LED color music

Sometimes you want to create a bright light show at home, call your friends, turn on the music and dive into the atmosphere of a disco. With music and friends, problems usually do not arise, but organizing color music can be quite problematic. Even the simplest lighting effects are worth, sometimes, decent money, moreover, not all stores sell. What if the desire to enjoy the lights flashing to the music does not fade away? There is a way out - to collect color music yourself.

Color music scheme

LED color music
The circuit is simple as felt, contains only three transistors and a handful of resistors with capacitors. It contains three filters for low, medium and high frequencies, so this color music can be called a three-channel. The red LED lights up when low frequencies dominate the sound signal, the blue LED responds to mids, and the green LED reacts to highs.Trimmer resistors R4 - R6 regulate the sensitivity of each of the channels, with their help sets the required brightness of the glow. Transistors VT1 - VT3 commute LEDs, here you can use any npn transistors of low power, for example, BC547, BC337, KT3102. Instead of separate LEDs to increase the brightness, you can use pieces of LED strip, in this case, transistors should be put more power, for example, BD139, 2N4923, KT961. At the input of the circuit, you can beep, for example, from a player, phone or computer. However, it may turn out that the level of the sound signal is not enough to open the transistors of this circuit and the LEDs will glow dimly. To avoid this, the signal must be amplified, for example, with a simple amplifier on one transistor, the circuit of which is shown below.

Amplifier circuit

LED color music
Any low-power transistor can be used, the domestic KT3102 has proven itself well in this circuit. Using the trimming resistor R1, you can adjust the level of the signal applied to the color music circuit. The amplifier is powered by the same 9 - 12 volts.Even a weak signal from the phone can be sent to its input, because it will be amplified to the desired level.
LED color music

Assembly of simple color music

After analyzing the schemes, you can proceed directly to the assembly of the structure. Both schemes can be assembled on the same board, as I did. The printed circuit board has a size of 35x55 mm and is performed by the LUT method. Several photos of the process:
LED color music
LED color music
LED color music
Download fee: After the excess copper is strained, the holes are drilled, the tracks are tinned, you can begin to solder the parts. The first soldered small parts - resistors, after them capacitors, transistors. Lastly, massive trimming resistors are installed on the board. To connect the power wires and the audio signal, you can use terminal blocks, then it will be much more convenient to connect the wires. After all parts are soldered it is necessary to clean the board from the flux,to ring adjacent tracks on closure.
LED color music
LED color music

First power up and setup

You must supply voltage to the board by plugging an ammeter into the break of one of the power wires. In the absence of a signal at the input, the circuit consumes about 1-2 mA. All trimmer resistors need to be rotated to the middle position, then an audio signal can be fed to the circuit input. To do this, you should use a splitter, which is included in the jack of your phone or player. In this case, the signal will simultaneously be sent to the speakers and to the light music board. With the help of R1 it is necessary to ensure that the brightness of the LEDs is sufficient. Then, using resistors R4 - R6, each channel is adjusted separately, so that the brightness of all the LEDs is the same. After the circuit is configured, instead of individual LEDs, you can connect bright LED stripes, turn on the louder music and enjoy the work done.
br>

Related News


Mini septic tank to give
Very tall and durable cat house
Poster by May 9 with your own hands
Soufflé from regular soap
Original T-shirt
Felt monkeys
Bimetallic radiators
Old Book Box