LM3914 Based LED VU METER by Victor Das

By in CircuitsLEDs

13,817

20

8

Introduction: LM3914 Based LED VU METER by Victor Das

By
About: m mad about electronics, technology........who m i ??? son just don ask that .......

LM3914 based LED VU Meter its very simple and effective. Looks great when in action. It runs from 9v to 12v power supply. As like my all other projects its not just a idea or diagram its tested in all ways works just fine. Use 5mm Led looks great you can also use 3mm but the bigger the better. its a mono vu meter if you want stereo than just put  two circuits side by side. So build the circuit in good quality PCB and if you face any problem than just gave me a call i am always here to help. Happy building  

1 Person Made This Project!

Recommendations

Rubik's Cube Solver
Rubik's Cube Solver by aaedmusa in Gadgets
151 23K
Laser-Cut Infinity Dodecahedron (Fusion 360)
Laser-Cut Infinity Dodecahedron (Fusion 360) by thomasj152 in LEDs
190 16K
Bending Time: a Guide to Building a 3D Printed Curved LED Clock With WS2812 LEDs and ESP8266
Bending Time: a Guide to Building a 3D Printed Curved LED Clock With WS2812 LEDs and ESP8266 by andrei.erdei in LEDs
19 3.4K
Pingo, the Secret Color Clock by Illusionmanager
Pingo, the Secret Color Clock by Illusionmanager by illusionmanager in Clocks
1 41 4.0K

  • Make It Bridge

    Make It Bridge

  • Big and Small Contest

    Big and Small Contest

  • For the Home Contest

    For the Home Contest

8 Comments

0
deathofme
deathofme

5 years ago

I tried your circuit and keep burning up the lm3914 at 12v......but at 5v it works no problem can you explain why??? would really like the help..

0
IanA3
IanA3

8 years ago on Introduction

Hiya - You don't need the LED current limiting resistors - the LM3914 has LED current control which is set through a single resistor. Also VU meter would be better with LM3916 as it is logarithmic.

0
Varaz
Varaz

9 years ago on Introduction

Hi, it looks realy interesting i want to make it, but can you please explaine to me what is mean wire going from middle of the 5k resistor to RHI? And Am I understand this resistor is not conected directly from minus to plus? I do not realy get what is resistor mean :).

And I hope i can use 12v power source with LEDs:
Forward voltage(V): 2.0-2.2
Current(mA): 20
Am I right?
And last question will be resisotrs still 1K befor each LED?

I am new with making some electronic devices. I just made something with TIP31 But this looks better.

0
victordas
victordas

Reply 9 years ago on Introduction

Varaz plz say it again clearly, actually i don get you ,what you are trying to ask ?

0
kyrisroy
kyrisroy

8 years ago on Introduction

I am trying to build a large VU meter. I would like to run about 100 LEDs per level of sound. So with them all on there would be 1000 LEDs lit up.

Can you help me with how I would modify this circuit to be able to handle the power input I need to have to run those. The LEDs I want to use run on 12v.