, when installing individual high-power LEDs, for example 100 watts (32 V at 3 A), supply the supply voltage from the driver through the LED to the drain of the field-effect transistor (after making sure from the datasheet that it can withstand such U/I parameters), and the specified Use the resistor above to set the desired current level.
The body is made of wood (easier to find the material and easier to process). The holes for the lamps are drilled with large cutters. Naturally, on the front there are all the necessary knobs for adjusting signal levels and HF-MF-LF channels and a power button.
