Make your own LED Sign VU Meter
video description
I connected a pc remote app to it and was able to sing live while it's dancing with my music!
Details
I just programmed it so that the voltage that comes out of my laptop (analog signal) will be transferred into the Arduino board. Then, i chose the right voltage for the right LED section (LED line. I started playing music from my laptop. The data came out of the headphone jack (analog signal) then it started DANCING. I also connect an RGB light to the board so that it changes it's color depending if music volume is high or low. You can also replace the headphone jack with a microphone. But i like the headphone jack more.
Date: 2020-09-05
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Comments and reviews: 9
analogaudio
For people who tell people who struggle that it's not hard, consider your own experience level or mechanical aptitude first, everyone is different. If you have some ee engineering experience, it is especially easy, if you have a confidence issue and feel the need to show off, you have a superiority complex and you're acting like a gatekeeper, most average people aren't even sure about something like this, when you started out, you couldn't do this, stop being cocky and telling how it is so easy to everyone who has an opinion about it.
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For people who tell people who struggle that it's not hard, consider your own experience level or mechanical aptitude first, everyone is different. If you have some ee engineering experience, it is especially easy, if you have a confidence issue and feel the need to show off, you have a superiority complex and you're acting like a gatekeeper, most average people aren't even sure about something like this, when you started out, you couldn't do this, stop being cocky and telling how it is so easy to everyone who has an opinion about it.
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Vinja
Could I suggest an easy, but effective mod for you circuit? Instead of just amplifying the signal, use the first op-amp to make the 'op-amp rectifier circuit'. Op-amp rectifier will not distort the output signal (and therefore give an erroneus VU output if just diodes were used, especially with low input signals, and, most importantly, will not insert any distortion back into the input signal. This is very important in cases where VU meter is connected in parallel to the audio line, for example between pre-amp and the power amplifier.
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Could I suggest an easy, but effective mod for you circuit? Instead of just amplifying the signal, use the first op-amp to make the 'op-amp rectifier circuit'. Op-amp rectifier will not distort the output signal (and therefore give an erroneus VU output if just diodes were used, especially with low input signals, and, most importantly, will not insert any distortion back into the input signal. This is very important in cases where VU meter is connected in parallel to the audio line, for example between pre-amp and the power amplifier.
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Abraham
i have one question eventho u dont really answer anymore,
how do you connect multiple cathode
like with the anode(ground) you can connect them all together
but cathode i know that i need to connect a resistor to each and i was wondering how can i connect multiple cathode with the use of a single resistor?
like how the led strip works
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i have one question eventho u dont really answer anymore,
how do you connect multiple cathode
like with the anode(ground) you can connect them all together
but cathode i know that i need to connect a resistor to each and i was wondering how can i connect multiple cathode with the use of a single resistor?
like how the led strip works
reply
Naitik
I had made vu meter using transistor and IN4148 diode. Each led has saprate transistor. But it required more power as input signal. I connect it with speaker output of an amplifier and add a 10 uf capacitor in signal line. Its results was great. It gives a little delay to fall down of led light and also led lightup brightly.
reply
I had made vu meter using transistor and IN4148 diode. Each led has saprate transistor. But it required more power as input signal. I connect it with speaker output of an amplifier and add a 10 uf capacitor in signal line. Its results was great. It gives a little delay to fall down of led light and also led lightup brightly.
reply
Zenvir
This one I simple and good, but kind of expensive because you need so many ICs
I have seen circuit to make VU meter that utilise diodes in series, and then hooking each junction between diodes to base of transistors that then drive leds.
I tried it but it didn't work, does anybody else tried that circuit?
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This one I simple and good, but kind of expensive because you need so many ICs
I have seen circuit to make VU meter that utilise diodes in series, and then hooking each junction between diodes to base of transistors that then drive leds.
I tried it but it didn't work, does anybody else tried that circuit?
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Tyler
I built this circuit around 2 years ago, but upon completing the circuit all my leds are always on, whether an audio signal is connected or not. Is there an obvious mistake Ive made? Any help would be greatly appreciated.
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I built this circuit around 2 years ago, but upon completing the circuit all my leds are always on, whether an audio signal is connected or not. Is there an obvious mistake Ive made? Any help would be greatly appreciated.
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Steven
Love your videos! I would really appreciate a more in depth look at how it works however! Like how you did the math to figure out all the dffirent resistors, mosfets, etc that you would need.
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Love your videos! I would really appreciate a more in depth look at how it works however! Like how you did the math to figure out all the dffirent resistors, mosfets, etc that you would need.
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Secrus
Great Scott, how about revision of this project, this time as audio pass-through, so that we don't need to wonder how to properly connect it and still have music?
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Great Scott, how about revision of this project, this time as audio pass-through, so that we don't need to wonder how to properly connect it and still have music?
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Brandon
Great video! I was curious if you would be able to share the schematic file for this setup. I would love to try this circuit design for myself if possible
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Great video! I was curious if you would be able to share the schematic file for this setup. I would love to try this circuit design for myself if possible
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