How to make audio level indicator with LM3915 ic - freeform circuit │SimpleCircuits

Hello everyone, have come back to my channel. In today's video I will make audio level indicator with LM3915 ic. This is a very common simple circuit. There have been many instructors to make this circuit. But I do it a bit differently, freefrom circut.
Hope you guys will receive it
Components I use:
- 5mm yelow LED x8
-5mm red LED x2
- LM3915 ic
- 1k2 resistor
- 10k pot
-1mm core wire
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[@SimpleTechvn]

Cám ơn các bạn đã xem video, hãy nhấn like và đăng ký kênh để ủng hộ mình nhé ! Video mới nhất- new video kzbin.info/www/bejne/fanQZ3mIZpZlqck I'm from Vietnam, thank you for watching !. Thank you very much for watching the video. Good day to you!

[@ЭльмираЭрвира]

Под :) дробь. Ся!

[@shuvo1348]

A

[@Nayana244]

Hlw plzz help

[@Arijitkumar-qw5zh]

Bhut.acha.circuit.bnaya.aapne.mi.arijit.kumar

[@latinobazaar]

I made one of these when I first learned of the LM3915 IC back in 1980. Also, the LM3915 was a major component for steering control in the remote control riding lawnmower I built back in 1981.

[@СергейТерехов-ш9ж]

А я сделал бакомер На современных авто иногда глючит уровень топлива.

[@SoapinTrucker]

Wow!!! 1980! I was in 12th grade High School, and was just getting into LED's, in electronics class, and I think it was an article in Popular Electronics that first caught my eye about the LM3915!!!! I was filled with wonder and excitement! I never used the IC, but sure dreamed of the possibilities!!! LOL :) (I later built a breadboard circuit using LEDs to make a sequencer circuit though, and that quenched my thirst for the time! I was stuck on stupid, for marquee lights, like the old mechanical driven ones at carnivals!)

[@latinobazaar]

@@SoapinTrucker Kool. Glad to see there was someone else using the IC back then.

[@SoapinTrucker]

@@latinobazaar LOL Thanks, but I did not get to use it, nor even buy it, I just read about it in Popular Electronics, but sure wished I could buy it! :)

[@srijandas2748]

What your age now????

[@sirflop1220]

holy molly ! this is going on my speedometer ! thanks for the tip !

[@gerardlesenechal7599]

J’apprécie beaucoup ces petits montages

[@charlieross-BRM]

It is encouraging to see that special purpose chips I had over 30 years ago are still finding use today. I remember there are linear (LM3914), logarithmic (LM3915) and VU (LM3916) versions of these. I recently discovered that inexpensive function generators are still using the ICs I built mine with around 1985 - eg. Exar 2206 and others. I used to have stacks and stacks of Popular Electronics and Radio Electronics magazines. One time dropping off radios at a repair shop around 1985, I asked about an 'Ampzilla" I saw on the shelf with a repair tag. I was told it had been there for years because it was so old - no documentation could be found to aid him with one little component he couldn't recognize. I still had the 1969 edition of R-E with EVERYTHING needed to build that kit. He had it repaired within the week.

[@SimpleTechvn]

Thank you friend!

[@paulmichaelfreedman8334]

the VU version probably performs Fast Fourier Transform(FFT). That's a nice thing to have in an IC. Dave's Garage used an ESP32 to do all the muscle work (FFT among other things) for his LED matrix VU meter and spectrum analyser, but now I'm thinking this IC could be paired nicely with a raspberry Pi Pico, as that little thing is powerful but not enough for FFT. This chip can do that with the outputs tied to the Pico's GPIO inputs. You wouldn't know if this IC also can perform FFT on a selected bandwidth for spectral analysis?

[@charlieross-BRM]

@@paulmichaelfreedman8334 I don't know. I'm not very good at going beyond 'cookbook' instructions. I really admire the guys I bump into while browsing surplus stores that can take some obscure items and turn them into something that performs better than the original and even some current devices for less money. They'd never tell the surplus store that or the prices would go up :)

[@paulmichaelfreedman8334]

@@charlieross-BRM I just checked out the datasheet (Why didn't I just do that instead of asking, duh!) but it's a very simple setup. No spectral analysis, just analog level to digital conversion for the full spectrum.

[@Tusharartgallery]

Vai kya video bnaya hai aapne yar dil khus ho gya...itni safai k saath apne explain kiya hai😍.god bless..apka channel bohot aage tak jae🙏

[@DamirUlovec]

There's also a "dot" mode featured with this series IC, too bad you didn't covered it. :)

[@HappyHermitt]

I looooove these free form circuits. Is there somewhere online that I can find more of these projects?

[@thevalathathayalan8577]

I Like This.

[@nihalkumar2521]

Nice Work 👍

[@thetypingape2073]

This is wonderful.

[@godsinbox]

I do not want to do this, but thanks, algorithm

[@mdkatechno8051]

Good

[@bogoulbog6964]

Thank you i need that for add to my metal detector,do you think is good for visualisate a acute sound?

[@SimpleTechvn]

Hi friend, with your idea, I think I will have to change the input circuit, depending on the signal level of the metal detector!

[@bogoulbog6964]

​@@SimpleTechvnThank for your reply. The output is a jack plug for a headphone,if u need more tech info i can search. I have this idea since lot of year,but never find howto.

[@fakhersalem6319]

Thank you. But how to make a water level indicator with just tow wiers withs an variable risestor connected to the water.

[@coloradostrong8285]

But as the married widow drowned, the propane tank sang to the porpoise. When the helicopter proposed lunch, the propeller saw the midnight daylight yesterday at you. Laughingly, the robin gasped, while moonbeams ate marshmallows inside the deer. Aware of pencils, aroma heard floor tiles selling whales. Branded as lost is the umbrella, as it elopes at tires. The water wire seems positive across the mains.

[@carlosfernandocaicedoramir3708]

Buenas noches me puede ayudar donde puedo conseguir esa sold wire, le agradecería. Mucho

[@pcbland7850]

Amazing my friend ♥♥♥♥♥ Nice to meet you ♥♥♥♥♥ Best wishes for you ♥♥♥♥♥ Keep it up .............. ♥♥♥♥♥

[@SimpleTechvn]

Thank you !

[@davidwensboposaric5498]

Art!

[@HOBBY89]

super broo👍

[@arshadshaikh2746]

Sir bluetooth module mai kise laga o Lift right aur ground kider lagana hai

[@GrafMKristo]

To make this is one thing - you just need some dexterity. But how I'm gonna CREATE this? Hom much wisdom (how many books) do I have to have for such capability?

[@robertoloyola1639]

posso ligar 12 volts?? posso ligar na saída de qualquer amplificador??

[@جاسمالموسوي-ظ2ط]

Is there a replacement for the LM3915 because it is not available

[@TheotanyaSama]

You can find them on some cheap chinese DIY kits vumeters (They cost about $5 for the whole kit)

[@rociov11000]

Excelente y maravilloso, te felicito.

[@thekookaburr4]

Can you replace the aux cord with a microphone?

[@kennmossman8701]

no

[@teknoman117]

Freeform circuits are super neat to look at. Makes me think of an old vacuum tube shortwave radio I took apart years ago. The tubes were mounted and sockets and all of the other components were just point to point soldered between the legs of the tube sockets.

[@SimpleTechvn]

Thank you !

[@subinreghunadh3719]

Good

[@X-OR_]

I hate internet music !

[@der.Schtefan]

I would never be able to work anything this precise, let alone solder it. It would short circuit and burst into flames. Full respect for your craftsmanship.

[@SimpleTechvn]

Thank you friend!

[@atanubardhan8116]

Hey Schtefan, you are not alone man, I built a radio that never made a sound! So peaceful it was.

[@geoffmooregm]

I made one of these in highschool. I then machined a bar of aluminum for the LED'S which I had mounted on a separate PCB and used a ribbon taken from one of my old computers to connect everything so I could put the electronics in a box and have the display on the outside. Worked great 👍. I had plans to make several and make a big display with left and right channels and 5 bars each with filters on each so they would show different frequencies.

[@jacobpoucher]

Lol what high-school did you go to?

[@geoffmooregm]

@@jacobpoucher Just public school here in BC, Canada. We had a VERY nice wood working shop. A pretty good metal working shop and electronics. We were lacking an Auto shop which some of the older high-schools still have. But my school was new (at the time) and a full automotive shop was out of the budget. Two of the local schools have a very successful drag racing program which my dad was a part of way back in the day. Worked out good for me though. I was starting into cabinetmaking but discovered I was quite allergic to softwood dust so I switched to welding right after high-school and did that for 15 years and slowly transitioned into a full time welding inspector.

[@PVHyperativo]

Trabalhei como técnico em eletrônica há mais d 20 anos atrás. Esse tipo d circuito era minha brincadeira meu passa tempo, pena q a eletrônica mudou muito, hj sou da área da saúde, foi obrigado a mudar d profissão p não virar um "profissional obsoleto" como tudo nessa área d eletrônica vira um dia. Descartável.

[@ahmetavc6891]

How does leds not burn at 9v

[@AMMCElectronics]

Audio coupling signal circuit is missing. This circuit could introduce noises to the audio net.

[@jeanfrancoisvandiest9729]

hello again my friend 😃👋 just like for the passion of the drone fpv electronics is one of my passion too 🙂👊👍 can't wait to discover more, good Sunday and good hack see you soon😜✌

[@SimpleTechvn]

Thank you friend!

[@ukaszbiernacki8659]

3:10 amazing effect, keep filming this way

[@RotaryMarx]

looks real to me (edit : thank you for heart)

[@АлександрНиколаевич-д8х]

Простейшая схема. Но, так шикарно и подробно расписан процесс сборки. Автору 10 баллов!!!

[@rio_s4041]

Точняк.

[@wmonk5642]

Простейшая она с этой микросхемкой. А без неё?

[@juanmanuelguevaratorres1537]

Cuando ví la matrícula del IC me invadieron a la mente infinidad de aparatos como grabadoras, consolas, los primero stereos Panasonic y un larguísimo etc con este componente. Es nostálgico y bueno saber que a fechas recientes se siga usando.

[@scottsrcshop]

i wish i understood electronics more id love to add a similar feature to my lowrider rc car project on my page. its my first time using arduino.

[@DIYTractorstories]

Wow your creation is amazing. I love it. I've completed a cultivator science project. You see.

[@АнатолийМеркулов-п2ц]

Такой аккуратный и красивый монтаж и пайка это сложно очень. Сам всю жизнь с паяльником.

[@user-dl8yb2kw9s]

Правду говорят что все эти индикаторы дают помехи на звук? Типа из-за этого их не использовали на усилителях высшего класса! СССР например.

[@_GhostMiner]

*This is like the wonders of electro-mechanics* 😅

[@bravelyHomoSapien]

This one only goes up to 10. I’d make one that’s louder and it would go up to 11

[@rudydudestech9372]

I have made this- but its not working 😕. What should I do now?

[@martakaczynska2578]

Stadion Żużlowy wybudujj. Z parkingiem 3-4 Piętrowy , na Srodku toru połuż Panele o wymiarach Boiska do Siatkówki.

[@bangmai2554]

Good production. Slow work meet great help for viewer able to follows the project with confidence. Highly appreciate.

[@SimpleTechvn]

Thank you friend !

[@uukasz0236]

Hi, i have a stupid question. These LEDs are 2, 3 or 5 volts?. If someone knows please let me know I'll be thankful.

[@kennmossman8701]

Vf varies by colour and process Red color LED has a voltage drop of 1.8 (Other ranges 1.7-2.2) Orange color LED has a voltage drop of 2 (Other ranges 2-2.1) Yellow color LED has a voltage drop of 2.3 (Other ranges 2.1-2.3) Green color LED has a voltage drop of 3.5 (Other ranges 2.1-4) Blue color LED has a voltage drop of 3.6 (Other ranges 3.5-4) White color LED varies from 3V to 3..6V

[@fathomisticfantasy2681]

So, ummmmmmmmmmmmmmmm.... Where are the current limiting resistors on the Led's????

[@KT315A]

Я собирал такую игрушку, мне не понравилось, нет чувствительности, не хватает умиления, надо делать предварительный усилитель, а то, что собрал молодец👍👍👍👍👍👍👍👍

[@mallatv6292]

Very good. I like. Now my creativity is growing. Don't get tired of creativity.

[@mallatv6292]

11111

[@SimpleTechvn]

Thank Friend!

Your video was very good, congratulations! Just out of curiosity, were you copyright claimed when using this song?

[@SimpleTechvn]

Thanks for your attention. The songs I use are all from the YTB music library, you can see its name in the description!

[@korval71]

Klass!!!! Bro,I want пригласить к себе girl beautiful.Как ты думаешь,если я ей включу эту piece and favorite song-она останется mi hut?(Im sorry за англ-я study)Thanks большое

[@SimpleTechvn]

No problem, just use it!

[@alexkirlian]

Gosto de usar um diodo na entrada e um capacitor com um resistor em paralelo, ligados ao pino 5 do LM3914. Uma outra boa opção também é usar o LN3915 que é logaritmo e o 3914 linear.

[@MatthiasLenardt]

Really good! Keep on rockin'

[@tennivarghese867]

Excellent fitting.. Congratulations..super creativity..

[@ZebbMassiv]

Imagine a whole dj mixer built like this. This is just one part of the puzzle.

[@khoa-ursidae]

Từng làm cái mạch giống thế này cơ mà cách ứng dụng hơi khác

[@joeschlotthauer840]

I wish you were my neighbor, Good for me, Bad for you...

[@danz409]

now build like 12 of them and put different frequency filters on each one for a DIY visualizer :D

[@mmom6056]

Smart circuit good job.

[@Hasan...]

How neat do you want it to be? Him: Yes.

[@paripatra2253]

This project her doing and riting about me

[@paripatra2253]

Page

[@creativitymeetsinnovation]

Bro, Please tell me what kind of WIRE you are using to hold those LEDs, please tell the name of that WIRE (gauge, thickness, copper or brass) what is the name of that WIRE please please tell me. Please reply me. Thank you.

[@SimpleTechvn]

Hi friend, I use 0.8mm or 1.0mm copper wire. You can tach it from single core cable. Once you're done, apply a protective coat of wire protection!

[@creativitymeetsinnovation]

@@SimpleTechvn thanks many many bro..

[@Luffysolos8241]

Do I have to use the LM3915 ic or can it be a different one?

[@SimpleTechvn]

You can use similar ic, for example lm3914,lm3916.. (may have to change the component value)

[@Luffysolos8241]

@@SimpleTechvn Ok thank you

[@end.corruption]

Led at the bottom.goes off while.the above ones are still.on, not that great

[@johnvcougar]

Funny, the sound is trash distorted but the meter never hits the red … must be calibrated for DJs 😅

[@2150dalek]

I need to apply this for a 12v voltage level indicator.

[@motiranjanpradhan8959]

please make a video for water level indicator

[@shyamcleetus6936]

Brother I want to extend it as 20 led how to add another ic and extend the level plz tell me

[@ManveliLeon]

Add a second to the same schematic board, but its first lamp sensitivity is adjusted to be slightly more than the last lamp on the first board... :)

[@worldtalk4218]

bro tell me what the brand and watt number of your soldering iron which is using this project

[@SimpleTechvn]

Hi friend, sorry for the late reply. I use a 63-37% soldering iron brand Hirosima (Japan). And 60w ceramic core soldering iron (no brand)

[@satryaadiputra]

Untuk tape radio bisa bang ? Apa perbedaan nya dgn yg tanpa ic dan transistor bang ?...

[@ganeshgowlikar9171]

How to use same uv meter for whater leval because we need simply to wering its possible?

[@kikeestrella127]

Teniendo protoboard y lo suelda?🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️🤦🏽‍♂️

[@SimpleTechvn]

Thank you !

[@_dec0d3d88]

Самый противный монтаж деталей, на плате намного лучше

[@ETVNicaragua]

Hand Wire assembly.. is the best to learn electronics.

[@cryzz0n]

I made one of these in highschool. I then machined a bar of aluminum for the LED'S which I had mounted on a separate PCB and used a ribbon taken from one of my old computers to connect everything so I could put the electronics in a box and have the display on the outside. Worked great 👍. I had plans to make several and make a big display with left and right channels and 5 bars each with filters on each so they would show different frequencies.

[@wizardnotknown]

Looks like the circuitry works, but that is just disgusting.

[@RemeslennikCW]

Просто и доступно, при этом перфекционизм зашкаливает!!!👍🏻👍🏻👍🏻

[@arqamch710]

Last 3 LED's were not working

[@WilliamLDeRieuxIV]

next circuit....a filter for that speaker.

[@Kimchi_Studios]

Dayum! This exists? I have to try now👍

[@SimpleTechvn]

Thank you friend !

[@hatmalsuhbani9852]

نريد 5 ايسي كل نوع حسب الصوت pop& rok&sos&dis

[@BuluBuridSMDA]

This audio level indicator is for the audio mono output only 'right? Assuming use the audio stereo output, we should to make it 2 pieces of that. Where is should to put the minus cable audio stereo? Where the minus cable must be in separated mode (cannot be combined) on amplifier audio.

[@kennmossman8701]

you can make two or if you are getting the signal before the amp you can comine/add the channes by using resistors [say 10K] in a Y circuit

[@WTEENG]

한국에서는 이것을 재능낭비 라고 부릅니다. 회로에 대한 이해와 숙지, 납땜 결선에서 놀라고 갑니다.

[@SimpleTechvn]

Thank you friend!

[@ahmedfarouk1571]

How are you your friend Question Do you work with 42 volts

[@kennmossman8701]

read the DATASHEET

[@СергийБо]

Простой индикатор мощности-какая отстойная херня!!!

[@mayagaryd1876]

مرحبا كيف استطيع ان اصنع مثله 12v

[@orsoelectrons]

Nice sir please come home...

[@gaweown]

I am never seen before, i realy like this tutorial

[@rahulpatelgujratahmedabad3497]

GOOD TICHING KARTE HO AP THANKS 👍✌️👍👌👍👌👍✌️

[@matmuratabatov6603]

четки схема,спасибо брать.

[@KislyEmb]

Cắt móng tay của bạn! Họ trông thật khủng khiếp! Như một mớ hỗn độn!

[@ryanbarrett1949]

once again your steady hand and technique is really impressive

[@dharmendrapawar9558]

बता के बना कुच भी समजमे नही आ रहा है

[@mikaellarsen9509]

Please never solder like this again

[@Anhad1313]

Pl make 30 second automatically delay running lights changer 10 in zone

[@SimpleTechvn]

Thanks for the suggestion, good friend !

[@pityu2137]

I like how clean your work is in school we work with little white board you stick in the wire and ready to go but everyone just grabs a 1m long wire and boom its done and looks like shit

[@SimpleTechvn]

Thank you!

[@26c62626yamashita]

無理しないで　がんばってほしいです。

[@oliverbroad4433]

Can you even buy that IC now? The LM3914 appears to be available but only in square PLCC package. Incidentally in my opinion it is worth adding some kind of rectifier/smoothing circuit to convert the audio to DC, feeding audio direct to the chip produced a mushy blured bar as it tried to replicate the actual waveform, but with it smoothed the lower LEDs would light properly making a more satisfying column of light. Also I've seen a crazy design using 10 triacs to control 10 lightbulbs.

[@SimpleTechvn]

Thank you for your attention. Did you mean convert the audio signal to DC to have a variable voltage, make an audio indicator by varying the brightness of the LED. It's a great idea, in fact there is an app like that! (Sorry, I use translator)

[@oliverbroad4433]

@@SimpleTechvn Well we initially built our bargraph circuit using the suggested circuit and found that although it was a bargraph the column of lit LEDS sort of faded out at the top. As far as I'm aware that is what happens when you feed audio in directly, the LEDs flash at the audio frequency, on less than 50% of the time and effectively pulse-width-modulating them rather than cleanly switching them. I'm suprised you didn't see odd shutter effects when recording the video, your one looks remarkably good. We took the bargraph circuit we had and added a peak detector to rectify the audio. With peak detection the bar display really looked like it was going up and down and not just fading in and out. The resulting bar looked more "solid". I can't remember which peak detector we used, probably the simplest op-amp based one from the datasheet. Then we adapted the circuit to run well from 15V which is another story.