Vu-Meter 40 LED on PCB with LM3915 TUTORIAL

[@tonyd1149]

Just beautiful. Thank you so much for providing the method of submitting PCBs and to a recommended manufacturer for production. (You're a great teacher). Tante belle cose, Stefano. Ti ringrazio.

[@Stefano91ste]

Thank you! Grazie a te 😁😁😁

[@juanjobravo4476]

Excelent! but if you need accurancy reading of db, is possible to calibrate de signal maybe if use a trimmer ?

[@andreabetti9018]

certo una cosa fatta da soli è una soddisfazione, forza io ti aspetto! Sei un Grande!

[@Stefano91ste]

Thank you all for 25.000 Subscribers, a quarter of the way to 100.000 Subscribers!!!

[@TrungNguyen-mn7kq]

Tôi muốn mua phải làm sao ạ

[@Stefano91ste]

Hi, You can Buy from jlcpcb.com 1) Download the project files (link in video description) or here: bit.ly/2Z1Uj84 2) Register on jlcpcb.com/ if you don't already have an account 3) Follow the procedure in this video starting from 1:33 NB: You can choose the color you want for the board.

[@electricalengineering6159]

Pcb ap se may kayse launga

[@spoiled_kitten]

Hey there. So a bit of an ask but I was wondering if I could get the project files that u made the pcb with. I want to add an amp into it and have it share the same pcb but can’t seem to use gerber files for that. I am willing to pay a little. If so that would be insane! Take care. Blake

[@mancavemusician]

@@spoiled_kitten they are in the youtube description held on google drive

[@bradricketts6091]

Can this VU meter be connected to line level signals and not the output of an amplifier? I want to add a VU meter to a Mixer board to monitor the output of a microphone before it is sent to the main output channel of the mixer board.

[@RachmanLusana]

Love the big text. I able to read. Thanks for Scheme n layout at end of frame

[@Stefano91ste]

Thank you for appreciating my work :)

[@manoranjan8114]

Sir ek pcb vu meter mujhe chaiye

[@loicmentha4224]

Sorry for that stupid question, just read the lm 3915 datasheet :) . So as the pin 9 is connected all the way to pin 3 on the pcb, the only solution to isolate the pin 9 and have a dot mode on that pcb is to unfold the pin 9, and instead of soldering it on the pcb, to connect it to a switch, right?

[@Stefano91ste]

Hi, what you say would work only with an LM3915, for the DOT mode of more LM3915 in cascade the situation becomes more complex. This is because when you have more LM3915 in cascade activating the DOT mode the last LED of each LM3915 stays on and you have to find a way to turn it off. In the past I made a vu meter with 20 LEDs and the working DOT mode, this is the video ( kzbin.info/www/bejne/gYivfXufet1_mZo ) in the diagram we see the solution I adopted, but I never applied it on big vu-meters for now. The solution is the two resistances: 1K near PIN 11 of the first LM3915 and 330 ohm near PIN 1 of the second LM3915 - NB, Drawing that diagram I made a small mistake: the 1K resistor on LED 9 must be connected to the cathode (not anode)

[@loicmentha4224]

@@Stefano91ste OK thanks a lot for all these informations :) . But I can see on this diagram u used one 120ohm resistor per led, is it absolutely necessary ?

[@Stefano91ste]

Hi, they are not mandatory, the LM3915 have an internal resistance.. I put them to further limit the power consumption.

[@barot67]

Buongiorno Stefano, scusa, ho da chiederti da inesperto cosa usi come input del segnale. Ho provato con max 4466 e un modulo con microfono ma non funzionano, nel senso che non gli arriva il segnale o e debole Ho provato il test e i led si accendono..il tutto fatto solo come uso personale per imparare grazie

[@janwaldmann5367]

Anmerkung zum Schaltplan: Der Dip-Schalter / Test-Schalter ist im Schaltplan nicht aufgeführt. Wie ist dieser verbunden?

[@Stefano91ste]

Connect +V to the pin 5 input

[@loicmentha4224]

Thanks a lot for sharing this project ! I built this one and the other one with 20 led's, but I have the same problem on both. The 5 first LED's stay lit even if nothing is connected to the input. I tried to change the 10k/100k resistor with different values, but according to the value there's still 2 or 4 or 6 or 7 LED's who stay lit. Any solution ? thanks in advance !

[@Stefano91ste]

Hello, thank you very much! I found this problem only by powering the vu meter with a low quality (or not well filtered) power supply.. for example by powering it on battery or with my power supply everything works well.

[@loicmentha4224]

@@Stefano91ste thanks for your quick answer ! I use 9v battery, but I still have this problem.. I tried to change the value of the 10k/100k resistor but there's still some LED's lit. Is it possible that the problem comes from a bad connection or welding ?

[@loicmentha4224]

@@Stefano91ste I used 50V capacitors as I didn't have 10/16/25V, could it be the issue ?

[@Stefano91ste]

No, it is not for that, it is that having such a high range of LEDs the Vu-Meter is very sensitive, and therefore it can happen that it displays some disturbance.. the thing I do not understand is why this problem occurs only to some and not to all.. But I will find a solution!

[@loicmentha4224]

@@Stefano91ste Gonna build another 40LED's vu meter this afternoon as I ordered 5, I'll let u know if I have the same problem!

[@HarpreetSingh-yo9ir]

Hello sir. I made rpm meter by the above configuration. And i have used lm3914 3ic's. I am getting problem . When i give dc supply to the ic, led turn on from starting to end. Without any signal voltage. My signal wire isnt connected to anything

[@Stefano91ste]

This is just a Vu-Meter, there is a whole circuit missing (LM2917) to be able to use it as a display for a tachometer

[@barrywhitlock6680]

This is great. I have a 1/14 scale box trailer and would like to put this type of lighting into it without a remote control or an electric power supply, Would this work on just a battery pack? and what sort would you advise as I am a complete novice,

[@Stefano91ste]

Hi, Yes it also works with battery.. you need a battery between 7V and 12V, for example two 18650 in series would be fine

[@barrywhitlock6680]

@@Stefano91steThank you so much that's great to know.

[@thesillyhatday]

This wiring method only works for the LM3914 as it is a linear. The LM3915 has a logarithmic scale. The resistance value between the comparitors, are not equal. Watch carefully and you can see each bank of 10 LEDs is quicker to change at the bottom than towards the top. That and a VU meter slows down as it reaches the peak. Due to the logarithmic scale. Yes it works and looks good, but it is not an accurate VU meter.

[@spoiled_kitten]

Hey there. So a bit of an ask but I was wondering if I could get the project files that u made the pcb with. I want to add an amp into it and have it share the same pcb but can’t seem to use gerber files for that. I am willing to pay a little. If so that would be insane! Take care. Blake

[@Stefano91ste]

Hello Blake, I only share the gerber files and the schematic, if you want, from the schematic, you can redraw your own PCB

[@spoiled_kitten]

@@Stefano91ste damn okay. Algd. Also have you thought of making like a 32 band analyser. I saw a video but don’t think it uses the same board as this but was so cool

[@MahmudulHasan3044]

Looks so satisfying!! love it.

[@Stefano91ste]

Thanks:)

[@depup2404]

Nice build. I just wanted to ask if it works with smaller amps(20 watts) because in my testing it does not work with amp(20watts), but works with a greater output of minimum 50w, maybe the reference voltage is too low or something else...

[@Stefano91ste]

Hi, for testing I use a 35w amp and it works more than well

[@richeck328]

Very nice project, love this so much I placed an order with JLCPCB with your Gerber files for 20 boards then designed a case useing open scad for a duel and a single channel display. Wish I could upload photos and the stl files here. I got the case with 2 alternative front display panels and 2 alternative back panels with cutouts for all input components. I used a 50k ohm potentiometer to adjust the input levels in the final project. Guess ill have to post a video and files on my youtube channel and provide a link here.

[@Stefano91ste]

Hope to see it soon! thank you for appreciating my work :)

[@juango47]

Amazing work, I´ll tray to make one!

[@Synthematix]

The lm3915 produces a part log output which is no good for line level audio, you need to use the lm3916 for a log scale

[@estrafalopio]

Estefano, where can I bought the header pins in PCB (VCC - GND - Input)? Thank you.

[@Stefano91ste]

Hi, i buy it here: www.opitec.it/Macchine-utensili/Saldatore-da-stagno-accessori/Stagno/ancoraggi-p-circuiti-stampati-argentati-1mm-100-p.html?listtype=search&searchparam=saldatore&pgNr=1

[@enricocavaglieri]

Ciao Stefano avrei bisogno di un tuo parere ..ovvero ho appena completato il progetto dei vu meter 40 Led e funziona perfettamente pero' mi chiedevo se c'era il modo di "rallentare" lo spegnimento dei led ? in breve rendere piu' fluida la progressione di accensione/spegnimento della barra.Ho confrontato il funzionamento con il video demo per controllare che non abbia fatto io degli errori di assemblaggio ma e' perfettamente identico. Ammesso che si possa hai qualche suggerimento da darmi ? GRAZIE CIAO

[@Stefano91ste]

Ciao Enrico, Per rendere lo spegnimento dei LED più fluido si potrebbe sostituire il condensatore elettrolitico da 1uf con uno da 2.2uF, mentre per l'accensione è un po più complicato, perchè gli LM3915 hanno un range massimo di 90dB da suddividere su 30 LED, ed avendo ingrandito il vu-meter purtroppo non si raggiunge il range dei 120 dB, ma rimane quello da 90dB spalmato su 40 LED. Una soluzione possibile sarebbe quella di far pilotare i 4 LM3915 da un microprocessore anziché collegarli direttamente alla fonte audio.

[@enricocavaglieri]

@@Stefano91ste Grazie Stefano !!!

[@vade7424]

Hello there, do you know how to add an adjustment for a specific frequency? Thanks!

[@Stefano91ste]

Hi, a dedicated filter must be designed for each frequency

[@acf2802]

LM3915 is 3dB per output. So, with 40 LEDs that would be 120dB, which is unrealistic, and it certainly doesn't seem to be responding in that range. What's the actual range?

[@Stefano91ste]

Hi, as I wrote in the video description: "This Vu-Meter is composed of four LM3915 in cascade, for a total of 40 LEDs and a range of 90dB" (The maximum range that can be obtained by connecting the LM3915 in cascade)

[@Jay.ar30]

@@Stefano91ste PCB size sir

[@andreabetti9018]

ciao Stefano, ti dico una cosa che potrebbe interessarti, se ti mando uno schema, puoi trasformarlo in file gerber, ? ho anche il circuito, eventualmente te lo spedisco, si tratta appunto di un vu meter a 20 led con funzione dot/bar, cosi poi ce li facciamo stampare questo circuito, cosa ne pensi?

[@Stefano91ste]

Ciao, non posso disegnarlo io, ne ho già in programma uno con quelle caratteristiche.. ma se hai bisogno qualche consiglio per programmi di disegno PCB puoi chiedermi

[@HarpreetSingh-yo9ir]

SIr can you please tell me how to adjust senstivity of these lm3914. where should i have to connect potentiometer to adjust the led senstivity?

[@Stefano91ste]

you can add a potentiometer in series with the audio input

[@Sgt_Hest]

You should make one that separates frequencies

[@Stefano91ste]

is a vu-meter, no need to separate frequencies

[@bharatyadav8931]

Very nice project. thanx for detailed discription...

[@geoffbaillie8442]

Hello Stefano, which resistor is the 100k, is it the one marked 10k? As I don't have any on the PCB marked 100k.

[@Stefano91ste]

Hi, is the one at the bottom right, on the PCB I have already marked as 10K

[@geoffbaillie8442]

Thanx M8.

[@saldrow935]

Excellent finished product. Any chance you sell bare boards for us to assemble? Thank you for your consideration. Keep up the fantastic videos!

[@Stefano91ste]

Hi, I can't directly sell PCBs, also for this I share the gerber files

[@badeakabha2457]

Very good project 👍

[@Stefano91ste]

Thank you!

[@RaptorAvril]

Could you please tell me where you got the pins from which you use on the power and input to connect the crocodile clips to. Been trying to find some exactly like that. Many thanks.

[@Stefano91ste]

Hi, I bought them on this site: it.opitec.com/opitec-web/articleNumber/319032/zz/cID/c3I6YW5jb3JhZ2dpOQ==

[@rms-repairmainanseremban8403]

whats the name of that pin?

[@hemantwarhade848]

Can we use 4 x LM3916, instead of 4 x LM3915 ? Can I purchase the PCB from you ? If 'yes' then price ? and How to pay ? Thanking you Sir for your nice illustration !

[@Stefano91ste]

Hi, no, from the datasheet the LM3916s can be connected in cascade with a maximum of 3 pieces. I don't sell PCBs, but in the video description you can find the gerber file with which to order PCBs on JLCPCB ;)

[@TheSekolee]

Where is the test button schema

[@spoiled_kitten]

What led type do you need? Or will any work?

[@Stefano91ste]

Hi, all types of standard 3/5 mm LEDs are ok

[@spoiled_kitten]

Awesome! Thank you so much for the reply!

[@spoiled_kitten]

Do you have a patreon or some way I cans support you?

[@Stefano91ste]

Thank you for appreciating my work on KZbin! I have nothing like that, apart the merchandising on my channel and some banggood affiliate links. My channel is, and always will be, Free! To support me leave a like, a comment and share my videos :)

[@lucanissoli9901]

Ciao Stefano, ottimo lavoro. Ma come funziona col circuito stampato, lo devi fare tu e poi mandarlo a stampare? Cacchio che bello ma complicato per me visto che di pc non me ne intendo. Mi potresti aiutare? Te ne sarei riconoscente. Luca. Like meritato e iscritto

[@Stefano91ste]

Ciao Luca, grazie mille!:) Il circuito stampato l’ho disegnato io, è un PCB a due strati (layer) - in descrizione video trovi il link per scaricare i file gerber del pcb, così puoi farlo realizzare da qualsiasi produttore di PCB, io ovviamente ti posso consigliare JLCPCB :) - scegli il colore che vuoi tu per la board, e puoi modificare a tuo piacimento parametri come spessore del pcb e rifiniture. I componenti invece li prendi tu dove preferisci tipo negozi, fiere (quando riprenderanno) oppure online.

[@enzocicatelli6691]

Ciao stefano. Un lavoro bellissimo grazie. Volevo chiedere, si possono usare qualsiasi colore x i led? Oppure bisogna rispettare i colori indicati x via delle tensioni? Grazie di cuore x questa opportunità che mi hai regalato ❤❤

[@Stefano91ste]

Ciao, grazie mille😊 Se usi LED normali puoi usare quelli del colore che preferisci.

[@enzocicatelli6691]

Grazie Stefano. ❤

[@uemersonmoreira5082]

otimo v.u ele funciona com 12 volts ?

[@Stefano91ste]

Thanks!! Yes, 12 volts is Ok

[@muthukumars3899]

Good design, nice work I like it Can you have more than one line led three or four lines

[@pierch99]

très beau travail de pro.....

[@moristo]

Will be better if you make it into 2 modes (Dot and Bar).

[@Stefano91ste]

Hi, I couldn't get the dot mode to work properly so I preferred to keep only one. Problem is, I can't get the dot to work from the third LM3915... but in the future I will solve this thing.

[@moristo]

@@Stefano91ste I have done my experiment Peak hold vu meter use single IC LM3914/5/6

[@fotonills6930]

QUAL LINK DE VENDAS NA SHOPEE?

[@andreabetti9018]

Buongiorno e Buona domenica Stefano, ti chiedevo hai mica un progetto simile a questo ma con funzione "dot"? Grazie.

[@Stefano91ste]

Ciao, buona Domenica anche a te! Con funzione DOT a 40 LED ho questo: kzbin.info/www/bejne/iXarmXeFitGCl80 (verso fine video ho inserito lo schema, non ne ho ancora fatta una versione definitiva su PCB. altrimenti come 40 LED su PCB ho solo questo. Poi ho Vu-Meter a 10 o 20 LED con DOT/Bar mode, tipo questi: - kzbin.info/www/bejne/gYivfXufet1_mZo - kzbin.info/www/bejne/e6mWqJR8mbalfrs - kzbin.info/www/bejne/iYWloYegiahmjqc - kzbin.info/www/bejne/bZLZk2xmaqtgg7M - kzbin.info/www/bejne/omnShoSmfKaCedk

[@rightstufff]

what is the input voltage range?

[@Stefano91ste]

Hi, is 8 to 15V DC (9-12V recommended)

[@bassmekanikproboosterz7791]

Very good! Hola soy d argentina buenos aires. Excelente el proyecto. Queria saber si este circuito aguanta para otros 40 leds en paralelo o serie como armar en estereo. Gracias seguidor de su canal. Me gustaria si se puede hacer con 10, 20, 30, 40, 50 leds power high d 1w y mas tambien. Gracias

[@Stefano91ste]

Hola! Gracias :) - Si haces dos de estos tableros, puedes usarlo en modo estéreo. - para los LED de alto brillo (1W) se deben hacer algunas modificaciones al circuito porque los LM39XX no pueden emitir tanta corriente. - Ya he creado Vu-Mete con 10, 20 y 40 LED.. y haré otros con 30, 50 LED y tal vez incluso 80 y 100 LED. Lo siento por mi español :)

[@inhleminh3225]

Although this circuit looks good, but I think that with A1015 transistor, 1 Lm3915 ic can control up to 100 leds so I think 40 leds only need 1 Lm3915 ic :D

[@Stefano91ste]

True, but so you should connect the LEDs in parallel?

[@inhleminh3225]

@@Stefano91ste yes 👍

[@andreabetti9018]

Stefano, io avrei trovato dove si compra il filtro a 31 bande, costa comprese le spedizioni 75$, avrei intenzione di prenderlo, ma se lo costruisci te, sarebbe meglio.

[@Stefano91ste]

Lo so, il problema è che ad ora devo progettarlo da zero e ci vuole tempo😅 Poi comunque usare un modulo già pronto non era nei miei piani

[@jasonlee3247]

Nice looking project. The LED colours aren’t correct in my opinion, there needs to a few less green, and a few extra yellow LEDs.

[@Stefano91ste]

Thanks! - No problem, you can put the LEDs as you want, even all of the same color;)

[@johnbravo7542]

was thinking the exact same thing

[@istvanorosz7178]

Hello It works with 12V?

[@Stefano91ste]

Yes works, but for long use I recommend power at 9V

[@istvanorosz7178]

@@Stefano91ste Thank you

[@DevendraSingh-ni4sd]

Very nice

[@barot67]

Salve, posso chiederti che tipo di pulsante usi? e possibile non usarlo e fare un ponticello?..grazie e saluti

[@Stefano91ste]

Salve, certo è un semplice pulsantino che non mantiene lo stato di ON, puoi tranquillamente saldarci due pin con ponticello

[@aniyankuttanyga5417]

Please send to me a 40led VU mtr PC Band full components

[@Stefano91ste]

Hi, you can find diagram, pcb and components in the video and in description.

[@gerardoaurilio3457]

bellissimo stefano ho già ordinato i PCB

[@Stefano91ste]

Grazie mille e Grande!!! :D

[@barot67]

Buongiorno Stefano, scusa ti chiedo di nuovo, da inesperto cosa usi come input del segnale. Ho provato con max 4466 e un modulo con microfono ma non funzionano, nel senso che non gli arriva il segnale o e debole. Ho provato con TRRS è non va...c'è da amplificare il segnale? va bene il LM386? Ho provato il test e i led si accendono..il tutto fatto solo come uso personale per imparare grazie

[@Stefano91ste]

Buongiorno a te Francesco, io uso segnale amplificato, quindi proveniente dalle uscite dell’amplificatore. In altri vu meter ho integrato un pre-amplificatore con LM386 (in questo video lo schema: kzbin.info/www/bejne/n57IdnpvgsSEetE ) spero possa esserti d’aiuto. PS: ho avuto tempo solo oggi di leggere gli ultimi commenti :)

[@barot67]

@@Stefano91ste grazie mille

[@jordonqian8669]

Hello! Why is there only one hole in your lm3915 40 LED download DRL drilling file?

[@Stefano91ste]

Hi, the Drilling.drl file is ok, I just checked it now.. what's the problem?

[@Stefano91ste]

Load them on jlcpcb and use the gerber viewer, you'll see that everything is ok

[@moxysoft]

Help! I ordered several and when assembled they all exhibit the same thing - the bottom LEDs about 5 are solid on.. changed to 100 ohm and 2 stay on. Can you assist me? ( Even when no sound source is attached )

[@Stefano91ste]

This is strange, with various tests I did on the vu meters, I found this problem in two cases: 1) the audio source has a signal with noise (But if replacing the resistor as I wrote in the description, everything works fine) 2) disturbances are present in the power supply. Have you tried to power the circuit with a 9V battery?

[@manalvartak8645]

How are you giving the music input?

[@Stefano91ste]

Hi, from the amplifier output or from a pre-amplifier

[@OGBOOTSY]

I'm knew to pcb boards how do I order a board just like the one you used in the video...?

[@Stefano91ste]

Hi, You can Buy from jlcpcb.com 1) Download the project files (link in video description) or here: bit.ly/2Z1Uj84 2) Register on jlcpcb.com/ if you don't already have an account 3) Follow the procedure in this video starting from 1:33 NB: You can choose the color you want for the board.

[@OGBOOTSY]

@@Stefano91ste thank you soooooo much :)

[@andreabetti9018]

Ciao Stefano, vorrei ordinare questi circuiti ma non riesco, mi potresti aiutare? GRAZIE.

[@Stefano91ste]

Ciao Andrea, è molto semplice ordinare questi PCB: 1) scarica i file del pcb, di questo video, da questo link: bit.ly/2Z1Uj84 (lo trovi anche in descrizione video). 2) dovresti registrarti su jlcpcb.com una volta creato il tuo account devi fare l'ordine dei PCB. 3) Per fare l'ordine vai su jlcpcb.com poi premi sul pulsante azzurro "QUOTE NOW" e poi sul pulsante blu "Add your gerber now" e carica il file che ti ho fatto scaricare prima. 4) Scegli colore del pcb che preferisci e completa l'ordine. Puoi seguire tutta la procedura per ordinare i PCB nel video da 1:20 Spero di averti aiutato!

[@edgardaraujorj]

Hi... how to adjust the sensitivity???

[@Stefano91ste]

Hi, this vu-meter is not adjustable. If necessary you can add a resistor (or a timmer) on the + of the input signal

[@Account-c7i]

The best!

[@thayongnoi2661]

give me the link to download the printed circuit

[@Stefano91ste]

Hi, you can find it in the description of this video

[@uemersonmoreira5082]

não consegui pedir este circuito pela jlcpcd.com tem algo no endereço que precisa ser colocado, entrei em contato nao souberam explicar. tipo codigo de contrinuição so faltou isto

[@Stefano91ste]

Hi, I don't understand what the problem is. Just upload the .rar file that I shared in video description to JLCPCB.

[@CathySiegert]

Beatiful, but it is a double sided board, so for me its useless. I prefer single sided boards, because when one part is defective - like the ICs - so it is difficult to desolder the pins without cracking the solderjoints.

[@DynamicSeq]

Get a heat gun...

[@osetiadarma8805]

Can you make with IC KA2281. 😀😀😀

[@Stefano91ste]

Hi! at the moment I don't have that IC available, but I'd like to make some projects with it!

[@osetiadarma8805]

@@Stefano91ste Ok No problem :-)

[@johnbravo7542]

Electronics Projects-Stefano91ste do you sell the boards by any chance?,just the boards

[@Stefano91ste]

Hi, You can download gerber files in video description and order the boards on JLCPCB

[@johnbravo7542]

@@Stefano91ste Thank you

[@malthusgalvao3825]

Muito bom. Obrigado. Very good. Thanks.

[@Stefano91ste]

Hola:) Thanks for appreciating my work

[@mekateknik3717]

you should put links for the capacitors, you don't give a lot of information. I ordered everything necessary for this project and again I can't find the capacitors to use and because of that I spent my money for nothing :(

[@Stefano91ste]

Hi, they are simple electrolytic capacitors, in the video description you find all their characteristics, and in the video you can see how they are aesthetically made. I don't understand what the problem is.. for any clarification you can ask me.

[@mekateknik3717]

@@Stefano91ste ((I was speaking for the video of the vu-meter with 20 leds with blue leds)) I searched all the sites, I can't find. The one in the video has a black and gold color and does not look like the other capacitors... It would not be audio capacitors ?? If you can give me a link to order I would be happy because I have been looking for 1 week. :(. Can these capacitors be suitable? www.ebay.fr/itm/20pcs-ELNA-AUDIO-Series-1uF-25V-1uf-Audio-Electrolytic-Capacitor-5X11mm-/113731918637

[@Stefano91ste]

Those in your link are fine, alternatively I purchased these last year and they are the ones I use in many of my projects: www.aliexpress.com/item/32816930311.html?spm=a2g0s.9042311.0.0.27424c4dnvO28h However for these vu meters I use normal electrolytic capacitors

[@EdEditz]

Can you also use the LM3914 for this?

[@Stefano91ste]

Yes, you can use LM3914, LM3915 and LM3916 .. however the measurement range will change

[@EdEditz]

@@Stefano91ste Ah okay. Thank you!

[@pramodrajrajappan9887]

can you make a peak hold vu meter.....???

[@Stefano91ste]

is among the things I would like to do in the future:)

[@parthtank7605]

Sir please test all vumeters you have made in older videos in one together

[@Stefano91ste]

I add it to the to-do list :)

[@andreabetti9018]

ho capito, senti, ma x contattarti direttamente come faccio? Ti devo chiedere alcune cose riguardo ai circuiti.

[@Stefano91ste]

Ciao, puoi chiedermi tutto quello che vuoi nei commenti sotto i video

[@loicmentha4224]

Hi stefano, How could I turn this into a dot meter ? Thanks in advance

[@Stefano91ste]

Hi, I explained to you in the other comment!

[@anhnguyen887]

Mạch này về tới việt nam là bao nhiêu tiền nếu mua 5 cái ...tính bằng tiền gì v shop

[@Stefano91ste]

english please

[@boostedaudios4879]

And you need another cabinet for fitting this 😂 but good design

[@joemay20]

WHERE THE KIT AVAILABLE? how much is the cost?

[@Stefano91ste]

Hi, it's not a KIT but my DIY project.. in the video description you can find the gerber files of the PCB, and you can buy the boards on JLCPCB

[@tizok77]

Where can I buy the kit.?

[@Stefano91ste]

Hi, it's not a KIT but a PCB designed by me. In the video description I put the files for the PCB, you can order the boards on sites like jlcpcb

[@donovanewart3399]

WHAT THE COST FOR THE COMPLETE BOARD?

[@Stefano91ste]

2$ for 5 Board + shipping cost + the components (that depends on where you find them)

[@donovanewart3399]

@@Stefano91ste thanks

[@donovanewart3399]

@@Stefano91ste how can I order 10 LM3915VU-Meter 40 led Board please send me a link

[@mekateknik3717]

hi, the schema to 0:30 is ok for 40 led ?

[@Stefano91ste]

Hi, Yes.. it is the scheme of this project

[@moxysoft]

Can you give a source for the test button? Thank you

[@Stefano91ste]

Hi, The test button is directly connected to VCC

[@hecirlenevieira6622]

Top de mais 😍😍😍😍

[@videoscverde]

The cascade connection between ICs does not increase the maximum scale for VU, but increases precision only. Not useful. Sorry.

[@Stefano91ste]

Hi, You are wrong.. the LM3915 connected in cascade increase their range in dB up to a maximum of 90 dB. it is written on the first page of the datasheet. Please read it! FROM DATASHEET: "Multiple devices can be cascaded for a dot or bar mode display with a range of 60 or 90 dB. LM3915s can also be cascaded with LM3914s for a linear/log display or with LM3916s for an extended-range VU meter" LINK: pdf1.alldatasheet.com/datasheet-pdf/view/8899/NSC/LM3915.html

[@thrideesanratheeshkumar7128]

How to purchase in this items?

[@Stefano91ste]

Hi, You can buy the PCB board on JLCPCB by uploading my gerber files (link in video description)

[@andreabetti9018]

si, grazie, x il cell. si ho contattato il tipo sull'email ma costa 75$ finito, volevo vedere se si riusciva ad avere solo il circuito

[@soundstudiotony2231]

I want to buy this

[@Stefano91ste]

Hi, You can Buy from jlcpcb.com 1) Download the project files (link in video description) or here: bit.ly/2Z1Uj84 2) Register on jlcpcb.com/ if you don't already have an account 3) Follow the procedure in this video starting from 1:33 NB: You can choose the color you want for the board.

[@vishakhramachandran7223]

How much ampere in this circuit...? Pls replay

[@Stefano91ste]

Maximum 0.80A

[@videoscverde]

Nao gostei. Achei estreita a faixa dinamica. Os ultimos leds acendem quase simultaneamente aos primeiros.

[@mesiakbarov5023]

Hi I made this board and want to use it in the car؟؟؟

[@Stefano91ste]

Hi, You can, but power it at 9 or 12V dc

[@leddanushka1828]

Can we make tihs as wireless

[@bassmekanikproboosterz7791]

Se puede hacer en modo PUNTO este vumetro?

[@Stefano91ste]

Necesitamos hacer algunos cambios, pero todavía no he logrado que funcione bien in modo punto.

[@andreabetti9018]

altra cosa Stefano, ma questo vu meter non ha la funzione (DOT)?

[@Stefano91ste]

No, su questo non l’ho messa perchè mi dava un problema sul quarto LM3915

[@Kostanj42]

amaizing!

[@Stefano91ste]

Thanks:)

[@PalmiAudioLab]

OTTIMO LAVORO BELLO.... DIAGRAM MANCA COLLEGAMENTO BUTTON TEST PUOI FARE VEDERE GRAZIE

[@CHANDANKUMAR-em4rh]

Sir for 50 led to work of 5 ic At this diegram ?

[@Stefano91ste]

It can work, just add an LM3915

[@CHANDANKUMAR-em4rh]

Thanks so mutch

[@JoaquimAparecidoDaSilva-sq3wp]

Tank you I am live in colombo Brasil

[@greensocket3583]

love it:)

[@Stefano91ste]

Thank you :)

[@wiznumurti3397]

Does it work with 5V input?

[@Stefano91ste]

Yes, you can power it with 5V but the LEDs light up little

[@sarjukumar8804]

Power Bank PCB board Kaise banaen batao

[@Stefano91ste]

Maybe I'll make a video soon

[@dj_sorra3605]

I want to buy, from where?

[@Stefano91ste]

Hi, You can Buy from jlcpcb.com 1) Download the project files (link in video description) or here: bit.ly/2Z1Uj84 2) Register on jlcpcb.com/ if you don't already have an account 3) Follow the procedure in this video starting from 1:33 NB: You can choose the color you want for the board.

[@sushilkumardubey6255]

Ye board 2 peace chahiye

[@carbilicon]

I like it. Make one for me.

[@Stefano91ste]

Hi, thanks! i have shared the PCB file in video description