Audio Amplifier VU.Meter Diagram //How to Make VU Meter
In this project, i will show you how to make a simple & easy Vu Meter or Audio Meter using LM3915.
What is a VU meter circuit?
A VU meter is also an audio visualizer that has a group of LEDs as dot or bar display. VU meters are basically used with the amplifiers and audio systems to analyze and display the audio spectrum. The LED dot or bar display lights up LEDs-high to low showing the level of the pitch with matching the pattern of bass going high or low. Here in this article, I am going to discuss a VU meter Circuit using the LM3915 IC.
PCB
LM3915 IC - 2 Nos
LED-Green - 10 Nos
LED-Yellow - 6Nos
LED-Red - 4Nos
47uF Capacitor - 2Nos
2.2k Resistor - 4Nos
100k Resistor - 2Nos
IN4007 Diode - 4 Nos
5Pin Connector
Jumper 2 Pin - 2Nos
Therefore, if you want your own PCB, you can obtain through this link on PCBWay.com. You can also order good quality PCBS from PCBWay.com at low cost. In addition to the standard pcbs, we could also support advanced Pcbs, FPC/rigid-flex Pcbs, rapid-rpototyping and other related services that could meet your needs to the most extent.
PCB order steps on PCBWay:
Visit the website: www.pcbway.com
Click PCB Instant QuoteClick
quick-order PCB Upload the gerber file by clicking "+Add Gerber File" and wait until the gerber file is finished
Uploading Set the PCB specifications as you wish, starting from the number of PCBs, the number of layers, thickness, color and others.
After that, look at the left, it will display the estimated cost
Processing time and delivery service selected
Click Save to cart
Connect the components to the PCB
We are building a stereo VU meter here. So I am using 10 green led, 6 yellow led and 4 red led here. You can use any color led you like...
IC LM3915 is an 18pin monolithic Integrated Circuit that senses the analog signal voltage levels and drives accordingly 10 LEDs Bar or dot Matrix display. Being stereo we are using 2 IC here
The capacitor is used to get a good output
With this, our PCB work is completed...
It has 2 modes
Bar Mode: To select the Bar mode you have to connect a jumper pin on PCB (connect the Pin 9 of LM3915 to the Vin)
Dot Mode: To select the Dot mode leave the jumper pin on PCB (leave the Pin 9 of LM3915 open)
I am using 12v supply here.
Instead of lm3915 you can use 3514 and 3516
Difference of LM3914 & LM3915 & LM3916
LM3914N will display an amplitude of a signal in Linear form.
LM3915N will display the signal in Logarithm form.
LM3916N: Update the outputs can drive, LCDs, vacuum fluorescents, and incandescent bulbs, as well as LEDs of any color
Normally if using the amplitude of the sound signal. We should use the LM3915N.
Audio Amplifier VU.Meter Diagram //How to Make VU Meter
In this project, i will show you how to make a simple & easy Vu Meter or Audio Meter using LM3915.
What is a VU meter circuit?
A VU meter is also an audio visualizer that has a group of LEDs as dot or bar display. VU meters are basically used with the amplifiers and audio systems to analyze and display the audio spectrum. The LED dot or bar display lights up LEDs-high to low showing the level of the pitch with matching the pattern of bass going high or low. Here in this article, I am going to discuss a VU meter Circuit using the LM3915 IC.
PCB
LM3915 IC - 2 Nos
LED-Green - 10 Nos
LED-Yellow - 6Nos
LED-Red - 4Nos
47uF Capacitor - 2Nos
2.2k Resistor - 4Nos
100k Resistor - 2Nos
IN4007 Diode - 4 Nos
5Pin Connector
Jumper 2 Pin - 2Nos
Therefore, if you want your own PCB, you can obtain through this link on PCBWay.com. You can also order good quality PCBS from PCBWay.com at low cost. In addition to the standard pcbs, we could also support advanced Pcbs, FPC/rigid-flex Pcbs, rapid-rpototyping and other related services that could meet your needs to the most extent.
PCB order steps on PCBWay:
Visit the website: www.pcbway.com
Click PCB Instant QuoteClick
quick-order PCB Upload the gerber file by clicking "+Add Gerber File" and wait until the gerber file is finished
Uploading Set the PCB specifications as you wish, starting from the number of PCBs, the number of layers, thickness, color and others.
After that, look at the left, it will display the estimated cost
Processing time and delivery service selected
Click Save to cart
Connect the components to the PCB
We are building a stereo VU meter here. So I am using 10 green led, 6 yellow led and 4 red led here. You can use any color led you like...
IC LM3915 is an 18pin monolithic Integrated Circuit that senses the analog signal voltage levels and drives accordingly 10 LEDs Bar or dot Matrix display. Being stereo we are using 2 IC here
The capacitor is used to get a good output
With this, our PCB work is completed...
It has 2 modes
Bar Mode: To select the Bar mode you have to connect a jumper pin on PCB (connect the Pin 9 of LM3915 to the Vin)
Dot Mode: To select the Dot mode leave the jumper pin on PCB (leave the Pin 9 of LM3915 open)
I am using 12v supply here.
Instead of lm3915 you can use 3514 and 3516
Difference of LM3914 & LM3915 & LM3916
LM3914N will display an amplitude of a signal in Linear form.
LM3915N will display the signal in Logarithm form.
LM3916N: Update the outputs can drive, LCDs, vacuum fluorescents, and incandescent bulbs, as well as LEDs of any color
Normally if using the amplitude of the sound signal. We should use the LM3915N.
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