Color music 220 volt thyristor control ku202n circuit. Simple schemes of color music on LEDs and LED strips for DIY assembly. Thyristors in color music

simple scheme of color music on 220v lamps

Everyone knows and almost everyone assembles this device flickering and flashing to the music-color music. On the Internet, many are looking for color music schemes for various queries and everywhere they are different. I present to your attention the diagram below appearance which you see in the pictures. And so, scheme of working color music for 220 volts on thermistors

A simple color scheme

Details for it will need the bare minimum.

We buy colored incandescent lamps for 220V
Given that the output stage of color music is made on thyristors, it has big power. If the thyristors are placed on heat sinks, then 1000 watts can be loaded on each channel. But for the house, lamps of 60-100 watts are enough.

Drawing printed circuit board for light music

I did not use laser ironing technology for such a simple board pattern. I just printed the picture in a mirror image and put it on the foil.

So that the paper does not move, we fix it with adhesive tape or something else and fix it and mark the places of future holes

We draw the paths with nitro paint

As a transformer, any transformer from a Chinese power supply is suitable, at least from a radiotelephone, at least from something else.

And look at the fully soldered board

We attach the cartridges to the aluminum corner

In addition, the photo sent

Almost every novice radio amateur, and not only, had a desire assemble a color-music prefix or a running fire to diversify listening to music in the evening or on holidays. This article will focus on a simple color and music console assembled on LEDs, which even a novice radio amateur can assemble.

1. The principle of operation of color and music consoles.

The work of color and music consoles ( CMP, CMU or SDU) is based on the frequency division of the spectrum of the audio signal with its subsequent transmission through separate channels low, medium And high frequencies, where each channel controls its own light source, the brightness of which is determined by the fluctuations of the audio signal. The end result of the set-top box is to obtain a color scheme corresponding to the piece of music being played.

To obtain the full range of colors and the maximum number of color shades in color and music consoles, at least three colors are used:

Separation frequency spectrum the sound signal comes from LC- And RC filters, where each filter is tuned to its relatively narrow frequency band and passes through itself only vibrations of this section of the audio range:

1 . Low pass filter(LPF) transmits oscillations with a frequency of up to 300 Hz and the color of its light source is chosen red;
2 . Mid Pass Filter(PSCh) transmits 250 - 2500 Hz and the color of its light source is chosen green or yellow;
3 . High pass filter(HPF) transmits from 2500 Hz and above, and the color of its light source is chosen as blue.

There are no fundamental rules for choosing the bandwidth or the color of the glow of the lamps, so each radio amateur can apply colors based on the characteristics of his perception of color, and also change the number of channels and bandwidth at his own discretion.

2. Schematic diagram of a color-music console.

The figure below shows a diagram of a simple four-channel color and music console assembled on LEDs. The set-top box consists of an input signal amplifier, four channels and a power supply unit that provides power to the set-top box from the AC mains.

An audio frequency signal is applied to the contacts PC, OK And General connector X1, and through resistors R1 And R2 falls on variable resistor R3, which is the input signal level control. From the middle terminal of the variable resistor R3 audio signal through a capacitor C1 and resistor R4 enters the input of a pre-amplifier assembled on transistors VT1 And VT2. The use of an amplifier made it possible to use the set-top box with almost any source of sound signal.

From the output of the amplifier, the sound signal is fed to the upper terminals of the tuning resistors R7,R10, R14, R18, which are the load of the amplifier and perform the function of adjusting (tuning) the input signal separately for each channel, and also set the desired brightness of the channel LEDs. From the middle terminals of the tuning resistors, the audio signal is fed to the inputs of four channels, each of which operates in its own audio band. Schematically, all channels are made the same and differ only in RC filters.

per channel higher R7.
The bandpass filter of the channel is formed by a capacitor C2 and passes only the high-frequency spectrum of the audio signal. Low and medium frequencies do not pass through the filter, since the resistance of the capacitor for these frequencies is high.

Passing the capacitor, the high frequency signal is detected by the diode VD1 and fed to the base of the transistor VT3. A negative voltage appearing at the base of the transistor opens it, and a group of blue LEDs HL1 — HL6 included in its collector circuit are ignited. And the greater the amplitude of the input signal, the stronger the transistor opens, the brighter the LEDs burn. To limit the maximum current through the LEDs, resistors are connected in series with them. R8 And R9. In the absence of these resistors, the LEDs may fail.

per channel medium frequency signal is supplied from the middle terminal of the resistor R10.
The band-pass filter of the channel is formed by the contour С3R11С4, which has significant resistance for low and higher frequencies, therefore, to the base of the transistor VT4 only mid-frequency vibrations are received. LEDs are connected to the collector circuit of the transistor HL7 – HL12 Green colour.

per channel low frequencies, the signal is supplied from the middle terminal of the resistor R18.
The channel filter is formed by the contour С6R19С7, which attenuates the signals of medium and high frequencies and therefore to the base of the transistor VT6 only low frequency vibrations are received. Channel loads are LEDs HL19 – HL24 Red.

For a variety of colors, a channel has been added to the color and music console yellow colors. The channel filter is formed by the contour R15C5 and works in the frequency range closer to low frequencies. The input signal to the filter comes from a resistor R14.

The color and music console is powered by constant voltage 9V. The power supply of the set-top box consists of a transformer T1, diode bridge, made on diodes VD5 – VD8, IC voltage stabilizer DA1 type KREN5, resistor R22 and two oxide capacitors C8 And C9.

AC voltage rectified by a diode bridge is smoothed by an oxide capacitor C8 and enters the voltage stabilizer KREN5. From withdrawal 3 microcircuits, a stabilized voltage of 9V is supplied to the set-top box circuit.

To obtain an output voltage of 9V between the negative bus of the power supply and the output 2 IC included resistor R22. By changing the resistance value of this resistor, the desired output voltage at the output is achieved. 3 microcircuits.

3. Details.

Any fixed resistors with a power of 0.25 - 0.125 W can be used in the set-top box. The figure below shows the values \u200b\u200bof resistors, in which colored stripes are used to indicate the resistance value:

Variable resistor R3 and trimmers R7, R10, R14, R18 of any type, as long as they fit the size of the printed circuit board. In the author's version of the design, a domestic variable resistor of the SP3-4VM type was used, trimming resistors of imported production.

Permanent capacitors can be of any type, and are designed for an operating voltage of at least 16 V. If it becomes difficult to purchase a 0.3 μF capacitor C7, it can be made up of two 0.22 μF and 0.1 μF capacitors connected in parallel.

Oxide capacitors C1 and C6 must have an operating voltage of at least 10 V, capacitor C9 of at least 16 V, and capacitor C8 of at least 25 V.

Oxide capacitors C1, C6, C8 and C9 have polarity, therefore, when mounting on a breadboard or printed circuit board, this must be taken into account: for Soviet-made capacitors, a positive terminal is indicated on the case, for modern domestic and imported capacitors, a negative terminal is indicated.

Diodes VD1 - VD4 any of the D9 series. A colored strip is applied on the body of the diode from the anode side, which determines the letter of the diode.

As a rectifier, assembled on diodes VD5 - VD8, a ready-made miniature diode bridge is used, designed for a voltage of 50V and a current of at least 200 mA.

If you use rectifier diodes instead of a ready-made bridge, you will have to slightly correct the printed circuit board, or move the diode bridge out of the main board of the set-top box and assemble it on a separate small board.

For self-assembly of the bridge, diodes are taken with the same parameters as the factory bridge. Any rectifier diodes from the KD105, KD106, KD208, KD209, KD221, D229, KD204, KD205, 1N4001 - 1N4007 series are also suitable. If you use diodes from the KD209 or 1N4001 - 1N4007 series, then the bridge can be assembled directly from the printed wiring side directly on the contact pads of the board.

Light-emitting diodes usual with yellow, red, blue and green color of a luminescence. Each channel uses 6 pieces:

Transistors VT1 and VT2 from the KT361 series with any letter index.

Transistors VT3, VT4, VT5, VT6 from the KT502 series with any letter index.

Voltage stabilizer type KREN5A with any letter index (import analog 7805). If you use nine-volt KREN8A or KREN8G (import analogue 7809), then the resistor R22 is not installed. Instead of a resistor, a jumper is installed on the board, which will connect the middle output of the microcircuit to the negative bus, or this resistor is not provided at all in the manufacture of the board.

A three-pin jack connector is used to connect the set-top box to the audio signal source. The cable is taken from a computer mouse.

Power transformer - ready-made or home-made with a power of at least 5 W with a voltage on the secondary winding of 12 - 15 V at a load current of 200 mA.

In addition to the article, watch the first part of the video, which shows the initial stage of assembling a color and music console

This is where the first part ends.
If you are tempted make color music on LEDs, then select the parts and be sure to check the condition of the diodes and transistors, for example,. And in we will make the final assembly and adjustment of the color and music console.
Good luck!

Literature:
1. I. Andrianov "Prefixes for radio receivers."
2. Radio 1990 No. 8, B. Sergeev "Simple color and music consoles."
3. Operating manual for radio constructor "Start".

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 peak of fashion. Now the situation has changed and the function of the 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 and music consoles are undeniable:

wide color gamut and more saturated light;
various versions (discrete elements, modules, RGB strips, rulers);
high response speed;
low power consumption.

How to make color music with a simple electronic circuit and make the LEDs blink from an audio frequency source? What are the options for converting the audio signal? We will consider these and other questions with specific examples.

The simplest circuit with one LED

First you need to deal with a simple color music circuit assembled on a single bipolar transistor, resistor and LED. Power can be supplied from a DC source with a voltage of 6 to 12 volts. This color music works on a single transistor according to the principle of an amplifying stage with a common emitter. The disturbing action in the form of a signal with varying frequency and amplitude is fed to the base VT1. As soon as the oscillation amplitude exceeds a certain threshold value, the transistor opens and the LED flashes.

The disadvantage of this simple scheme is that the rate of blinking of the LED depends entirely on the level of the audio signal. In other words, a full-fledged color-musical effect will be observed only at one volume level. Lowering the volume will result in a rare wink, and increasing it will result in an almost constant glow.

Scheme with a single-color LED strip

The simplest transistor color music above can be assembled using an LED strip in the load. To do this, you need to increase the supply voltage to 12V, select a transistor with the highest collector current exceeding the load current and recalculate the resistor value. Such a simple color music from an LED strip is perfect for beginner radio amateurs to assemble with their own hands, even at home.

Simple three-channel circuit

A three-channel sound converter allows you to get rid of the shortcomings of the previous scheme. The simplest scheme of color music with the division of the sound range into three parts is shown in the figure.
It is powered by a constant voltage of 9V and can light one or two LEDs in each channel. The circuit consists of three independent amplifying stages assembled on transistors KT315 (KT3102), the load of which includes LEDs different color. As an element for pre-amplification, you can use a small step-down type network transformer.

The input signal is applied to the secondary winding of the transformer, which performs two functions: galvanically isolates the two devices and amplifies the sound from the line output. Further, the signal is fed to three parallel-connected filters assembled on the basis of RC circuits. Each of them operates in a certain frequency band, which depends on the values of resistors and capacitors. The low-pass filter passes sound vibrations up to 300 Hz, as evidenced by the flashing red LED. Sound in the range of 300-6000 Hz passes through the mid-pass filter, which is manifested in the flickering of the blue LED. The high-pass filter passes the signal above 6000 Hz, which corresponds to a green LED. Each filter is equipped with a tuning resistor. With their help, you can set the uniform glow of all LEDs, regardless of the musical genre. At the output of the circuit, all three filtered signals are amplified by transistors.

If the circuit is powered from a low-voltage DC source, then the transformer can be safely replaced with a single-stage transistor amplifier.
First, galvanic isolation loses its practical meaning. Secondly, the transformer loses several times to the circuit shown in the figure in terms of weight, size and cost. Scheme simple amplifier audio frequency consists of a KT3102 transistor, two capacitors that cut off the constant component, and resistors that provide the transistor with a common emitter mode. By using a trimmer, you can achieve the overall gain of a weak input signal.

In the case when it is necessary to amplify the signal from the microphone, an electret microphone is connected to the input of the previous circuit, applying a potential to it from the power source. The diagram of a two-stage preamplifier is shown in the figure.
In this case, the tuning resistor is at the output of the first amplifying stage, which gives more possibilities to adjust the sensitivity. Capacitors C1-C3 pass the useful component and cut off D.C.. Any electret microphone is suitable for implementation, for normal operation of which a bias of 1.5V is sufficient.

Color music with RGB LED strip

The following color and music box circuit operates on 12 volts and can be installed in a car. It combines the main functions of the previously considered circuit solutions and is able to work in the mode of color music and lamp.

The first mode is achieved by contactless control of the RGB tape using a microphone, and the second mode is achieved by simultaneously illuminating the red, green and blue LEDs on the full power. The mode is selected using a switch located on the board. Now let's dwell on how to make color music, which is perfect even for installation in a car, and what details will be required for this.

Structural scheme

To understand how this color-musical prefix works, we first consider its block diagram. It will help to trace the complete path of the signal.
The source of the electrical signal is a microphone that converts sound vibrations from a phonogram. Because this signal is too small and needs to be amplified with a transistor or an op-amp. Followed by automatic regulator level (AGC), which keeps sound fluctuations within reasonable limits and prepares it for further processing. Filters separate the signal into three components, each of which operates in only one frequency range. At the end, it remains only to amplify the prepared current signal, for which transistors operating in the key mode are used.

circuit diagram

Based on the building blocks, we can proceed to consider circuit diagram. Its general view is shown in the figure.
To limit the current consumption and stabilize the supply voltage, a resistor R12 and a capacitor C9 are installed. R1, R2, C1 are set to set the microphone bias voltage. Capacitor C fc is selected individually to specific model microphone in the process of adjustment. It is needed in order to slightly muffle the signal of the frequency that prevails in the operation of the microphone. Usually reduce the influence of the high-frequency component.

Unstable voltage of the car network can affect the operation of color music. Therefore, it is most correct to connect homemade electronic devices through a 12V stabilizer.

Sound vibrations in the microphone are converted into an electrical signal and through C2 are fed to the direct input of the operational amplifier DA1.1. from its output, the signal follows the input of the operational amplifier DA1.2, equipped with a circuit feedback. The resistances of the resistors R5, R6 and R10, R11 set the gain DA1.1, DA1.2 equal to 11. The OS circuit elements: VD1, VD2, C4, C5, R8, R9 and VT1, together with DA1.2, are part of the AGC. At the moment the signal of too large amplitude appears at the output DA1.2, the transistor VT1 opens and through C4 closes the input signal to a common wire. This results in an instant voltage drop at the output.

Then stabilized alternating current the audio frequency passes through the cut-off capacitor C8, after which it is divided into three RC filters: R13, C10 (LF), R14, C11, C12 (MF), R15, C13 (HF). In order for the color music on the LEDs to shine brightly enough, you need to amplify the output current to the appropriate value. For a tape with a consumption of up to 0.5A, medium-power transistors such as KT817 or imported BD139 without mounting on a radiator are suitable for each channel. If the do-it-yourself light music being assembled involves a load of about 1A, then the transistors will need forced cooling.

In the collectors of each output transistor (parallel to the output) there are diodes D6-D8, the cathodes of which are interconnected and connected to the switch SA1 (White light). The second contact of the switch is connected to ground (GND). While SA1 is open, the circuit operates in color music mode. When the switch contacts are closed, all the LEDs in the strip light up at full brightness, forming a white stream of light in total.

PCB and Assembly Parts

For the manufacture of a printed circuit board, you will need a one-sided textolite measuring 50 by 90 mm and a ready-made .lay file, which can be downloaded. For clarity, the board is shown from the side of the radio elements. Before printing, you must specify its mirror image. Layer M1 shows 3 jumpers placed on the side of the parts.
To assemble color music from an LED strip with your own hands, you will need affordable and inexpensive components. Microphone electret type, suitable in a protective case from the old audio equipment. Light music is assembled on a TL072 chip in a DIP8 package. Capacitors, regardless of type, must have a voltage margin and be rated for 16V or 25V. If necessary, the design of the board allows you to install output transistors on small heatsinks. A 6-position terminal block is soldered on the edge for power supply, connecting an RGB LED strip and a switch. Full list elements are given in the table. In conclusion, I would like to note that the number of output channels in a home-made color and music console can be increased arbitrarily. To do this, you need to break the whole frequency range for more sectors and recalculate the bandwidth of each RC filter. Connect LEDs of intermediate colors to the outputs of additional amplifiers: purple, turquoise, orange. From such an improvement, do-it-yourself color music will only become more beautiful.

The above schemes belong to the site cxem.net

The simplest (and most popular) circuit of "color music" on thyristors KU202N.

This is the simplest and perhaps the most popular thyristor-based color and music console circuit.
Thirty years ago, for the first time, I saw a full-fledged, working "light music" up close. It was assembled by my classmate, with the help of his older brother. This was exactly the scheme. Its undoubted advantage is simplicity, with a fairly clear separation of the operating modes of all three channels. The lamps do not flash at the same time, the red low-frequency channel blinks steadily in rhythm with the drums, the middle - green channel responds in the range of the human voice, the high-frequency blue reacts to everything else subtle - ringing and squeaking.

There is only one drawback - a 1-2 watt pre-amplifier is needed. My friend had to turn on his "Electronics" almost "to the full" in order to achieve a fairly stable device operation. A step-down tr-r from a radio station was used as an input transformer. Instead, you can use any small-sized step-down network trans. For example, from 220 to 12 volts. Only you need to connect it the other way around - with a low-voltage winding to the input of the amplifier. Resistors any, with a power of 0.5 watts. Capacitors are also any, instead of thyristors KU202N, you can take KU202M.

Scheme of "color music" on thyristors KU202N, with active frequency filters and a current amplifier.

The circuit is designed to work from a linear audio output (the brightness of the lamps does not depend on the volume level).
Let's take a closer look at how it works.
Sound signal is fed from the line output to the primary winding of the isolating transformer. From the secondary winding of the transformer, the signal enters the active filters, through the resistors R1, R2, R3 regulating its level.
Separate adjustment is necessary to adjust the quality of the device, by equalizing the brightness level of each of the three channels.

With the help of filters, the signals are separated by frequency - into three channels. The lowest frequency component of the signal goes through the first channel - the filter cuts off all frequencies above 800 Hz. The filter is adjusted using the tuning resistor R9. The values of capacitors C2 and C4 in the circuit are indicated - 1 microfarad, but as practice has shown, their capacitance should be increased to at least 5 microfarads.

The filter of the second channel is set to the middle frequency - from about 500 to 2000 Hz. The filter is adjusted using the trimmer resistor R15. The values of capacitors C5 and C7 in the circuit are indicated - 0.015 microfarads, but their capacitance should be increased to 0.33 - 0.47 microfarads.

Everything above 1500 (up to 5000) Hz passes through the third, high-frequency channel. The filter is adjusted using the tuning resistor R22. The values of capacitors C8 and C10 in the circuit are indicated - 1000pF, but their capacitance should be increased to 0.01 uF.

Further, the signals of each channel are separately detected (germanium transistors of the d9 series are used), amplified and fed to the final stage.
The final stage is carried out on powerful transistors, or on thyristors. In this case, these are KU202N thyristors.

Next comes the optical device, the design and external of which depends on the designer's imagination, and the filling (lamps, LEDs) depends on the operating voltage and maximum power of the output stage.
In our case, these are incandescent lamps 220v, 60w (if you install thyristors on radiators - up to 10 pcs per channel).

Schematic assembly order.

About the details of the console.
KT315 transistors can be replaced with other silicon n-p-n transistors with a static gain of at least 50. Fixed resistors - MLT-0.5, variables and trimmers - SP-1, SPO-0.5. Capacitors - any type.
Transformer T1 has a ratio of 1:1, so any with a suitable number of turns can be used. At self-manufacturing you can use the Sh10x10 magnetic circuit, and wind the windings with PEV-1 0.1-0.15 wire, 150-300 turns each.

The diode bridge for powering thyristors (220v) is selected based on the expected load power, minimum - 2A. If the number of lamps per channel is increased, the current consumption will increase accordingly.
To power transistors (12v), you can use any stabilized power supply designed for a minimum operating current of 250 mA (or better, more).

First, each color music channel is assembled separately on a breadboard.
Moreover, the assembly begins with the output stage. Having assembled the output stage, they check its performance by applying a signal of sufficient level to its input.
If this cascade works normally, an active filter is assembled. Next - check again the performance of what happened.
As a result, after the test, we have a really working channel.

Similarly, it is necessary to collect and rebuild all three channels. Such tediousness guarantees the unconditional performance of the device after the "finish" assembly on the circuit board, if the work is carried out without errors and using "tested" parts.

Possible variant of printed wiring (for textolite with one-sided foiling). If you use a larger capacitor in the lowest frequency channel, the distances between the holes and the conductors will have to be changed. The use of textolite with double-sided foiling can be a more technological option - it will help get rid of jumper wires.

The use of any materials on this page is allowed if there is a link to the site

In this article we will talk about color music. Probably, every novice radio amateur, and not only, at one time had a desire to collect color music. What it 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 the color music that emits light can be performed on powerful lamps, for example, in a concert installation, if color music is needed for home discos, it can be done on ordinary 220 volt incandescent lamps, and if color music is planned, for example, as computer modding, for everyday use, it can be done on LEDs.

Recently, with the advent of LED strips on sale, color and music consoles using such led strips are increasingly being used. In any case, for the assembly of Color Musical Installations (CMU for short) a signal source is required, it can be a microphone with several amplifier stages assembled.

Also, the signal can be taken from the line output of the device, sound card computer, from the output of an mp3 player, etc., in this case you will also need an amplifier, for example, two cascades on transistors, for this purpose I used KT3102 transistors. The preamplifier circuit is shown in the following figure:

Preamplifier - Schematic

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 blinks under the bass ( low frequencies). To match the signal level in the color music circuit, a variable resistor R6 is provided.

There are also simpler color music circuits that any beginner can assemble, on 1 transistor, and besides, they do not need a preamplifier, one of these circuits is shown in the picture below:

Color music on a transistor

The pinout diagram of the Jack 3.5 plug is shown in the following figure:

If for some reason it is not possible to assemble a pre-amplifier on transistors, you can replace it with a transformer connected as a step-up one. Such a transformer should produce voltages on the windings of 220/5 Volts. The winding of the transformer with a smaller number of turns is connected in a sound source, for example, a radio tape recorder, in parallel with the speaker, while the amplifier must produce at least 3-5 watts of power. 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 flashes when reproducing the frequencies of its range. In this case, the frequency range is set by using filters. In the following scheme, three-channel color music (which I myself recently collected) capacitors are used as filters:

If we wanted to use in the last scheme not individual LEDs, and the LED strip, then the current-limiting resistors R1, R2, R3 should be removed in the circuit. If RGB tape or LED is used, it must be made with a common anode. If you plan to connect long LED strips, then powerful transistors mounted on radiators should be used to control the strip.

Since the LED strips are designed for 12 volts, respectively, we should raise the power in the circuit to 12 volts, and the power should be stabilized.

Thyristors in color music

So far, the article has only talked about color-music devices based on LEDs. If there is a need to assemble a CMU on 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 respectively has Anode, Cathode And Control electrode.

KU202 Thyristor

The figure above shows the Soviet thyristor KU202. Thyristors, in case it is planned to be used with a powerful load, must also be mounted on a heat sink (radiator). As we can see in the figure, the thyristor has a thread with a nut and is mounted similarly to powerful diodes. Modern imports 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. In the case of selecting analogs of thyristors, one should look at the maximum allowable voltage of thyristors, in our case, for KU202N it is 400 volts.

The figure shows a similar scheme of color music given above, the main difference in the lower scheme is that there is no diode bridge. Also, color music on LEDs can be built into system unit. I assembled such a three-channel color music with a preamplifier in a case from a sidirom. In this case, the signal was taken from the computer's sound card using a signal divider, the outputs of which were connected to active acoustics and color music. Signal level adjustment is provided, both general and separately by channels. The preamplifier and color music were powered from the 12 Volt Molex connector (yellow and black wires). The schemes of the preamplifier and three-channel color music for which they were assembled are given above. There are other color music schemes on LEDs, for example this one, also three-channel:

Color music on 3 LEDs - scheme

In this circuit, unlike the one that I collected, an inductance is used in the medium frequency channel. For those who want to assemble something simpler first, I give the following scheme for 2 channels:

If you collect color music on lamps, you will have to use light filters, which, in turn, can be both home-made and purchased. The figure below shows the filters that are commercially available:

Some lovers 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, on my own behalf, I want to say that color music on lamps loses in terms of entertainment to color music on LED, since lamps are more inertial than LEDs. And for independent repetition, you can recommend this