Simple color music on LEDs
Very simple three-channel RGB color music on LEDs does not contain scarce or expensive components. All elements can be found in any, even the youngest radio amateur. The principle of color music is a classic, which has become the most popular. It is based on the division of the audio range into three sections: high frequencies, mid frequencies and low frequencies. Since the color music is three-channel, each channel monitors its frequency limit and how its level reaches the threshold value - the LED lights up. As a result, when playing music, a beautiful light effect is born, when LEDs of various colors flash.Three transistors - three channels. Each transistor will play the role of a threshold comparator and how the level will exceed 0.6 Volts - the transistor opens. The load of the transistor is the LED.Each channel has its own color. Before each transistor there is an RC chain playing the role of a filter. Visually, the circuit consists of three independent parts: the upper part is the high-frequency channel. The middle part is a medium frequency channel. Well, the lowest channel in the scheme is a low-frequency channel. It is powered by 9 volts. The input is signaled from the headphones or from the speakers. If the sensitivity is not enough, then you will need to collect the amplifier stage on a single transistor. And if the sensitivity is high, then you can put a variable resistor on the input and adjust the input level with it. You can take any transistors, not necessarily KT805, then you can even put low-power type TK315, if only one LED is loaded. In general, it is better to use a composite transistor of type KT829. The LEDs are super bright, I took hereAliExpress. There you can also take all the other components of the circuit.
Simple color music circuit
Assembling color musicYou can assemble color music by mounted mounting or on a circuit board as I did. You don’t need to set up, assembled, and if all the parts are fit, everything works and flashes without problems.
Can you connect an RGB LED tape to the input?Of course you can, for this we connect the whole circuit not to 12 V, but to 12 At the same time, the quenching resistor is 150 ohm from the circuit. The common wire of the tape is connected to the plus 12 V, and the RGB channels are scattered across the transistors. And, if the length of your LED strip exceeds one meter, then you will need to install transistors on radiators so that they do not overheat from overheating.
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