Vu-Meter Stereo -20 +3dB LM3916 - PCB TUTORIAL

■ JLCPCB Prototype for $2(Any Color): jlcpcb.com
✅ Subscribe to my KZbin channel It's FREE!
- This fantastic Vu-Meter is designed to display two different signals, with a range from -20dB to +3dB. Each channel is driven by an LM3916, a great IC for Vu-Meters. I created this PCB thanks to the service offered by JLCPCB, choosing the color "Matte Black" From today on jlcpcb.com there is a big news! "10 PCBs of each color for only 2$"
- In DOT mode the LED 1 stays on at reduced brightness, as a full scale indicator.
After trying the excellent service offered by JLCPCB I recommend it, the quality of the circuits is high, customer service is always available and professional, the time of realization is short and the delivery of PCBs is by express courier.
JLCPCB is a great place to get hight quality custom circuit boards at an extremely low price, you can buy 10 PCB Boards for 2 Dollars.
JLCPCB is the largest PCB prototype enterprise and a High-Tech manufacturer specializing in quick PCB prototype and small batch PCB production. With over 12 years of experience in PCB manufacturing, has more than 400,000 customers, with over 10,000 online orders of PCB a day. Customer service is one of the best in the world, so feel free to upload your Gerber files for file review before completely submitting your order.
More About JLCPCB: support.jlcpcb...
Components:
- 2x LM3916
- 2x DIP 18 Pin (Optional)
- 21x LED 3mm (20 LED for Meters - 1 LED as PWR)
- 4x 2.7KΩ Resistors
- 2x 100KΩ Resistors
- 1x 1KΩ Resistor
- 2x 1uF @ 25V Electrolytic Capacitor
- 1x 220uF @ 25V Electrolytic Capacitor
- 2x 1N4007 Diode
- 2x Pin for DOT/BAR Mode
- PCB: (Ready for jlcpcb.com): bit.ly/2UIpkjn
*Don't use my PCB for profit or sponsored videos.
This circuit must be powered with 9V DC, below I leave the references to view: the electronic circuit diagram, the PCB and the Gerber file to be uploaded directly on the JLCPCB website.
- PCB (Printed Circuit Board): 7:27 (FRONT) - 7:33 (BACK)
- Circuit Diagram: 7:40
- Gerber Files (Ready for jlcpcb.com): bit.ly/2UIpkjn
*You can see the complete procedure to upload the Gerber file on jlcpcb.com from 1:50
**JLCPCB have a Technical Support for exporting Gerber files from many software at this link: support.jlcpcb...
For any other questions you can ask me for explanations in the video comments:)
WARNING: This video is only for demonstration. I don't take any responsibility for damage to things, people and animals.
Music:
- Iron Man theme (Intro JLCPCB)
- Every Step - Silent Partner (PCB Assembly)
- Soldiers by Vexento (Music Test)
WARNING: This video is only for demonstration. I don't take any responsibility for damage to things, people and animals.
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■ LINK
- KZbin: / stefano91ste
- Instagram: / stefano91ste
■ Do you want to Make a PCB?
Look this: • Vu-Meter 20 LEDs LM391...
#VuMeter #Electronic #Tutorial

[@dumitrubaluta7058]

a good project but my opinion is that the lights should be mounted on the opposite side of the components in order to be much easier to mount in an audio project

[@Stefano91ste]

Hi, if you want you can mount the LEDs by prolonging with wires to mount them in any box, I designed this board taking care of the design so that the PCB was beautiful to see.. I love doing this :)

[@marcusfred4480]

You could also mount the LED's on the edge of the board so the legs are bent over where they solder and edge mount in the front panel. Of course you would loose the curve design this way though.

[@Stefano91ste]

Yes, is another possible solution.

[@eugenepowe1117]

Cool. Good job. LED vu meters are my favorite especially when they respond to the audio and light up. 👍👍👍👍

[@Stefano91ste]

Hi, thank you :)

[@eugenepowe1117]

You're welcome. Wish I had one those vu led meter kits. They're awesome. 👍👍👍👍

[@gerardoaurilio3457]

ottimo come sempre bravo Stefano

[@Stefano91ste]

Grazie mille Gerardo:)

[@Stefano91ste]

PS: con il vu meter da 40 led sono indietro perchè non funziona perfettamente come vorrei, ma lo finiró💪🏻😁😁😁

[@mariodidier001]

I'm definitely using this! Thanks for sharing.

[@Stefano91ste]

Thank to you :)

[@electroniquepassion]

Super vu meter 👍

[@Stefano91ste]

Thank you!

[@didieralbertoparedeszarago2154]

Wwwwwoooooooo súper cool excelent .

[@thunderstorm82fry92]

Nice project, thumb up💪🏻

[@mancavemusician]

Great circuit and project files, I've ordered this project and the 20 LED one from JLCPCB! Can I take the music source from a headphone socket on my audio source?

[@Stefano91ste]

Hi, thank you! Generally the audio signal from the headphones is not enough, it would be better to take the signal from a pre-amplifier or an amplifier

[@electronic7979]

Very nice

[@Stefano91ste]

Thank You!

[@Davidslabofficial]

Amazing work. But if you add clipping indicator it will be more awesome

[@Stefano91ste]

Thanks, and thanks also for the advice, I'll keep it in mind for some future Vu-Meters ;)

[@Davidslabofficial]

@@Stefano91ste your welcome my friend keep it up

[@Kostanj42]

omg they have colors included in 2$ promotion!! i really have to make some projects now..

[@Stefano91ste]

Exact! it is so :)

[@betta67]

Nice! But it's the second time when you use caps much taller than the LEDs and also the IC's on the sockets. Whenever a display is involved LEDs, 7 segment or LCD you must take into consideration how that product/device will be encased or panel mounted. Dumitru Baluta also made a sensible comment, mounting the LEDs on the other side and I might add, the bar/peak jumper (even better a small switch) also. Choosing black PCB was a good choice as behind a smoked plastic those LEDs will look great. Keep up the good work!

[@Stefano91ste]

Hi, Thanks for the compliments :) - I use higher capacitors for two reasons: 1) I don't like lying down. 2) I have many types of capacitors, but I don't have any form of any value, and to save a little money I tend to use the components I have available. - Iif you want you can mount the LEDs by prolonging with wires to mount them in any box or panel, I designed this board taking care of the design so that the PCB was beautiful to see.. I love doing this :) - For the dot / bar mode I use a jumper so that it is easier to find it for those wishing to replicate the circuit.. unfortunately it is not always easy to find small switches. For the rest, I agree with you that a switch would be very convenient.

[@rosariorodrigues1469]

Is it possible to buy ready-made PCB's like that

[@Stefano91ste]

Hi, I only share the gerber files of my PCBs, I don't assemble them and I ship on commission

[@sinusoidalwawe7777]

Hace 30 años que yo monte el vu-meter cuando lo publicaron en la revista ELEKTOR.

[@josedominguez2021]

Superb!!!

[@Stefano91ste]

Thanks:)

[@kna60]

FYI, lowest components are to be placed first, in your case resistors and diode. Resistors should also be placed for easy reading, so with tolerance ring to the right ;)

[@Stefano91ste]

Right observation;)

[@CoquiAudio]

bro in mate black it does look amazing I think I'm gonna add that to my amplifier project bro thank you so much for sharing that is ❤ 😍 hey bro maybe later on you can try SMD VU meter that man would be an amazing man project too 😊

[@Stefano91ste]

Thank you very much, as soon as you finish your project I want to see it on your channel! The Matte Black is wonderful! SMD.. I don't know, they are very small to be welded by hand.. we'll see :)

[@CoquiAudio]

@@Stefano91ste 😊

[@leonidlonevy6233]

Beauty in simple!

[@Stefano91ste]

Thank you!

[@mariosergiogroetares9343]

Valeu! Grato! Excelente circuito, da confecção da PCI à montagem e o visual do VU... Boa noite!

[@AteuCu]

Boa-noite *

[@Stefano91ste]

Gracias:)

[@AteuCu]

@@Stefano91ste - Just correcting that wrong text, buddy... Lol

[@Stefano91ste]

Ateu Cu :)

[@user-wc2vj5dh7i]

Молодец,умница

[@Stefano91ste]

Thank You!

[@user-wc2vj5dh7i]

@@Stefano91ste Всегда пожалуйста,старина))

[@CHANDANKUMAR-em4rh]

Ok sir please Make BC547 transistor Vu Meter With circuit diagram 10 or 20 led vu meter

[@Stefano91ste]

I add it to the to-do list

[@avanishpratap9698]

Very nice project bro

[@Stefano91ste]

Thank you :)

[@MikyGyver]

spettacolo!!

[@Stefano91ste]

Grazie:)

[@1954charlie]

My Honor, Sir, I'm a very old man. You are a very smart and good professional. I did your vu meter ,1dioda at input and 2.7k resistors (2pcs). It's not sensitive enough (I'd use it as a preamplifier). Question ,don't the two diode inputs result in this higher signal level? In his first drawings were resistors 2.2k. Which is better? Thank you very much for your patience.

[@jamesrudacille7046]

Fabulous! Where may I order the kit?

[@Stefano91ste]

Hi, Thanks, this is not a KIT but a DIY project

[@EvgTiakaExT]

Великолепно!

[@Stefano91ste]

Tnanks!

[@1954charlie]

I've been working on what I use the vu meter for two years. My being should go in dot and bar mode as well. The drawing I made is Mr. Stefano91's drawing, it works nicely. My problem is that the amplification signal is not strong enough. I should hook it up to the speaker ,I bought a mini test amplifier ,go ahead,everything is ok. When I wanted to connect it to the 2x15w amplifier, the speaker is short-circuited and there is no sound. TDA7266 Audio Stereo Amplifier Module ,this small amplifier ,go,TDA7297 Amplifier Board AC/DC 12V 2x15W 15W+15W this is the other amplifier for which vu meter is made but does not want to go. I changed it so much that I grounded it, connected the outside of the knob to the gnd so that there would be no humming. What to do? With a 68-year-old head, what do I think of, I just started two years ago, or three years ago. Please someone help! I posted a video,please see,what is wrong,I have been trying your drawings for two years,now it would go,but it doesn't. Is the amplifier to blame?

[@juancarlosramirezgarcia9591]

Great job, is a great circuit, I have ordered 5 cards from JLCPCB and they have arrived in Spain in 8 days. I have assembled the circuit and it works perfectly. Thank you for your effort in sharing with us. Any ideas regarding making a box for this project?

[@Stefano91ste]

Thank you and have fun! I thought about designing a box for 3D printing, but then I never made it

[@juancarlosramirezgarcia9591]

@@Stefano91ste I have a problem with the VU meter when connecting the speakers it saturates and protects itself without raising the volume. I don't know if you can help me, do you think I should put a diode to negative and a potentiometer to regulate the sensitivity? Please, the project is great and I like it a lot, I want to use it in my amplifier.

[@Stefano91ste]

Hi, this is very strange. What type of amplifier do you have? Also try to check that there is no short circuit between the signal pin and GND pin

[@juancarlosramirezgarcia9591]

​@@Stefano91ste I think the problem was the amplifier, then one of the channels died, now it is working perfectly in another amplifier, I don't understand what was happening because I have connected it the same way as in the previous one and it works perfectly. What happened was that as soon as you put the speaker cables in, the signal went up to the bottom of the scale. All very strange. Thank you for you work.

[@Stefano91ste]

It is very strange, the only thing I can think now is that the amp has gone into some protection mode. Thank you for appreciating my work😁

[@samhanwaliyullah9124]

Nice video

[@Stefano91ste]

Thank you :)

[@PSHAX]

Just ordered the pcb's from JLCPCB... I remade the pcb files as there are a couple of DRC errors on the original..

[@Stefano91ste]

The PCB is working perfectly, what errors did you find?

[@PSHAX]

@@Stefano91ste Sprint Layout 6 showed lots of track size errors for the text, and the silkscreen for the caps and LED's was on the pads.. Also multiple nested holes / pads threw errors.. Nothing too major, took about 15 mins to recreate the .LAY file, and Gerbers / Excellon files..

[@justabasslover4404]

Can you make a video on how to design a pc board like for example an old home theater subwoofer amplifier and I want to have an extra so that when it breaks, I have an extra board and just creat a new one. Tell us what app to use and how to use them. This could help many people!. Thanks in advance.

[@Stefano91ste]

Hi, i have this video about How to design a PCB kzbin.info/www/bejne/raPIiH9socuma8U - but nothing specific like home theater

[@marcusfred4480]

Hi Stefano. Very good project. Very handy I.C. too. From memory I am not sure but is there a pin to select between liner and logarithmic display? Also how would one go about correctly calibrating the display?

[@Stefano91ste]

Hi, Thanks you :) No, the pin is to select between bar and dot mode and the didplay is already calibrated

[@decem_unosquattro9538]

Looks good !😀👍🏻 How about making an anolog VU meter. I like the anolog meters with warm lit round meters. They look kinda retro.

[@Stefano91ste]

Hi, thank you very much! I have not yet designed an analog, I have difficulty finding some components at the moment.. but I hope to be able to make one soon

[@decem_unosquattro9538]

@@Stefano91ste Yeah, I've been watching the news and yeah they're saying chips are becoming a problem to aquire. I hope that doesn't affect other consumer electronics parts like transistors, diodes, caps, resistors and other components. All this cvd bs is fkn annoying. Sigh. Anyway hopefully things return to close to normal again although I guess thats not really possible.😥

[@lilluminatoalternativo3926]

Lo hai progettato te questo vu-meter perché causalmente lo ho trovato condiviso con schema, pcb nel sito di Easyeda da un Russo..

[@Stefano91ste]

Ciao, si l’ho progettato io seguendo schemi ed indicazioni dei datasheet LM391X - se è uguale lo schema può essere un caso alla fine i Vu-Meter si fanno così. Il design del PCB però l’ho pensato da zero. Avresti un link giusto per curiosità? Ad ogni modo non sarebbe il primo ad impossessarsi di uno dei mie PCB, negli anni ho trovato altri KZbinr (anche più grandi di me in termini di iscritti) fare video sponsorizzati con produttori di PCB usando i miei PCB ai quali andavano a levare il nome. Ho trovato anche un sito turco, grazie alla segnalazione di un mio iscritto, che vende diversi dei PCB dei miei progetti, addirittura con su nome/ link al mio canale. Purtroppo ho sempre deciso di condividere gratuitamente il materiale da me creato e tutti i file per i PCB, volevo che fossero solo opensource in modo che ognuno potesse usarli a scopo personale o didattico, ma la disonestà è sempre dietro l’angolo… per questo ho smesso di pubblicare video e materiale contenente PCB

[@lilluminatoalternativo3926]

@@Stefano91ste non so se posso pubblicare link, spesso youtube o impostazioni dei canali youtube li cancellano in automatico come presunta spam

[@Stefano91ste]

Di solito i commenti con link vengono messi in revisione e riesco a vederli per approvarli, comunque postalo solo se non è un disturbo andarlo a recuperare =)

[@jakub2190]

Nice project i have made it on a breadboard. I am having small problem thou. How can I make this Vu meter responsive to weaker signals? For instance audio source from a mobile phone. This circuit is responsive only to a signal from computer or audio amplifier

[@Stefano91ste]

Hi, thank you! To use the phone signal (or other weak signals) you need to amplify the signal, I recommend using an LM386 as I did in these videos: Video 1: kzbin.info/www/bejne/e6mWqJR8mbalfrs Video 2: kzbin.info/www/bejne/gYivfXufet1_mZo

[@ferhat1916]

hi. dot bar link share please

[@sergeymistrugov6338]

Привет, подскажите пожалуйста ТРЕХВАЛЬТОВЫЕ смд светодиоды 0805 подойдут, будут работать?

[@josealbertolaurenciomendez5141]

Quiero conectarlo a un amplificador de audio como lo hago gracias

[@Stefano91ste]

- Hola, debe estar conectado en paralelo a uno de los altavoces. - Hello, it must be connected in parallel to one of the speakers

[@doriansolares1266]

Good video, algún integrado que tenga más capacidad de dB, -20dB hasta 20 dB o más, si es posible, gracias. Prolijo el trabajo en PCB, saludos.

[@Stefano91ste]

Gracias por apreciar mi trabajo!

[@jimbobimthyii8421]

Great video but what are the wires connected to at the bottom?

[@Stefano91ste]

Hi, they are VCC, GND and audio signal from amplifier

[@ken0x34]

You soldered in one of the 1uF Electrolytic caps backwards. The one on the left channel.

[@Stefano91ste]

Hi, the capacitor is connected correctly.. but unfortunately coming from a pack of cheap capacitors (40 cap. for 1$) the white line that should mark the negative is drawn not in correspondence of the pin - if it were connected wrong, the vu-meter would not work.. during the circuit assembly I considered only the length of the pins to distinguish + and - it was my mistake not to change the capacitor with a better one, I also explained it in another comment :)

[@thunderstorm82fry92]

The same thing happened to me... no more any economic components.

[@HoaNguyen-no5ob]

L stand for "Left", R stand for " Right" ??

[@Stefano91ste]

Hi, that's right

[@MrDunklerEngel]

Thumbs up but, The decay time of the LED's are too fast to use this as any measurement tool unless there is a peak hold, also there should be some calibration means.

[@Stefano91ste]

Thanks, replacing the 1uF capacitors with other 4.7uF capacitors can be slow down the LED decay time, but you wouldn't have the same effect with music.

[@MrDunklerEngel]

@@Stefano91ste you need a proper peak detect/buffer before it goes to pin 5, professional recording consoles have meters that decay at a pleasing to the eye rate but are also accurate due to the peak detect circuit. Your project looks good with the black pcb..

[@atzefatze]

...just ask. All the VU-Meters you made you never use a capacitor to avoid that the bar jumps back so quickly. Make it abit more smooth... Greetings

[@Stefano91ste]

To do what you ask just replace the 1uF capacitor with a 4.7uF one

[@ronalpaulgavidiagarcia4388]

Ola como ago para adquirirla las plaquitas

[@ringlis76]

Hello Stefano. My question would be, what you got (2x 1uF @ 25V Electrolytic Capacitor 1x 220uF @ 25V Electrolytic Capacitor) instead of 50v1uf and 16v 220uf is also good. I saw the video you're 100v 1uf on. Or I'd rather use 100v 1uf. Because there is no 25v 1uf.

[@Stefano91ste]

Hi, Using 100V capacitors because I have many with that range, using a 25V 1uF or 100V 1uF capacitor is the same, but if you use it at 25V your circuit should not be powered at more than 25V.

[@ringlis76]

@@Stefano91ste All right. Thanks for the reply. Have a nice day and gululate on the projects.

[@ShiblulMusicStudio]

I want to buy this complete circuit.....

[@Stefano91ste]

You can buy the PCB for this project on jlcpcb.com ( 10 PCBs for 2$ (USD) ) Download my PCB file here bit.ly/2UIpkjn and upload it on jlcpcb.com - You can see the complete procedure to upload the Gerber file on jlcpcb from 2:06 ..And buy the rest of the components on aliexpress for about 4/5 $ (USD)

[@Belajarelektro.]

what is the audio input, from the speaker output

[@Stefano91ste]

Hi, the vu meter must be connected to the amplifier in parallel to one of the speakers

[@asylmurat1]

Will the LM3916 work fine if the audio signal comes from the phone without an amplifier?

[@Stefano91ste]

Hi, it depends on how high the output of your phone is.. but in general no, the signal must be amplified.

[@premanshupradhan2887]

How to sat 10k presat

[@G_handle]

How do you calibrate the meters to ensure that -20 through 0dB are accurate to the incoming signal?

[@Stefano91ste]

Hi, the LM3916 is factory-made with that range (-20 +3 dB )

[@G_handle]

@@Stefano91ste Thanks for the reply, and great work. I get that those chips are set to those values. My question is: how do you calibrate the chips to whatever you're sending them? -20dB or +3dB is a bit like saying -20% or +3%. Percent of what? Without a reference point, it's meaningless. I imagine that those numbers are referencing voltage. IE: Pro Audio Line Level, 0dBVU is = +4dBU which is referenced to 1.23Volts. In Consumer Line Level 0dBVU is = -10dBV and I don't remember the voltage, but its significantly less. Mix those two up, and the meter is useless. I think what you're doing with these chips is fantastic, and I want to put them to use in my studio. But I need to know what information they're providing me, otherwise they're just pretty lights. Which has its place too!🙂

[@ErreEffe]

Have you ever made something with thermoionic tubes?

[@Stefano91ste]

Not at the moment

[@ErreEffe]

@@Stefano91ste I wait!😁

[@ringlis76]

Hello. What is the audio signal input connected to? Pc Sound Card Or Earphone Output Or Amplifier? What ohm (4.6 8) and how much power does the amplifier have?

[@Stefano91ste]

For this video i use a 4/8 ohm amplifier with 35W per channel

[@ringlis76]

@@Stefano91ste Thanks for the reply. I look at it with such performance. Because pc audio output only works with the first led.

[@Stefano91ste]

Good, to connect it to a weak audio output you need to add a preamplifier

[@ringlis76]

@@Stefano91ste Yes. Unfortunately, pc audio output is not enough for her. It works well so it doesn't need any more tools. :(

[@RahulSharma-gm3li]

hey, why u used 4007 diode in series in signal ? will it work really ? i think diode will make Ac signal to DC,

[@Stefano91ste]

Hi, without that diode the lighting of the LEDs does not take place good as in my Vu-Meters

[@RahulSharma-gm3li]

@@Stefano91ste okk,, Thanks for Your reply and thanks this an awesome project. I will really try to make this one

[@adeshkumar5534]

I think u must have used different color leds for diff levels

[@Stefano91ste]

Hi, you can use LEDs of any color, having already made various vu-meters with the standard colors for this I decided to use an ultra-bright green. Also to maintain a nice contrast between the black of the PCB and the green of the LEDs :)

[@A5A5A5A5h]

Bel progetto! i due LM3916 si pilotano tranquillamente anche senza un preamplificatore?

[@Stefano91ste]

Ciao, proprio tranquillamente no, senza un pre amplificatore (anche realizzato con un LM386) se collegato ad esempio ad un cellulare si accendono solo i primi led, mentre con alcuni lettori dvd ho notato che funziona normalmente

[@A5A5A5A5h]

Electronics Projects - Stefano91ste Capisco...per caso hai mica realizzato un PCB con relativo LM386? Sarebbe interessante vederne uno completo.

[@Stefano91ste]

Su PCB non ancora, ho realizzato questo kzbin.info/www/bejne/gYivfXufet1_mZo su basetta millefori funziona con un LM386 (Preamplificatore) collegato ad un Vu-Meter da 20 LED (2 LM3915 in serie).. verso la fine del video puoi vedere lo schema.

[@rajeshnair2595]

Mr Stefano Greetings from cochin kerala🙏 I have requested Gerber files for your 3 ic circuit earlier. I need files of these too ..stereo circuit using 3916. Thanks a lot 🙏

[@Stefano91ste]

Hi, you can download this gerber files from video description

[@HarpreetSingh-yo9ir]

GOOD WORK DUDE. I WANTED TO MAKE RPM METER USING THIS. BUT I AM GETTING PROBLEM WITH THE 7 AND 8TH PIN. I AM PREETY MUCH CONFUSED HOW TO CALIBRATE THIS IC's because i am going to cascade the 3 LM3914. CAN YOU PLEASE HELP??

[@Stefano91ste]

Hi, Thank you:) - Precisely what is the problem with pins 7 and 8? If the problem is that you have to remove an LM, take my circuit and delete the fourth LM3915, then redo the fourth links on the third.. I hope I explained myself well. - I did a tachometer a few years ago but with 20 LEDs: kzbin.info/www/bejne/gaDap2Ckf9OLbdE

[@HarpreetSingh-yo9ir]

@@Stefano91ste sir i am using lm2917 to convert the frequency from the ignition coil to the voltage . There is a potentiometer connected to it by which i can vary the output . But the problem is i dont know how to connect potentiometer to LM3914 to adjust its senstivity according to the voltage. Because i dont know which pin control its senstivity because i am using 3 lm3914 for 30 led. Can you provide me the accurate information.

[@Stefano91ste]

The potentiometer that you already have on the LM2917 should suffice, alternatively on the LM3914 try to connect a potentiometer in series with the input signal.. I'm not 100% sure it will work, but I would do it

[@HarpreetSingh-yo9ir]

@@Stefano91ste thanks for your valuable reply

[@HarpreetSingh-yo9ir]

@@Stefano91ste sir i wanted to blink all the led if the rpm reach at red led's( at higher rpm) can you please tell me how can i do this. Or can you provide me a circuit.

[@cecilatwelljr.389]

I was wanting to know what kind of pins are you using for power and signal and where to buy them...

[@Stefano91ste]

Hi, are these: it.opitec.com/opitec-web/articleNumber/319032/zz/cID/c3I6YW5jb3JhZ2dpOQ==

[@cecilatwelljr.389]

@@Stefano91ste is there any way to get the web site attachment to read in english....

[@Stefano91ste]

Unfortunately I don't know how to do it, the site has only Italian and German as a language

[@aglcanaldejuegos4383]

Ciao Stefano, it is posible to replace l and r entries by an electret????

[@Stefano91ste]

Hi, If I understand correctly, do you intend to use it as a voltmeter? in that case it is possible, and I also advise you to use LM3914 instead of LM3915/16

[@aglcanaldejuegos4383]

@@Stefano91ste voltmeter no, as a vumeter, I have many electret and I want to use it.

[@aglcanaldejuegos4383]

Hi Stefano, I received my first prototypes from JLCPCB (You can see it on egonzalez.es/Electronica), I have add all components to the prototype but I think I have problems with input VCC. I have a 9V font, but how many A/mA I need to this prototype ??? Thanks in advance.

[@Stefano91ste]

Hi. Goood work! - Difficult to tell you exactly how much current it can consume, however a 9/12V DC power supply with a current of at least 800mA/h should be more than enough .. (My 40 LED Vu-Meter absorbs 500 mA of current with all the LEDs on)

[@aglcanaldejuegos4383]

Ciao, Stefano, and thanks for you patience... Mystery solved. Before send the prototype to JLCPCB, I think the secondary IC was moved by an error, as a consequence some tracks to secondary IC, I can see not maching in IC holes exactly. I'm trying to solve it.... The other problem I have see is that the sound signal have to be amplified before to connect to circuit. Thanks other time for your patience. Finally, it works, but only left channel, right channel continues without work. Even I've cut the part that had the contacts moved and I have rebuilt this part with cable and a piece of a pre-drilled plate but I can't get it to work either. Tomorrow I will see to rebuild that part again. I want to avoid having to resubmit the design for manufacturing until I am sure it works. But if the left side works, the right should work. You have made it works.

[@PSoundKH]

Where is the best selling electronics?

[@Stefano91ste]

What?

[@gabriellereblora9321]

Can I use 12v dc?

[@Stefano91ste]

Yes sure

[@DustinWatts]

Nice board! What is 0vu referenced to? How many volts?

[@Stefano91ste]

Thanks, this board works with 9/12V DC

[@PeterMilanovski]

I think that he means 0db.... Not the power supply voltage.

[@Stefano91ste]

No, the dBs indicate the measurement scale of the audio signal

[@PeterMilanovski]

Electronics Projects - Stefano91ste yes and the signal is a voltage.... and because you have used the db (Decibel) scale, 0db needs to be referenced to a certain voltage.... otherwise you could have marked the scale to represent output power in watts... also.... you really should have included two trimmer pots to be able to adjust the level... for example... if I were to connect this meter to a CD player's line level output, I would play a CD that has a 1kHz signal burned onto it and then I would adjust the level on the meter to the 0db point so that I can see which CD's have been recorded properly... that's why the last two led's are meant to be red and the one in between the red led's and the 0db point is Orange.... the power led should have been included at the bottom of the level led's, that way you end up with rows of 11 intended of 10... and never have the word professional on your product, everyone knows that if it says professional.... it's probably from China and it's not professional.... otherwise! great job, it looks really good but the led's should have been installed on the back side... I have a graphic equaliser that was made in China and the potentiometers can't be mounted to the front panel because the capacitors and the other components are in the way... but that's Chinese intelligence for you....

[@Stefano91ste]

Dustin Watts - OK, I didn't understand what you meant to ask. This is a 0V to 10V Vu-Meter, so 0dB (LED 7) corresponds to 7V.

[@gsingh8548]

How can I get this kit. Please help

[@Stefano91ste]

Hi, this is not a kit. You can buy the PCB for this project on jlcpcb.com ( 10 PCBs for 2$ (USD) ) Download my PCB file here bit.ly/2UIpkjn and upload it on jlcpcb.com - You can see the complete procedure to upload the Gerber file on jlcpcb from 2:06 ..And buy the rest of the components on aliexpress for about 4/5 $ (USD)

[@joaoess0]

Não tem como comprar a pcb pronta tem que fazer o projeto e enviar a parte mais chata é fazer o projeto assim não compensa se tiver este vu pronta passa o link para eu comprar

[@Stefano91ste]

- Hi, in the video description you will find the link to download the PCB files ready for JLCPCB, then follow the instructions in the video for the purchase on JLCPCB. - Hola, en la descripción del video encontrará el link para descargar los archivos de PCB listos para JLCPCB, luego siga las instrucciones en el video para comprar en JLCPCB.

[@Stefano91ste]

@Ate Cu - Unfortunately some users ask me to send them the ready assembled circuit, not considering that my channel is not a store, but wants to teach something about the world of DIY electronics. Then what I publish here I realize for passion in my free time, it would be impossible for me to make circuits on commission, at low price and send them all over the world xD.. I must ask you not to write insults against other users, otherwise KZbin could penalize my channel :(

[@AteuCu]

@@Stefano91ste okay.. you're right.. i apologise you.

[@JBSATE]

tem o esquema amigo abc

[@Stefano91ste]

Hola! Look at 7:40 in this video for the Circuit Diagram :)

[@bhushannaitam1321]

Sar circuit daigram kaise banana hai (mirror) ya usaka video upload karo

[@Stefano91ste]

English please

[@ElectroGuruji]

Mirror printout lena hai. Mirror printout should be made using Laser Printer on Photo paper. kzbin.info/www/bejne/jpjEeIuEpt6ib8U

[@shanchoyferdous]

Can I us LM 3915 ?

[@Stefano91ste]

Yes, but the dB scale printed on the PCB will no longer correspond to the LEDs

[@imamagustian6103]

Capasitor 100v 1uf and (,,,,,,v) 220uf???

[@Stefano91ste]

25V is perfect, (even 50 / 100V are ok)

[@imamagustian6103]

Oke tanks,,😁

[@demm45]

Мне кажется, что индикация линейная, а не логарифмическая. Это милливольты, а не децибелы.

[@user-kq6ne1gc2j]

Так и есть. Для логарифмической индикации используется другая микросхема LM3915.

[@Stefano91ste]

@demm45 - No it is in dB, as indicated on the LM3916 datasheet

[@demm45]

В любом случае красиво. Спасибо за видео.

[@Stefano91ste]

Thank you

[@abhishekm2997]

Sir where vu pcb meet me

[@Stefano91ste]

Hi, I do not understand

[@ElectroGuruji]

Sir, it is Mostly used in Audio applications.

[@abhishekpatra9329]

How much???price

[@Stefano91ste]

You can order 5 of this boards on jlcpcb for 2$ + ship

[@Mindfulthinker060]

how can i order this through jlpcb?

[@Stefano91ste]

Hello, follow this simple procedure: 1) Register an account on JLCPCB ( jlcpcb.com ) 2) Download gerber files for this project: bit.ly/2UIpkjn 3) Upload gerber files on JLCPCB (Follow the upload procedure in this video starting at 2:08) 4) Chose PCB color, quantity ecc as you prefer 5) Complete your order - Remember to enter your shipping address correctly - Here the payment methods accepted: support.jlcpcb.com/article/31-what-payment-methods-are-available - Here shipping methods: support.jlcpcb.com/article/27-shipping-delivery

[@aamiaudios2125]

Can i make this with LM 3915

[@Stefano91ste]

Sure, it also works with LM3915, but the dB scale printed on the PC will no be valid

[@aamiaudios2125]

But yesterday i make this at my Home and i failed please help me..... It is not working how i contact you....

[@aamiaudios2125]

Please share your Facebook name or whatsapp number

[@Stefano91ste]

Hi, why not working? You can ask me what you want here in the video comments

[@abelflores2536]

1 ci bastava

[@Stefano91ste]

Ho molti altri video con vu-meter a singolo canale....

[@marcelostabilekabeya6852]

👏👏👏👏💣💥🔥🔥🔥😍😍😍

[@bhushannaitam1321]

Daigram ke liye konase aap ka us karana hai video ke jariye batado

[@Stefano91ste]

English please

[@bhushannaitam1321]

Sar how to make diagrams and which apps are to use for the diagram (video)

[@Stefano91ste]

For electric diagram i use Multisim. For PCB i use Sprint Layout 6

[@marcolabriaga653]

send pcb shematic diagram plz

[@Stefano91ste]

Find everything you need in the video description

[@carlosrubio6141]

Como se llama la música?

[@Stefano91ste]

Music: - Iron Man theme (Intro JLCPCB) - Every Step - Silent Partner (PCB Assembly) - Soldiers by Vexento (Music Test)

[@abhishekm2997]

I am buying on pcb

[@abhishekm2997]

One pcb you send me

[@abhishekm2997]

He is very important on me

[@Stefano91ste]

Hi, in video description you can download the PCB files to upload to JLCPCB, to buy the board.

[@ElectroGuruji]

Sir it is possible to make the PCB at home also.

[@josealbertolaurenciomendez5141]

Pueden ayudarme con eso

[@Stefano91ste]

Hola, cuál es el problema?

[@Aliceroom_11]

e quanto uma placa desa

[@Stefano91ste]

- Hi, The minimum is 5 pcb for 2 dollars. - Hola, El mínimo es de 5 pcb por 2 dólares.

[@DrEvil-lv8us]

Для ПРО диапазон -20+3дБ - мало! Надо минимум 45, а по госту 60!!

[@Stefano91ste]

Please english, I can not translate

[@suicide855]

Зачем ты англоязычному человеку пишешь на русском языке, да ещё про какие-то ГОСТы? Он никогда не поймёт и не переведёт это

[@suicide855]

@@Stefano91ste hi! An approximate translation is: "For the PRO -20/+3dB range - very little! You need at least 45dB, but according to the norms 60dB!!" Thank you for very good work!

[@Stefano91ste]

Thank to you! it's true, but using a single LM3916 you are limited like this.. using two LM3916 you can expand up to 70dB.

[@DrEvil-lv8us]

@@suicide855 Представляешь - нашел и перевел. И даже правильно мне ответил...

[@joaodimasribeiro8815]

That is not a tutorial.

[@Stefano91ste]

Ok

[@tananton6515]

andai lampu lednya dibikin warna yg berbeda

[@Stefano91ste]

You can put the leds of the color you want

[@mauriziomascagna]

Che saldatore è?

[@Stefano91ste]

Ciao, è un saldatore di una marca che si chiama GHB, lo sto usando da più di un anno. Questo: kzbin.info/www/bejne/eaqco6OqmLhjr7c

[@mauriziomascagna]

Giusto per sapere. In rete vedo bellissimi progetti elettronici, spesso "guastati" da sufficienti "utensili" da lavoro. Io uso questo da oltre 20 anni it.rs-online.com/web/p/stili-saldanti/1455782/ Va che è una bomba,non mi ha dato mai nessun problema. E come stagno il Felder "RA05". Lavorarci con questi due articoli è un piacere assoluto!

[@Stefano91ste]

è un bel saldatore, ma dipende sempre dall'uso che uno ne deve fare.. per un uso hobbistico coma faccio io questo è perfetto, piccolo e comodo da usare.

[@kosanya]

5:02 change + -

[@Stefano91ste]

Hi, the capacitor is correctly inserted, I distinguish + and - mainly by the length of the pins. If it were connected wrong the left Vu-Meter would not work;)

[@Bajran_]

@@Stefano91ste kosan is right. The capacitor is incorrectly mounted.

[@kosanya]

@@Stefano91ste will work but not right 7:23 look at the capacitor and the board

[@Stefano91ste]

I checked, the capacitor is connected correctly.. but unfortunately coming from a pack of cheap capacitors (40 cap. for 1$) the white line that should mark the negative is drawn not in correspondence of the pin - if it were connected wrong, the vu-meter would not work as well as the first ones I made, (like this my old and orrible video: kzbin.info/www/bejne/anTWmImil9BsqtE ) and the capacitor would be in a short-circuit situation. therefore in presence of signal it would overheat up to burn. During assembly I considered only the length of the pins to distinguish + and - it was my mistake not to change the capacitor with a better one :)

[@kosanya]

@@Stefano91ste ок )

[@aghrisaprayoga7577]

WA DI HUBUNGI PENTING?

[@Stefano91ste]

Hello, I do not understand, please write in english

[@aghrisaprayoga7577]

The vu meter item can be purchased? What must be done in order to get the goods

[@Stefano91ste]

Hi, in video description you can download the PCB files to upload to JLCPCB, to buy the board.

[@aghrisaprayoga7577]

Number dialed to buy the item what is the price of the item?

[@Stefano91ste]

2$ for 10 board (Only the boards without components)

[@user-gn4sn9se3q]

Уже устарело. Вот VU-Meter kzbin.info/www/bejne/honapnhrg85lsJo

[@Rahulkumar-yv3xy]

1

[@nickfatsis9607]

Professional? no, this is a basic circuit that's been around for over 40 years, there's no trimpot for sensitivity adjustment, there's not even any peak hold feature!

[@lmario82]

CHI SA PROGETTARE VEDE 20 ERRORI IN QUESTO PROGETTO, INCAPACI...

[@Stefano91ste]

Salvatore Mario Maugeri qui l’unico incapace sei tu!

[@lmario82]

@@Stefano91ste infatti... se non li noti lo sei proprio tu... io accetterei le critiche. E fidati. Hai sbagliato un componente.

[@Stefano91ste]

Salvatore Mario Maugeri Le critiche sono una cosa, gli insulti e la poca educazione un’altra. 20 errori?.. ho sbagliato un componente? quale? E per quale motivo è sbagliato? Rendiamo utile questa critica, spiega come e perchè ho sbagliato, argomenta.

[@lmario82]

@@Stefano91ste Misura led da 5mm. non si puo inserire , tantomeno quello da 3mm. fuori passo. sei felice adesso? -.-

[@Stefano91ste]

Credo che a questo punto sia inutile dirti che ho progettato questo PCB solo per led 3mm e che la distanza tra i led la puoi fare come vuoi, per fini estetici.. Mentre il componente sbagliato? E gli altri errori? Dai sono curioso.. argomenta un po! Il tuo primo commento scritto in maiuscolo e con quel tono va giustificato con argomentazioni valide. Oppure devo pensare che tu sia un leone da tastiera.... 🤔