Lastly, solder a screw terminal to connect the power supply to the circuit board. Solder two more of them for supply 12 to arduino. Please note that you need to solder male headers with four pins for RGB LED strip and the same for connecting it to arduino. There is one transistor for each of the three colors- Red, Green and Blue.įor soldering the circuit, refer to the schematic given above. To provide them power, the circuit consists of three power transistors that receive a low power signal from arduino and amplify that signal which is enough to power the strips. The need for such a circuit here is that since the output voltage of arduino's digital pins in just 5v while LED strips require atleast 12v to operate. Now an important step, here you have to solder a circuit that will control the RGB LED strip through the signals received by arduino. The reason for this is that the output voltage of Arduino's digital pins is 5v while LED strips require 12v to operate. It rather sends signals to an external transistor circuit which drives the strip. However, it must be noted that arduino doesn't drive the LED strip directly. On detecting such kind of a change, it changes the LED color to any random one. Now as you play a music track, whenever there is a loud beat of high amplitude, the arduino detects it as the audio signal goes higher than a set threshold. Audio signals are very weak as compared to electronic current so the audio input wire from an audio output device (such as an Mp3 player) is connected to arduino's analog input pin which can detect even very weak electrical signals. This helps you to learn some awesome stuff which lacks when you just copy everything up without knowing the actual working.Īs explained in the introduction, the LED strip connected to the project glow and changes it's color whenever arduino detects a loud beat of music. Do follow me for more cool projects!īefore starting with the project, I have added this step to give you a better understanding of the working of this project. Please vote for in the 'Make It Glow' and 'Arduino All The Things' Contests if you like the concept and presentation. You are free to ask any question related to this project in the comment section below. Here is a short video of the project in action: I assure that you will be really surprised on watching the final result of the project (it looks much better in real than in the images). ![]() The entire project can be completed within 2 hours (or 3 hours maximum) and requires just one of the basic parts that can be found easily. It has an input jack which sends the input signal to arduino and an output jack to send the same signal to your speakers or earphones. An advantage of this project is that it doesn't 'waste' any audio jacks. It uses a 12v power supply to power both the strip and arduino. ![]() The uses of this thing are endless! The only condition is that you have to have an audio output device near your lights to feed them with audio signals which can be processed and reacted upon.Īs told above, this project uses an arduino for taking the audio input, processing it and then giving an output through it's digital pins to the LED strip controller circuit which then drives the strips. The main purpose of this project was to use it in parties but you can also use it for daily purpose for making your music more interesting! Whether you mount in on your entrance door, around your sofa, your LED TV, on your computer desk or walls, that's up to you. LED strips mean that you can mount them anywhere in your home and even outdoors. These lights are nothing but simple RGB LED strips connected to arduino - the brain of this project. ![]() Light up your new year parties and impress all your friends with these amazing music reactive multicolor LED lights that response and change their colors on every loud beat.
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