![Picture](/uploads/2/1/0/6/21066552/219114223.jpg)
LED Music Box
For the final project I have decided to make the LED music box, this is basically LED’s reacting to the pitch of the song or video played and the 3.5mm jack transmit the audio to the TIP31 transistor causing the output to be the LED’s giving off a high or a low signal, the higher the pitch and bass the brighter the LED’s will glow. This is a very basic project, however modifications can be made to make this DIY project more sophisticated and complex. If more time was provided then I would have a speaker connection onto the board, and even a switch, along with a USB connection instead of it being powered by a 9V battery. The music box is a great audio visualizer that turns audio into signals either high (1’s) or low (0’s). The LED music box works by taking input from the 3.5mm jack which is connected to a computer or an external device like a phone or a portable stereo, the jack is connected to the TIP31C transistor which a NPN bipolar transistor that sends the high or low signal to the negative leg of the last LED. Pin 1 and 3 of the transistor are connected to the jack while pin 2 is the output to the LED’s. Pin 3 is also connected to the power negative end, while on the other hand the positive end of the 1st LED is connected to the positive on the power supply in this case a 9V battery. The LED’s are daisy chained meaning that the negative leg of the 1st LED is connected to the positive leg of the 2nd LED and so on until reaching the last LED. This project uses the basic principle of LED’s that each LED consumes 2V maximum so when using a 9V battery only 4 LED’s can be supported max leaving 1V excess which powers the TIP31C which is designed for medium load and in this is more than enough. The only adjustment made from the images are that a 9V battery was used and that no switches were used.
For the final project I have decided to make the LED music box, this is basically LED’s reacting to the pitch of the song or video played and the 3.5mm jack transmit the audio to the TIP31 transistor causing the output to be the LED’s giving off a high or a low signal, the higher the pitch and bass the brighter the LED’s will glow. This is a very basic project, however modifications can be made to make this DIY project more sophisticated and complex. If more time was provided then I would have a speaker connection onto the board, and even a switch, along with a USB connection instead of it being powered by a 9V battery. The music box is a great audio visualizer that turns audio into signals either high (1’s) or low (0’s). The LED music box works by taking input from the 3.5mm jack which is connected to a computer or an external device like a phone or a portable stereo, the jack is connected to the TIP31C transistor which a NPN bipolar transistor that sends the high or low signal to the negative leg of the last LED. Pin 1 and 3 of the transistor are connected to the jack while pin 2 is the output to the LED’s. Pin 3 is also connected to the power negative end, while on the other hand the positive end of the 1st LED is connected to the positive on the power supply in this case a 9V battery. The LED’s are daisy chained meaning that the negative leg of the 1st LED is connected to the positive leg of the 2nd LED and so on until reaching the last LED. This project uses the basic principle of LED’s that each LED consumes 2V maximum so when using a 9V battery only 4 LED’s can be supported max leaving 1V excess which powers the TIP31C which is designed for medium load and in this is more than enough. The only adjustment made from the images are that a 9V battery was used and that no switches were used.
Therefore there are numerous things learned from this LED music box such as the numerous applications of LED technology and how it is vastly expanding to benefit humanity environmentally and socially. Another thing learned is how this device functions by the simple use of some LED’s, 3.5mm jack, 9V battery, and a TIP31 transistor. This device might be simple to make, but the application of this type of technology is endless as it could be applied to other types of technology to improve upon it. Such as an amplifier and a speaker could be attached to this project and the output could be displayed as the actual sound that the user is desiring and can be visualized via the LED’s. There are many adaptations that can be made to this project to help improve and expand the functionality, also this device is related to my preferred career choice of going into Electrical engineering as LED’s are a basic components for most circuits. Therefore the LED music box is a great device that is used as a visualizer converting analog to digital signals.