@@Stefano91ste Ahh ecco, si lo so che bisogna inserire dei filtri passa basso alto ecc per avere la visualizzazione di ogni frequenza. Era per dire visto che hai tutte quelle PCB d'avanzo è forse l'unico modo salvo altri impieghi come voltmetro a led e affini, per sfruttarle tutte. Poi non capisco perché hai messo i ponticelli che sono un lavoro extra, non facevi prima a fare il pcb doppio strato ? PS: il IC 3916 è meglio del 3915 perché è specificatamente studiato per applicazioni vu-meter ed è compatibile con lo schema che hai utilizzato quindi non serve modificare nulla di componentistica.
@@lilluminatoalternativo3926 I ponticelli mi piacevano esteticamente😁. Il 3916 preferisco usarlo per applicazioni a 10 LED avendo una scala dB ben definita. Il 3915 è anch’esso studiato per applicazioni audio e tra i LED c’è un intervallo di 3 dB se non ricordo male. Lo preferisco per applicazioni dove devo collegare gli IC in serie/ cascata. Qui realizzai un Vu-Meter con LM3916 (doppio canale con 10 LED ciascuno e scala dB stampata su PCB): ruclips.net/video/l8oUQpGAOCw/видео.htmlsi=0LRc2Q_AXbRO1FLv Qui invece un video dove metto a confronto gli LM3914/ 15 e 16. Tutti con lo stesso circuito ed input: ruclips.net/video/7avb905F-MQ/видео.htmlsi=5hh-4HkM1tGto1b0 Versione su breadboard: ruclips.net/video/5tI8b_KqdrM/видео.htmlsi=pDwHd80tnnnpcU-G
@@Stefano91ste Mi potresti dare un mano che sono un tantino "nabbo" di elettronica nel senso che non sono in grado di calcolare i componenti. Vorrei fare questo vu-meter ma con 12 led per canale uscita a bandiera, posso chiederti un consiglio/aiuto ? Non so se basta collegarli in serie o parallelo o serve un trasistore per amplificare la corrente, perché se non ho letto male dal datasheet dei lm39xx reggono massimo 30 mA e non credo che possa reggere la corrente di 120 led ciascuno IC. Io ho anche pinerest eventualmente potresti passarmi uno schemino da la, se vuoi 🙂
Hey Stef do you sell those boards you design? I have never gone to the pcb folks to get a board before and with my scrambled egg brains I am sure it would just frustrate me.. anyway another cool thing to play with.. thanks my brother!!
1st of all thank you so much for giving us every time such a good, new, very very wonderful projects......❤️❤️❤️ Sir, I cordially request to you please make a *POLICE BLINKING LIGHT* circuit & each of the channel can carry 500 leds....... Sir please........🙏🏼
If I want to replace the LED using a PNP transistor, What do I need to change? Does the base require 20 resistors, and I wonder why in your circuit Are there not 20 resistors in that led? Where's the resistor?
Very good project. I will give it a try, but I didnt understand some things: 1. Why do we need the 1K resistors parallel to led 9 (on IC1 pin 11) and led 11 (on IC2 pin 1)? 2. Why pin 4 of the second IC and pin6 of the 1st IC are connected with a voltage divider and not like the way as pins 6&7 on the 2nd IC? 3. The signal input is an aux output or a speaker output? 4. What are the db where the leds refer to?
Hi, thank you!! I will answer your questions! 1) Without those resistors the LED number 10 will not turn off in DOT mode. 2) The connections are different to allow the expansion of the LED display range. If you looked at the schematic of my vu-meter with 40 LEDs you would notice that the first three LM3915s are all connected in the same way and the fourth LM3915 is connected like the second of this project. 3) You can connect a pre-amplified output to the signal input or the amplified output of the amplifier, by connecting the vumeter in parallel to one of the speakers. 4) Each LED represents 3 dB
Hello, I am a beginner and I like this work very much. So just follow the video and the PCB diagram you uploaded, and make one yourself. Now everything has been welded, and everything is normal when the power is turned on. The first and second lights are on. When the speaker is connected, the lights are all on, and there is no beating with the music. When the BAR Mode is unplugged, the left and right lights 1 and 20 are on, and they do not dance with the music. Did I make a mistake in that aspect? Looking forward to your reply and heartfelt thank you.
Hi, thank you! If the first two LEDs remain lit only with the power supply, replace the 100K resistor with a 33K one and the "problem" is solved. "When the speaker is connected, the lights are all on, and there is no beating with the music" If all the LEDs remain on with the speakers connected I think it is due to the amplifier. what amplifier did you connect the vu-meter to? "When the BAR Mode is unplugged, the left and right lights 1 and 20 are on, and they do not dance with the music." This problem is solved by solving the first problem of the LEDs that are all on
@@Stefano91ste Thank you for selfless sharing, I am also very interested in your electronic light. I would also like to ask you a question. Now this lamp will only move when the volume is adjusted to a certain level. Can it be changed to a low volume and the light can move?
Hi Stefano, I can't find conectors that you use usually for VCC, GND and Signal, could you please tell me the name or any place to buy it ???? Thanks in advance.
Hi, I was able to buy them only here unfortunately: 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
@@Stefano91ste I tried to buy here locally. If not is possible to find, seems that I can buy it from this page, surprisingly the page have traduction in spanish.
Hi, It would be better to use an LM3915 for audio applications, LM3914 works but has a different, less accurate, signal reading. OK for the resistors, the values can vary even if slightly.
IL "metal wire" ad occhio sembra ottone... Ma l'ottone non si lascia saldare. Potresi spiegarci di cosa si tratti? Grazie :-D Per il resto, io ADORO il LED; quindi, che te lo dico a fare? ;-)
Grazie mille =) è filo di rame dorato, si trova di vari colori per lo più per decorazioni, conduce benissimo e quindi diventa perfetto per i miei PCB. Esempio: www.negoziopesca.it/it/filato-di-rame-medium.html?UA-51297256-24&gclid=Cj0KCQiAifz-BRDjARIsAEElyGJVFhBvTnIERSFIjsYdiYxjk0JdXlk3q0-pZLfRtxfZOau-ViSn_csaAp6MEALw_wcB il mio è circa 0.8mm di diametro
Hi, You can download the PCB file and order the boards on jlcpcb as I show in the video. Hola, Puede descargar el archivo de PCB y pedir las placas en jlcpcb como muestro en el video.
On your components listed above you show a quantity of four 2.7KΩ Resistors wouldn't be five ? Just wanted to make sure. love your videos. thanks for taking the time to produce them.
I'm building this and I'm confused about the fifth 2.7k resistor, I can't find it :/ I can only see 4 in the diagram. Sorry if it's a dumb question. Also, I can only see 2 1k resistors instead of 3.
@@rafaelnieves8443 Rafael, If you look at Stefano VU Meter Board there are Five 2.7K resistors. 3 of them are directly below the LM3915 Chip on the right and the two remaining 2.7K resistors are directly below the LM3915 chip on the left. Red-Violet-Red-Gold 5% +/- equals 2.7K resistance. You are right as for the schematic. you may be able to build it that way, but there are five 2.7 Ohm resistors on the board.
Oh so they're missing from the schematic, I'm not crazy 😅 I didn't see his actual board since I'm doing ir on a breadboard and it's a bit different. So I see one between port 7 and ground (right IC), and then one connected to port 7 and ground (left IC), another one port 6 (left), port 4 (right) and ground. Lastly, one between port 4 and 8 (left IC) Which one is missing? I referenced the schematic at 0:50 to build the circuit btw. Lastly, there are TWO 1k resistors right? Not three as in the list
@@rafaelnieves8443 The third 1K resistor is the one protecting the Power LED - LED which is not shown in the diagram as it is not a vital part of the circuit. it is a led connected between vcc and gnd.
HELP PLEASE ⚠️...⚠️. I made this pcb , problem is led 1 and led 16 voltage is equal to input voltage (i am using 12v). so led damaged. another issue is , LED2 and LED 3 always ON (LED 1's voltage level always high) . except this ,VU meter working normally . what is the value of resistor you placed near jumper , as per schematic value is 10 Ohm , but your pcb looks different .. help me to fix... t
Hi, the resistor next to the jumper must be placed with a value between 10 ohm and 50 ohm, but it does not affect the operation of the circuit. To solve the problem of the first 2 or 3 LEDs always on use a 33K resistor instead of the 100K one (if this does not work, the problem could be due to a disturbance in the supply current or the amplifier outputs too high). Regarding the problem "led 1 and led 16 voltage is equal to input voltage" it can be caused by a faulty LM3915 or by some short circuit between the welds. Next, take out the LM3915 and check for shorts between the solders. Then test the correct functioning of the two LM3915s on a breadboard or replace them with two new ones.
Just ordered new LM3915 ICs, waiting for that. same time I am doing some experiments. I used resistors for LED1 and LED16 voltage dropped and working normally .As you said i replaced 100K resistor with 33K so LED2 and LED3 always on issue solved . but LED 1 always on.. but its ok.. I have noticed one thing , while playing music , in DOT MODE LED1 and LED11 not turning off completely . anyway I will continue..................... 😎️
Very nicely designed circuit board for VU meter, I like it.
Thank you😁
With all these board you can make a HI-FI audio visual equalizer, but are you italian ?
Hi, It could be done, but you need to add a filter for each Vu-Meter for the frequency you want to display. Si sono italiano =)
@@Stefano91ste Ahh ecco, si lo so che bisogna inserire dei filtri passa basso alto ecc per avere la visualizzazione di ogni frequenza.
Era per dire visto che hai tutte quelle PCB d'avanzo è forse l'unico modo salvo altri impieghi come voltmetro a led e affini, per sfruttarle tutte.
Poi non capisco perché hai messo i ponticelli che sono un lavoro extra, non facevi prima a fare il pcb doppio strato ?
PS: il IC 3916 è meglio del 3915 perché è specificatamente studiato per applicazioni vu-meter ed è compatibile con lo schema che hai utilizzato quindi non serve modificare nulla di componentistica.
@@lilluminatoalternativo3926 I ponticelli mi piacevano esteticamente😁. Il 3916 preferisco usarlo per applicazioni a 10 LED avendo una scala dB ben definita. Il 3915 è anch’esso studiato per applicazioni audio e tra i LED c’è un intervallo di 3 dB se non ricordo male. Lo preferisco per applicazioni dove devo collegare gli IC in serie/ cascata.
Qui realizzai un Vu-Meter con LM3916 (doppio canale con 10 LED ciascuno e scala dB stampata su PCB): ruclips.net/video/l8oUQpGAOCw/видео.htmlsi=0LRc2Q_AXbRO1FLv
Qui invece un video dove metto a confronto gli LM3914/ 15 e 16. Tutti con lo stesso circuito ed input: ruclips.net/video/7avb905F-MQ/видео.htmlsi=5hh-4HkM1tGto1b0
Versione su breadboard: ruclips.net/video/5tI8b_KqdrM/видео.htmlsi=pDwHd80tnnnpcU-G
@@Stefano91ste Mi potresti dare un mano che sono un tantino "nabbo" di elettronica nel senso che non sono in grado di calcolare i componenti.
Vorrei fare questo vu-meter ma con 12 led per canale uscita a bandiera, posso chiederti un consiglio/aiuto ?
Non so se basta collegarli in serie o parallelo o serve un trasistore per amplificare la corrente, perché se non ho letto male dal datasheet dei lm39xx reggono massimo 30 mA e non credo che possa reggere la corrente di 120 led ciascuno IC.
Io ho anche pinerest eventualmente potresti passarmi uno schemino da la, se vuoi 🙂
Did you take the signal line from the input or output of the amplifier?
Hi, from the output
@Stefano91ste If I want to send a signal from the input, what should I do? Please let me know.
Hey Stef do you sell those boards you design? I have never gone to the pcb folks to get a board before and with my scrambled egg brains I am sure it would just frustrate me.. anyway another cool thing to play with.. thanks my brother!!
Hi, thank you very much! I can't sell them because there are a few samples that send me for free for the channel
@@Stefano91ste no prob.. thanks anyway..
hello, please were can i buy?
Sar yah prodekt Kahan Milega
Pcb files are in video description
1st of all thank you so much for giving us every time such a good, new, very very wonderful projects......❤️❤️❤️
Sir, I cordially request to you please make a *POLICE BLINKING LIGHT* circuit & each of the channel can carry 500 leds.......
Sir please........🙏🏼
Thank you so much for appreciating my work!
@@Stefano91ste Most Welcome Sir...
I cordially appreciate your every project & you ofcourse deserve it.......❤️❤️❤️
Great work... please try PEAK HOLD methods.. using LM3915/16/14 with CD4066..
Thanks for the advice, I'll try :)
@@Stefano91ste .VU with peak hold is so cool. please make one. This is not a big deal for you , You are the "VU MAN" ⭐⭐⭐⭐⭐
I'll do it on breadboard soon ;)
@@Stefano91ste Waiting ........ :)
If I want to replace the LED using a PNP transistor, What do I need to change? Does the base require 20 resistors, and I wonder why in your circuit Are there not 20 resistors in that led? Where's the resistor?
Very good project. I will give it a try, but I didnt understand some things:
1. Why do we need the 1K resistors parallel to led 9 (on IC1 pin 11) and led 11 (on IC2 pin 1)?
2. Why pin 4 of the second IC and pin6 of the 1st IC are connected with a voltage divider and not like the way as pins 6&7 on the 2nd IC?
3. The signal input is an aux output or a speaker output?
4. What are the db where the leds refer to?
Hi, thank you!! I will answer your questions!
1) Without those resistors the LED number 10 will not turn off in DOT mode.
2) The connections are different to allow the expansion of the LED display range. If you looked at the schematic of my vu-meter with 40 LEDs you would notice that the first three LM3915s are all connected in the same way and the fourth LM3915 is connected like the second of this project.
3) You can connect a pre-amplified output to the signal input or the amplified output of the amplifier, by connecting the vumeter in parallel to one of the speakers.
4) Each LED represents 3 dB
Good project, thanks for sharing!
Thank you =)
Thank you for this and all other projects...
Can I use this circuit in my video.?
Hi, thank you!
Yes of course, you can use my circuits for your videos, but not if they are sponsored videos.
@@Stefano91ste Thank you...👍
Bro, why you use too many jumpers on PCB, that's double sided PCB right?
Hi, because I didn't want to make a 4 layer PCB or even enlarge this
@@Stefano91ste OMG, actually you can design the 2 layers PCB for that circuit without any jumpers.
Can you share the schematic? Thanks
Hi, you can see it in the video at 0:37
hi, thanks, great project, i want to build one for 400v dc, is for a capacitor that is discharging, in a fence
Hello, I am a beginner and I like this work very much. So just follow the video and the PCB diagram you uploaded, and make one yourself. Now everything has been welded, and everything is normal when the power is turned on. The first and second lights are on. When the speaker is connected, the lights are all on, and there is no beating with the music. When the BAR Mode is unplugged, the left and right lights 1 and 20 are on, and they do not dance with the music. Did I make a mistake in that aspect? Looking forward to your reply and heartfelt thank you.
Hi, thank you!
If the first two LEDs remain lit only with the power supply, replace the 100K resistor with a 33K one and the "problem" is solved.
"When the speaker is connected, the lights are all on, and there is no beating with the music"
If all the LEDs remain on with the speakers connected I think it is due to the amplifier. what amplifier did you connect the vu-meter to?
"When the BAR Mode is unplugged, the left and right lights 1 and 20 are on, and they do not dance with the music."
This problem is solved by solving the first problem of the LEDs that are all on
@@Stefano91ste It was a success, thank you for your teaching. Like this work very much
I am happy with this, have fun with electronics!
@@Stefano91ste Thank you for selfless sharing, I am also very interested in your electronic light. I would also like to ask you a question. Now this lamp will only move when the volume is adjusted to a certain level. Can it be changed to a low volume and the light can move?
Would the same setup apply Lm3914 in dot mode?
I want to use it as a battery level indicator
Hi, yes is possible to use this circuit as a battery indicator with LM3914
Using same size components like yours, what necessary information do I need to order from this place? I’m not great with a computer. 😬
Hi, I use standard components, no SMD, the resistors are 1/4 watt
Super
Thank you =)
Help meee, my led just light up 10, where did i go wrong? Thank youu
Where can i buy the PCB Board?
Hi, from JLCPCB ( jlcpcb.com )
Sar aap kon se aapp (software) se pcb dijain karate hai
i use Sprint Layout 6
Hi Stefano, I can't find conectors that you use usually for VCC, GND and Signal, could you please tell me the name or any place to buy it ???? Thanks in advance.
Hi, I was able to buy them only here unfortunately: 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
@@Stefano91ste I tried to buy here locally. If not is possible to find, seems that I can buy it from this page, surprisingly the page have traduction in spanish.
Can I use it for rpm on motorcycle?
Yes, but with this diagram and LM3914 prefer: ruclips.net/video/Kowv-nJnX7o/видео.htmlsi=jgt_C9HD94784AmU
@@Stefano91ste thanks ❤️
How you connect it with your speaker box?
Please tell🙏
You can connect it in parallel to one of the speakers, or to the output of a pre-amplifier
I want to buy 4 of that 20 led vu meter in the video for my personal use but l want the lm 3916 ic. Please reply me. Thank you.
Hi, sorry for the late reply. Yes you can use LM3916
Which signal from input or speaker?
Speaker
Stephano, would this circuit respond to an analog signal input from a linear Hall Effect sensor (like the KY 024)?
I have never tried, this circuit receives a voltage as input
Wonderful, Can I use lm3914 instead of lm3915 and a resistor value of around 2- 3.5 k ohms value for 2.7k resistor ?
Hi, It would be better to use an LM3915 for audio applications, LM3914 works but has a different, less accurate, signal reading. OK for the resistors, the values can vary even if slightly.
@@Stefano91ste ok thanks
@@Stefano91ste you
IL "metal wire" ad occhio sembra ottone... Ma l'ottone non si lascia saldare. Potresi spiegarci di cosa si tratti? Grazie :-D
Per il resto, io ADORO il LED; quindi, che te lo dico a fare? ;-)
Grazie mille =)
è filo di rame dorato, si trova di vari colori per lo più per decorazioni, conduce benissimo e quindi diventa perfetto per i miei PCB. Esempio: www.negoziopesca.it/it/filato-di-rame-medium.html?UA-51297256-24&gclid=Cj0KCQiAifz-BRDjARIsAEElyGJVFhBvTnIERSFIjsYdiYxjk0JdXlk3q0-pZLfRtxfZOau-ViSn_csaAp6MEALw_wcB il mio è circa 0.8mm di diametro
Dimensões da placa?
Hi, 42x141 mm
Onde comprar este produto, moro no brasil
Hi, You can download the PCB file and order the boards on jlcpcb as I show in the video.
Hola, Puede descargar el archivo de PCB y pedir las placas en jlcpcb como muestro en el video.
Board dimensions?
Hi, 141 mm* 42 mm
On your components listed above you show a quantity of four 2.7KΩ Resistors wouldn't be five ? Just wanted to make sure. love your videos. thanks for taking the time to produce them.
You are right, now I have corrected! - my fault, I made the parts list by going from memory.. thanks
I'm building this and I'm confused about the fifth 2.7k resistor, I can't find it :/ I can only see 4 in the diagram. Sorry if it's a dumb question. Also, I can only see 2 1k resistors instead of 3.
@@rafaelnieves8443 Rafael, If you look at Stefano VU Meter Board there are Five 2.7K resistors. 3 of them are directly below the LM3915 Chip on the right and the two remaining 2.7K resistors are directly below the LM3915 chip on the left. Red-Violet-Red-Gold 5% +/- equals 2.7K resistance. You are right as for the schematic. you may be able to build it that way, but there are five 2.7 Ohm resistors on the board.
Oh so they're missing from the schematic, I'm not crazy 😅 I didn't see his actual board since I'm doing ir on a breadboard and it's a bit different. So I see one between port 7 and ground (right IC), and then one connected to port 7 and ground (left IC), another one port 6 (left), port 4 (right) and ground. Lastly, one between port 4 and 8 (left IC) Which one is missing? I referenced the schematic at 0:50 to build the circuit btw.
Lastly, there are TWO 1k resistors right? Not three as in the list
@@rafaelnieves8443 The third 1K resistor is the one protecting the Power LED - LED which is not shown in the diagram as it is not a vital part of the circuit. it is a led connected between vcc and gnd.
HELP PLEASE ⚠️...⚠️.
I made this pcb , problem is led 1 and led 16 voltage is equal to input voltage (i am using 12v). so led damaged. another issue is , LED2 and LED 3 always ON (LED 1's voltage level always high) . except this ,VU meter working normally . what is the value of resistor you placed near jumper , as per schematic value is 10 Ohm , but your pcb looks different .. help me to fix... t
Hi, the resistor next to the jumper must be placed with a value between 10 ohm and 50 ohm, but it does not affect the operation of the circuit. To solve the problem of the first 2 or 3 LEDs always on use a 33K resistor instead of the 100K one (if this does not work, the problem could be due to a disturbance in the supply current or the amplifier outputs too high). Regarding the problem "led 1 and led 16 voltage is equal to input voltage" it can be caused by a faulty LM3915 or by some short circuit between the welds.
Next, take out the LM3915 and check for shorts between the solders.
Then test the correct functioning of the two LM3915s on a breadboard or replace them with two new ones.
@@Stefano91ste thank you for your support. i will try..🙂️👍️
keep me updated
Just ordered new LM3915 ICs, waiting for that. same time I am doing some experiments. I used resistors for LED1 and LED16 voltage dropped and working normally .As you said i replaced 100K resistor with 33K so LED2 and LED3 always on issue solved . but LED 1 always on.. but its ok.. I have noticed one thing , while playing music , in DOT MODE LED1 and LED11 not turning off completely . anyway I will continue..................... 😎️
Very nice
Thank you!
💐💐💐💐💐
Nice
Thanks
Upload pcb layout in pdf
I no share PCBs in pdf format because they are easily editable
Nice!
Thank you :)
Good
Thank you!:)
Nice PDF Sir please
Hi, I no share PCBs in pdf format because they are easily editable
Excelent wwwwwoooooooo súper