VU METER (Part-2) Using LM-3914 & LM-3915

This is the second part of the music visualization series and in the video above i have shown how you can make a simple VU meter by using the ic called LM-3914 or LM-3915.

The part 1 is basically about how you can make the simple and cool looking VU meter by using the arduino microcontroller link to that is given as

https://www.instructables.com/id/UV-METER-Music-Vi...

To make this cool looking UV meter we need these following things

1.LM-3914 IC

2.Breadboard

3.Copper dot PCB

4.18 pin IC Holder

5.Resistor(1.2k & 4k ohm)

6.Potentiometer (1K ohm) & Knob

7.Audio jack

8.Dc jack

9.LED (6-Green & 2-Blue & 2-Red)

10.some connecting wires

TOOLS REQUIRED

1.soldering iron

When looking at the LM-3914 ic datasheet these are some important features i found that i am writing here

Power Dissipation PDIP (NFK) == 1365 mW

Supply Voltage == 25V

Voltage on Output Drivers == 25V

Input Signal Overvoltage == ±35V

Divider Voltage == − 100 mV to V +

Reference Load Current == 10 mA

Storage Temperature Range == − 55 °C to +150 °C

If you want to have a look at the full datasheet of this ic you can go the following link

http://www.ti.com/lit/ds/symlink/lm3914.pdf

After lots of test on the circuit which is provided in the datasheet i have recreated the circuit which is present above

The basic pin diagram overview is given as

LM-3914 Pin

1- led 1

2-GND

3-VCC

4-GND

5-AUDIO SOURCE

6-POTENTIOMETER

7-TO RESISTOR

8-GND

9-VCC

10 TO 18 -LED's

To test the circuit above i have created the circuit on a sloderless prototype board or simply the breadboard

After testing the circuit on the breadboard we can implement it on the PCB .

you can follow the instructions provided in the video above and get the basic idea that where to place the components and how to connect those

After all these steps have been done at the last we can add the music source

And the music can be from any device like a smartphone or pc or laptop or i pod

i am using a audio jack spliter in the same way as i have used that in the part 1 or this music visualization series

the one end of that spliter will go to the headphones and the other one will go our circuit as shown in the picture above

Thanks for visiting the following instructables
If you like the project make sure you give a like you can visit to my youtube channel and get so many similar projects by clicking the youtube link below

https://www.youtube.com/channel/UCZE35bOktFxu8dIad...