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 using 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 of different colors. 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. The circuit of a simple audio frequency amplifier 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 opportunities for adjusting the sensitivity. Capacitors C1-C3 pass the useful component and cut off the direct current. For implementation, any electret microphone is suitable, for the 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 with a microphone, and the second mode is achieved by simultaneously glowing the red, green and blue LEDs at 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. This is followed by an automatic level control (AGC), which keeps the fluctuations of the sound 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 structural blocks, you can proceed to the consideration of the 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 for a specific microphone model during commissioning. 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 home-made 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 feedback circuit. 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 the stabilized audio-frequency alternating current 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. A complete list of elements is 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 entire frequency range into 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

Read also

We all crave a holiday from time to time. Sometimes you want to mourn or experience other emotions. The simplest and effective method achieve the desired result - listen to music. But music alone is often not enough - you need visualization of the sound stream, special effects. 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 is a computer (or a separate power supply), a few meters of a 12v RGB LED strip, a USB breadboard (AVR-USB-MEGA16 is probably the cheapest and easiest option), and a circuit diagram for that. 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 RGB LED strip is. And it is a simple, but at the same time very ingenious invention.

LEDs have been known for more than a decade, 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 an energy-saving lamp, in the space industry, as well as in the field of special effects. The latter includes color music. When three types of LEDs - Red (Red), Green (Green) and Blue (Blue) are combined on the same strip, then an RGB LED strip is obtained. Modern RGB diodes have a miniature controller. This allows them to emit all three colors.

A feature of this tape is that all the diodes are grouped and connected in a common chain controlled by a common controller (it may also be a computer if connected via USB, or a special power supply with a control panel for standalone modifications). All this allows you to create an almost endless tape with a minimum of wires. Its thickness can literally reach several millimeters (if you do not take into account options with rubber or silicone protection against physical damage, moisture and temperature). Prior to the invention of this type of microcontroller, the simplest model had at least three wires. And the higher the functionality of such garlands was, the more wires there were. In Western culture, the phrase "unravel the garland" has long become a household word for all long, tedious and extremely complicated cases. And now this has ceased to be a problem (also because the LED strip is prudently wound onto a special small drum).

What we need?

Do-it-yourself color music from GE60RGB2811C tape

Ideally, for organizing color music with our own hands, a ready-made LED strip powered by USB port computer. All we need is to download the necessary application for 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.

In the sale of electronic component stores there are LED strips of various lengths and power, but we only need 12v. It is the best option for connecting to a computer via USB. So, for example, you can find the GE60RGB2811C model, which is a series-connected 300 RGB LEDs. One of the advantages of any such tape is that it can be cut as it suits you - 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 settings scheme

We may also need a breadboard for USB connection. The most popular, cheap, but at the same time functional option for connection is the AVR-USB-MEGA16 model for USB 1.1. This version of USB is already considered somewhat obsolete. 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 scheme of such a connection requires from 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 symbols are indicated on the board itself, what connector and what is needed) 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. The sound with just this option 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 tape contacts to a USB cable from a smartphone

If this board could not be obtained, then in the most extreme case, the connection can be made through a 12v RGB LED strip to a USB cable from a smartphone or tablet computer(the scheme 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 knowledge in programming allows and the scheme and algorithm of all actions are clear), select the desired mode (by the number of diodes), and enjoy the work done by yourself.

Conclusion

Color music is not a necessity, but it makes our life much more interesting, and not only because we can now look at the flashing multi-colored lights that light up and go out to the beat of our favorite melody. No, we are talking about something else. By making something like this with your own hands, and not 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. And as a matter of fact - the color music is installed, blinking and pleases the eye with minimal costs and maximum pleasure - what else do you need? ..

Lighting in the kitchen of a small apartment
We select lamps for mirrors, possible options
Chandelier for a children's room in the form of an airplane

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 audio signal spectrum 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:

The frequency spectrum of the audio signal is separated using 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 hits a 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 audio 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 of red color.

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 you can generally move the diode bridge outside 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".

Beginner Radio Amateur Competition
“My amateur radio design”

Competitive design of a novice radio amateur
“Five-channel LED color music”

Hello dear friends and visitors of the site!
I present to your attention the third competitive work (of the second competition of the site) of a beginner radio amateur. Design author: Morozas Igor Anatolievich:

Five-channel LED color music

Hello radio amateurs!

Like many beginners, the main problem was where to start, what would be my first product. Started by saying that I wanted to purchase a home first. The first is color music, the second is a high-quality headphone amplifier. Started from the first. Color music on thyristors seems to be a hackneyed option, I decided to collect color music for RGB LED strips. I present to you my first job.

The scheme of color music is taken from the Internet. Color music is simple, on 5 channels (one channel is a white background). An LED strip can be connected to each channel, but a low-power signal amplifier is required for its operation at the input. The author suggests using an amplifier from computer speakers. I went from a difficult one, to assemble an amplifier circuit according to the datasheet on a TDA2005 2x10 W chip. This power seems to me enough, even with a margin. I diligently redraw all the diagrams in the sPLAN 7.0 program

Fig.1 Scheme of color music with an input signal amplifier.

In the color music circuit, all capacitors are electrolytic, with a voltage of 16-25v. Where it is necessary to observe the polarity, there is a “+” sign, in other cases, changing the polarity does not affect the blinking of the LEDs. At least I didn't notice it. Transistors KT819 can be replaced with KT815. Resistors with a power of 0.25 W.

In the amplifier circuit, the microcircuit must be placed on a radiator of at least 100 cm2. Capacitors electrolytic voltage 16-25v. Capacitors C8, C9, C12 film, voltage 63v. Resistors R6, R7 with a power of 1 W, the rest 0.25 W. Variable resistor R0 - dual, with a resistance of 10-50 kΩ.

I took the power supply unit with a factory impulse power of 100W, 2x12v, 7A

On the day off, as expected, a trip to the radio market to purchase radio components. The next task is to draw the printed circuit board. For this, I chose the Sprint-Layout 6.0 program. She is recommended by radio specialists for beginners. It is easy to learn, I was convinced of this.

Fig 2. Color music board.

Fig 3. Power amplifier board.

The boards were made using LUT technology. There is a lot of information about this technology on the Internet. I like it when it looks factory, so LUT did it from the side of the details too.

Fig 3.4 Assembly of radio components on the board

Fig 5. Checking the performance after assembly

As always, the most “difficult” thing when assembling a radio circuit is to complete everything in a case. I bought the case ready in the radio store.

I made the front panel in this way. Drawn in Photoshop appearance front panel where variable resistors, a switch and LEDs, one from each channel, should be installed. The finished drawing was printed with an inkjet printer on thin glossy photo paper.

On a fat-free prepared panel with holes, I glue photo paper with carpentry glue:

Then I put the panels under the so-called press. For a day. As a press, I have a 15 kg barbell pancake:

Final build:

Here's what happened:

Appendices to the article:

(2.9 MiB, 2,958 hits)

Dear friends and guests of the site!

Do not forget to express your opinion on the competitive works and take part in the voting for your favorite design on the site's forum. Thank you.

Some suggestions for those who will repeat the design:
1. You can connect speakers to such a powerful stereo amplifier, then you get two devices in one - color music and a high-quality low-frequency amplifier.
2. Even if the polarity of the inclusion of electrolytic capacitors in the color music circuit does not affect its operation, it is probably better to observe the polarity.
3. At the input of color music, it is probably better to put an input node for summing the signals from the left and right channels (). According to the diagram, the author has a signal from the right channel of the amplifier to the high-frequency channel of color music (blue), and a signal from the left channel of the amplifier to the remaining channels of color music, but it is probably better to send a signal to all channels from the audio signal adder.
4. Replacing the KT819 transistor with KT815 implies a reduction in the number of possible LED connections.

It is difficult to find a person who would not like to listen to music. To satisfy this desire, high-quality music centers, speakers and other devices are purchased. For even more fun, many people think about creating special color effects that can brighten up any sound and create a romantic atmosphere on a date or a fun mood in the process of organizing a holiday party. Color music, like music centers, can be purchased, or you can do it yourself. The best option is to make color music on LEDs according to one of the proposed schemes.

Advantages of LED products

The modern electronics market represents a wide variety of LED strips, which have a wide variety of color effects. With their help, you can create high-quality spot lighting, it is possible to make color music with flashing or blurry effects.

Unlike conventional light bulbs, LEDs are characterized by a large number of positive characteristics. Among the main advantages of LED strips are:

• wide and varied color range;
• transfer of saturated colors;
• different versions - rulers, modules, discrete elements, RGB tapes;
• high response speed;
• the minimum amount of energy consumed.

Ribbons can be used at home, in clubs and cafes, you can effectively highlight shop windows. This article will describe in more detail the option of LED color music for ordinary home use.

A simple scheme with one lamp

For starters, it's worth exploring a simple circuit color music. This is a device that runs on a single LED, transistor and resistor. Power for such color music can be supplied from a constant current source with a voltage of 6-12 volts. The device works on the principle of an amplifier stage with a common emitter. The impact in the form of a signal changing in frequency and amplitude enters the main base. As soon as the oscillation frequency exceeds a certain threshold value, the transistor opens and the LED immediately flashes.

This scheme has one drawback - the rate of blinking of the LED depends entirely on the level of the produced sound signal. In other words, the light effect will only be activated at a certain level of produced music center volume. With a decrease in the intensity of the sound, the glow will be constant with rare winks.

Scheme with a single-color ribbon

This color music on a transistor is assembled using an LED strip in the load. To organize such color music, you will need to increase the power supply to 12 V, find and install a transistor with a maximum collector current that exceeds the load current, and you will also need to recalculate the total resistor value. Such color music is quite simple, made on one single-color LED strip and is ideal for beginner radio amateurs. You can collect it without any problems at home.

Simple three-channel circuit

To get color music, devoid of all the above disadvantages, it is worth using a special three-channel sound converter. Such a circuit is powered by a constant voltage of 9 V and is able to efficiently illuminate one or two LEDs in each channel. Among the main structural elements that characterize such a color-musical scheme, one can note:

• three independent amplifying stages, which are assembled on transistors of the category KT315 (KT3102);
• LEDs of different colors are included in the transistor load;
• for the pre-amplification element, a small step-down network transformer can be used.

The input signal is fed to the secondary winding of the transformer, which in turn performs two main functions - it decouples two devices at the galvanic level, and also amplifies the sound from the main line output. After that, the signal goes to three parallel and included filters, assembled on the basis of RC circuits. They operate on an individual frequency band, which directly depends on the value of the capacitor and resistor.

Color music with RGB tape

This set-top box operates from 12 volts and is ideal for installation on a car. Such color music optimally combines the main functions of the previously considered schemes and is able to work both in the lamp mode and in color music. The second mode is achieved through a special non-contact control of the RGB tape through a microphone. As for the lamp mode, it is based on the simultaneous start of the glow of the green, red and blue LEDs at full power. The mode can be selected by means of a special switch, which is located on a special board.

To understand how this prefix works, it is worth studying its sequence of actions. The main signal source here is a microphone that converts the vibrations of the sound coming from the phonogram. The received signal is insignificant, therefore it requires amplification. This can be achieved by using a transistor or a special operational amplifier. After that, the automatic AGC level controller starts. It effectively keeps sound fluctuations within reasonable limits and prepares it for further processing. Built-in filters divide the signal into three parts, each of which operates in one specific frequency range. In the end, you just need to amplify the previously prepared current signal. For this purpose, special transistors are used that operate in a key mode.

Acquisition of a finished CMU

If there is no desire to make color music for use at home, you can purchase a CMU, that is, a color music installation. This is a ready-made functional solution, which includes a controller. It will process the sound, converting it into a light and music visual representation. In the process of reproducing light, its intensity and color scheme will change, thereby creating the effect of a real disco. The CMU device also includes a panel with built-in diodes.

These devices can be based on a spectral decomposition by frequency, where each of them will correspond to a certain color solution or pre-set adjustments with a variety of effects and their alternation. You can configure them using the included remote control.

Important! Modern DMUs are very easy to install and configure. This is the perfect solution for organizing a home party or disco.

Conclusion

There are a lot of schemes for independent implementation of color music settings. You can choose a fairly simple option, where the color of the RGB tape will simply change, to quite complex ones, which in the process of work will create a large number of various effects, overflows and attenuations. In direct proportion to the skills, you can choose and perform the appropriate option. It is enough to work a little and create something truly unique, it will be lighting equipment that pleases with overflows of various color shades. Also, do not forget that there is always the opportunity to buy a ready-made color music solution and fill your home with color shades and joy.