Constructing a Vu meter volume unit meter is simple. The LM will provide the functions to building a simple VU meter at home. The working of the Vu meter is very easy to understand, this Vu meter is working based on the ic of LM Many simple circuits are available on the internet related to the audio led visualizer. Which is most important in audio systems to find out the DB of the sound. The transistor Vu meter is available but it having some complicated circuits, and also need more components to build those circuits.
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Constructing a Vu meter volume unit meter is simple. The LM will provide the functions to building a simple VU meter at home. The working of the Vu meter is very easy to understand, this Vu meter is working based on the ic of LM Many simple circuits are available on the internet related to the audio led visualizer. Which is most important in audio systems to find out the DB of the sound.
The transistor Vu meter is available but it having some complicated circuits, and also need more components to build those circuits. The circuit is working by an input audio signal has to be injected to the lm ic. The connected 10 led on the output pins of the ic will be turned on and off according to the audio input frequency. In many application such as power amplifier, DJ system, and small audio systems and audio mixer needs these kinds of the audio display to measure the level of audio signals.
And also using the audio level meter you can identify the level of volume and also the noise on the amplifier. The sound Vu meter or audio sound level meter which is available in the home cinema setup or the stage show programs to improve the stage decorations, this also gives a special look for the stage performance. The circuit will utilize one 18 pin ic and few electronic components. It displaying the sound level as 10 units 10 LEDs. The input voltage is in between v dc supply.
In this audio level indicator or sound level meter the Lm ic pi number 1, and 10 to 18 are directly connected to the Led negative terminals. Pin number 4 and pin number 5 are connected to the ground connection. Pin number 5 is the audio input pin, we can give an audio signal through this pin.
NOTE: if you are directly connecting to the output stage of the power amplifier in that time connect a 1k ohm resistor to the 5 the pin connection.
A 10 k preset pot that provided on the reference pin. Pin number 9 is the Mode selection switch pin that allows you to select the bar mode of led visualization of dot mode , I preferring the bar mode because is very beautiful to see.
Infinity Mirror Music VU Meter Electronics Project using LM3915 IC
This electronic VU meter set is a circuit that High performance and widely popular than 40 years. I made a lot of amplifiers. Because I like to listen a music. Also, I like the VU Meter circuits too. They show power level of the audio.
Simple & Easy to Make Vu Meter or Audio Meter Using LM3915
The Video Tutorial is also embedded along with this tutorial. In the video tutorial things from the making the circuit till the testing are shown. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson.
LM3915/LM3916 VU Meter
You can watch the following video or read the written tutorial below for more details. We will start with the electronics part. This project is based on the LM integrated circuit which can sense analog voltage levels and driver ten LEDs. The analog signal goes into pin number 5, the pins from 6 to 8 are used for adjusting the voltage reference or the sensing and the pin number 9 is used for selecting Bar or Dot mode. The ten output pins are active low with a current from 1mA to 30mA so the LEDs should be connected with the negative lead to the IC outputs and there is no need of resistors. Now because 10 LEDs are just too less for a project like this, I made a little modification to circuit schematics. So it that way I connected a total of 40 LEDs.
Simple vu meter – LM3915 vu meter circuit diagram