Digital VU Meter: Part 1, Simulating Analog Mechanical Physics

[@anarchytelevision8445]

I'm a CB talker and I really like the analog meters on my radios much better than the digital meters that really don't have that response of analog meters but this is really cool and I would love to have this modified into a radio. This is the 1122 Wingnut radio standing by channel 38 lower sideband frequency 27.385

[@markgreco1962]

Smiling ear to ear. This looks great

[@roarke222]

Here I am making VMU shells while listening to you make a VU Meter haha. Well done buddy!

[@sjm4306]

Cant wait to see your vmu shells!

[@Danny.._]

line in and out so it can be plugged in in-line with audio equipment would make it more practical. i would also love to see you send one to techmoan and get his impression of it.

[@Attilator]

Very nice, congratulations! I did some analog STEREO simulation on 2 different OLEDs, with a round shape scale, but had difficulties with the damping. Your loox cool, will learn for your code. Thanks. Looking forward to your upgrades!

[@Zenodilodon]

I thought about your point about how the needle doesn't behave 1-1 with the audio in most digital VU meters that mimic needles. It's just come to my mind that I can go the other way. Using a laser galvo and half bridge rectifying the signal input I could make a needle move just about as fast and pretty close to 1-1. That would be something to collaborate on :P

[@DrScientistSounds]

Looks fantastic, really nicely done!

[@thetynings]

You did a great project, it's not PID controlled though, I think you meant that the input signal is low pass filtered? PID control requires a sensor on the output of the system to feedback and subtract from the input signal.

[@sjm4306]

Pid just means there's proportional, integral and differential terms in a difference equation to calculate a next step action. Closing the loop to make a pid compensator of course requires feedback but the term pid itself doesn't necessarily only refer to compensation. I agree though that I didn't make a closed loop control system, it's just a simulated damped system that reacts like a mass and spring setup.

[@thetynings]

Yeah, so it's a low pass filter applied to the input signal. @@sjm4306

[@Bao_Bab666]

Well done, nice idea ;) Easter egg needed : drunk mode with infinite oscillations hahaha

[@sjm4306]

I love putting easter eggs into my projects. Perhaps a metronome mode would be neat!

[@Utoobyourself]

Very cool projects you come up with! I really like the volt meter 👍. This is why I subbed to your channel cause you have great project ideas. Nice work!

[@ppg_forever]

Send a pair to Techmoan!

[@MasterControl90original]

that's very VERY neat!

[@venomdedpol1179]

Cool! Nice work!

[@ErikLegerstee]

Very nice!!! I'm wandering what kind of display that? Any type or links? (I like the big size)

[@sjm4306]

The big one is a 2.42" 128x64 SSD1309. Last I checked they are around $20 on ebay. Here's a search for them: ebay.us/YyRTNq

[@ErikLegerstee]

@@sjm4306 Thanks allot mate!!

[@krishna34674]

very cool !

[@collinsstudios7098]

Hey! Incredible work! Did this ever get completed?

[@sjm4306]

I made a pcb and got as far as soldering it and started testing before I had to pack everything up to move to a new house and ... I honestly have no idea which box it's in right now as I haven't had the time to unpack everything lol. I'll definitely do an update video once I find it.

[@collinsstudios7098]

@@sjm4306 - just curious! Haha I’ve been researching starting this product myself for awhile now and you sir have made the gold standard in my opinion

[@mut34rus]

Здраствуйте ! Вы доделали проект vu metr?

[@keenvox8774]

Will there be any updates? Would love to use your code on my VU. :-)

[@giathuyle]

Please give me the final code. My simulation display only background but not display the needle. Tks

[@sjm4306]

The code linked in the project page is the exact code I demo'd in the video. If it's not working properly for you there's some other issue.

[@quangmi3402]

Hi! Could you please tell me how to put a signal into pin A0 so the needle works?

[@sjm4306]

It's an analog input so literally takes any voltage from 0 to 5v.

[@RupertHirst]

Looking good !!! any updates?

[@sjm4306]

Currently working on the analog end, will have an update soon.

[@RupertHirst]

@@sjm4306 Great :)

[@GizmoTheGreen]

kinda wanna see music run on this

[@sjm4306]

100% that's gonna happen!

[@GizmoTheGreen]

@@sjm4306 eager to maybe build a set of these, hoping you opensource it. my brother would love this!

[@GizmoTheGreen]

I've now aquired speakers on my workplace workbench, and my 3d printer is ready 👀 hoping to make two sets of these. I'm sorry if this comes off as nagging, patiently waiting .. :P

[@adielawson6854]

How much you charge me to put a pair together to where I can wire them in place of the existing meters in a tape deck?

[@sjm4306]

Thanks for asking, I haven't had time to properly finish this project so it currently doesn't work with line level audio signals. When I get the time I'll add the necessary analog front end circuitry and post an update video.

[@Mahendramali123balotra]

Me anlog meter