Single IC stereo LED VU Meter LM3914 or LM3915 or LM3916

[@MikeS-rp8cv]

This is GENIUS! While I have been tinkering and building in electronics since I was 15 in 1979, I never thought of using a transformer a a switch! I have ALWAYS wanted to make a dual channel VU meter with a single LM391x, but didn't know how to switch between the channels. But after seeing this it made me think - to make this battery powered, would a couple 9V batteries in parallel for current with a decent speed switching transistor work? Thanks for an awesome project!

[@moristo]

You need two positive poles that work to provide current alternately 50-60 times per second to make a differential between Lch and Rch.

[@moristo]

If you already know the basics of how it works, then you should know what to do to be able to use 9vDC.

[@MikeS-rp8cv]

@@moristo Thanks for the reply! I was messing around with this last night. Was going to try using the 74112 flip-flop chip or a "hand made" flip flop with transistors and stuff... Still this is really an awesome project and It's kind of funny how some of the other posters say it's a trick or something. While I am not a genius, like you, it was still pretty easy to see that it is NOT s trick - it is AWESOME! It's too bad they discontinued some of those 391x chips...

[@moristo]

You're welcome Sir. From what you said, I can tell that you are genius. All viewers have the right to express their own opinions, whether it is because they really don't know, or because of what motivation they express it.

[@moristo]

Oh, I forgot, besides you need two positive poles that function to provide current alternately 50-60 times per second, you also need two gates that alternately open and close 50-60 times per second that synchronously with the two positive poles, that two gates will work for the audio sensor input section that alternately to enter R and L audio signal voltage level.

[@paglababa9639]

i watch many channel for vu meter but your circuit is awosam and i think you are a jim for it’s keep it up thanks brother ❤❤❤❤

[@moristo]

what "awosam and a jim" mean is? YAW bro!

[@paglababa9639]

@@moristo you are a very well known parsons for vu meter circuit and you have very good knowledge for electronic

[@moristo]

Bro, till today and then, I still always learn from what I do every day.

[@protesisroboticamexicana5296]

Hello my friend, i hope that you don't sense offended by my comments, a half a year i did see one of your videos about luminiscent indicators, and use one of these for my proyect, this did work very good, since this date, i am your fan, whith respect, Protesis Robotica Mexicana(my english it's no so good, sorry) greeting's , you rules!!!

[@moristo]

Thank you so much friend, I'm always very grateful to those who want to support my channel despite many shortcomings.

[@electronic7979]

Very nice electronic circuit.

[@moristo]

You are the best, thank you friend.

[@mommyaek5985]

Tío Maristo siempre ha tenido éxito.

[@moristo]

sama-sama sukses/berhasil, gracias.

[@myukimages1]

AC 50Hz supply. first +ve half on left terminal and second +ve half on right terminal. Based on that, this circuit works left speaker 25 cycle per second and right speaker 25 cycle per second. Single circuit but dual power input, dual audio input, and dual LED output. Wow this is grate....

[@moristo]

AC 50 Hz electric sources, so the left 50 cycles/second and right 50 cycles/second, they just 180 degrees different.

[@myukimages1]

@@moristo yes my mistake, First half 180 degree Left ... second 180 degree Right. Thanks....

[@moristo]

But I know my friend, you have found the secret.

[@noynaelectronics.9273]

Thank you for this circut

[@moristo]

@GOUTAM DAS you are welcome, thanks for watching.

[@TechWood-24]

Very useful information brother. Thank you so much.

[@moristo]

You are welcome brother.

[@dj_sorra8605]

RESPECT BRO 🙏

[@moristo]

Thank you bro.

[@pajero910]

Nice music background....

[@moristo]

All music in this video is available on KZbin audio library.

[@santiagoluque1343]

Subtitulado en español. Excelente felicitaciones

[@moristo]

Mi amigo, pido disculpas si hay un el equivocado o no es apropiado.

[@santiagoluque1343]

@@moristo esta perfecto muchas gracias por compartir tus conocimientos !!! Saludos

[@moristo]

Muchas gracias, me alegra saber eso, y me alegra que me hayas apoyado.

[@wecreations4594]

Super

[@moristo]

Thanks.

[@exismedia7032]

Mantuul....nice video ...

[@moristo]

Terima kasih.

[@mommyaek5985]

keren,..wuisssss pakar nya memang

[@moristo]

🤩 terima kasih.

[@nendareffendy5065]

Apakah bisa langsung ke input amplifier .atau harus menambah komponen lagi

[@moristo]

Pada dasarnya LM3914/5/6 masih membutuhkan Pre-amp 1 tingkat untuk bisa dipakai pada Line In/Out.

[@nendareffendy5065]

@@moristo circuit seperti ini tidak bisa langsung ke in L R amplifier class d

[@moristo]

Sesuai data sheet, pada dumumnya LM3914/5/6 membutuhkan Pre-amp 1 tingkat untuk bisa dipakai pada Line In/Out (R & L).

[@nendareffendy5065]

@@moristo gitu yaa..okey terima kasih

[@moristo]

Ya begitulah, tetapi itu semua tergantung dari besaran output sumber suaranya.

[@pramodmohanty6192]

Can we use 50 leds in series in both sides? Please reply bro

[@moristo]

In 12 volt we can only install 4 pcs 3 volt LEDs in series for each pin the IC output.

[@pramodmohanty6192]

@@moristo Thanks for the reply. Can you make a project based on more LEDs with minimum components?

[@moristo]

@@pramodmohanty6192 You can see my latest video Cupid's VU Meter LED", it's more than 100 LEDs.

[@JanFanatic]

Can i use 6v or 9v center tapped transformer? Is it possible to extend to 20 led for each channel with another one lm3915 ic? Your audio input source?

[@moristo]

You can use 6 or 9 volt CT transformer, You can expand 90dB for LM3915 (30 LED), in this video audio input connect directly to speaker.

[@JanFanatic]

Thanks for responding..i made 20+20 led each channel with 4 ics..and i used Bluetooth audio module kit's output alongwith lm358 basic op amp. Powered with mobile charger..can i use bc547 instead those transistors..

[@moristo]

You can use any TUN (Transistor Universal NPN), but you have pay attention into EBC pin.

[@JanFanatic]

@@moristo I have not found 300 or 350 ma transformer..but seen online 200 ma and 500ma transformer..may i order them?

[@moristo]

Friend, I said "at least 300mA", so it means you can use more than than that.

[@pramodbhavsar8945]

Can I use 12v 3amp transformer insted of 12 0 12 350 mamp. Transformer?

[@moristo]

Please thinking about at least 300 mA.

[@dj_sorra8605]

Transformer 12 - 0 is good?

[@moristo]

You have to change the secondary windings to make it 12v Center Tap transformer.

[@iwonrius6759]

Good,,,,i want to make ,,now

[@moristo]

trims bro, Gbu.

[@kopipahit5723]

Pake IC lm324n bisa?

[@moristo]

Kalau tau caranya bisa om.

[@shankar-prity-vlogs.]

How many watts of led in 20 level

[@moristo]

Every single LED is around 60mW (sixty mili watt)

[@shankar-prity-vlogs.]

Please Led purchase link in description

[@moristo]

@@shankar-prity-vlogs. Oh man, I'm not a seller.

[@JB-20]

I made a 7 band spectrum analyzer using single LM39XX...the technique is the switching which imperceptible to human eye. They're not actually simultaneously powered but due to speed our eyes are being fooled. Same to TV principle.

[@moristo]

Only smart people will know the secret of the electronic circuit in this video.

[@moristo]

But I know, your "7 band spectrum analyzer using single LM39XX" thats not mean single IC.

[@JB-20]

@moristo Yes, the system is not a LM39XX alone, there's another IC for freq assigned. But similar concept to your VU, only one LM39XX to drive seven 10segment LEDs. So 70 LEDs driven by only one LM39XX.

[@moristo]

I know that the other ICs is Counters/dividers, timer, and Bilateral switch.

[@JB-20]

@@moristo I don't have bilateral sw. Counters yes as switching like this two transistors do. I can make using only two ICs but more expensive. So I designed another version using three ICs. Complex design but more compact compare to multiple LM39XX.

[@عليالكترونيات-غ4ق]

👍👍👍👍❤❤❤❤

[@moristo]

Thank you.

[@adityabaladewa3966]

Karya karyanya emejing

[@moristo]

Teriima kasih bro, semoga bermanfaat.

[@karimj2220]

I cannot understand. Diagram please

[@moristo]

Just keep watching to catch circuit diagram.

[@yogiaudiosoundofficial3015]

Bang bikin led vu peak hold dong...hehe yg pake lm3915 cd4066 sama ne555 bang mkasih aku tunggu ya

[@moristo]

Saya masih experimen hanya dengan 1 IC saja.

[@yogiaudiosoundofficial3015]

@@moristo oke deh

[@moristo]

sip

[@moristo]

@yogiaudiosoundofficial3015 sudah lihat video saya yang hanya pakai 1 IC LM3914/5/6 yang peak hold?

[@erkalgedikli]

Video resolution is not good. Some of your works are not understood. It would be much better if there was a scheme or a clearer video. Thanks anyway. We will solve the uncertain places by trial and error.

[@moristo]

I'm sorry for the shortcomings in this video, and thank you for your advice friend.

[@erkalgedikli]

@@moristo I follow with interest. I'm an amateur. I find it very useful. Thank you.

[@moristo]

For schematic diagram the circuit on this video you can see on my another video "Circuit diagram Single IC stereo LED VU Meter LM3914 or LM3915 or LM3916".

[@erkalgedikli]

@@moristo thank you

[@moristo]

You are welcome.

[@shankarkarri5721]

Circuit diagram pliz

[@moristo]

Schematic already in my another video.

[@shankarkarri5721]

@@moristo link pliz bro

[@moristo]

Please find it in my video list with the video title "Circuit diagram Single IC stereo LED VU Meter LM3914 or LM3915 or LM3916".

[@electrokirana3668]

It is not possible for stereo there must be two LM ic

[@moristo]

Well, You need to learn electronic friend.

[@electrokirana3668]

@@moristo The ic has only one input for audio so can you prove with diagram Sir

[@moristo]

Well, You need to watch carefully without skip avery scene.

[@moristo]

Friend, if You really need the schematic diagram, so you can draw it yourself while watching, just use Play/Pause button to catch something for details.

[@funtimejokes2020]

brother give diagram plz

[@moristo]

Sorry bro, the circuit schematic diagram is only for who are with electronic skills, instead everyone with electronic skills can draw it self while watching the video.

[@JSunday45]

@@moristo Not in this jumble...also a diagram helps to understand what's really happening cuz doing and understanding are different things.

[@moristo]

If you need a diagram to help you, you can draw it yourself.

[@beenjhbayladharmik8692]

What whach yours vidios Indian peoples Bro diagram Whithout digrams difikl

[@moristo]

I'm Indonesian. Schematic diagram is only for electronic expert, on the other hand electronic expert can draw schematic diagram by him self, so please draw it yourself. Thank you for watching.

[@elviselvis8854]

Elvis Chennai

[@moristo]

What is "Elvis Chennai"?