Finally youtube recommends me a good channel about electronics and sound. Great video and explanation. Gonna take a look at the rest of your content :D
Excellent work. I'm just now learning EE basics now with my school after working in signals analysis for a few years in the military. I'm super excited to trying and get to your level some day.
I really like the way you present circuits. You understand that the people who are interested in this material want to/need to see the schematics, and the theory, and the math. They wouldn't be here if they didn't. So layer it on thick and thank you for your time and energy.
very good explained video as always, but now that you opened up the rabbit hole of vactrols, it would be realy great if you can dive a bit deeper onto ways of linearising vactrols befor you go on with control voltage
Check out this oscillator topology my mentor invented: "Sinusoidal Oscillators Operating at Frequencies Exceeding Unity-Gain Bandwidth of Operational Amplifiers" is the article's title.
I know this comment is late, but I absolutely love your videos. I like following along with the math and i really appreciate when you show multiple design choices and why and when to go that route. I see that you are taking a lot of feedback from the community and i would like to mention something if you wouldn't mind taking it into consideration. A lot of the AC frequencies you work with are within hearing range (obviously because it's within audio signal range). Do you mind addressing whether these circuits work with frequencies up to a few hundred kilohertz? I know a lot of circuits are prone to noise and attenuation as you approach this range. If you could address this that would be absolutely appreciated.
Awesome explanation, sir any videos on Radio Control circuit's , explaining in detail the working of the circuit , how the signals are transmitted from transmitter to receiver to control the dc motors in the RC toys
im stupid, i cant follow you, and i fell like the day that i know enough to follow what you are saying i wont get any value because i'm gonna know what you're explaining, the video is great production and im gonna build this oscillator as a tool for audio equipment repair. About those ldr-led thingy (i didnt catch the name you call them, im from Argentina, i barely speak spanish, let alone english...i taught myself as i did with electronics repairs, who cares i know) theres a really good attenuator build called "lightspeed", i mention it because attenuator are useful and maybe is useful to you. Thanks for the video, hope someday i understand everything lol.
There is a series on op amps that is explained by an old man, and while it may seem boring, the way he explains things is just amazing. I do have a feeling that if you watch some of the first videos in this playlist, you will get a better understanding: ru-vid.com/group/PLL_nf1OmixTTd7rEoqoM6aJ5ZdI-V47vs Edit: I didn’t mean to offend anyone by calling anyone ‘old’. I am not so young myself lol…
I was just messing around with the same circuit, nice. I was thinking this could make a good simple sine lfo if you have big capacitors, and there is no point for super prisice voltage control if any for an lfo
Where did you hide the arduino? how many bits is the resolution of the sine wave? Just kidding. Man, I am glad that I found your channel, a pure electronics channel were you explain so beautiful the concepts of basic electronics.Sadly, many forgot that old school circuits and program everything on a microcontroller.
I'm very glad to hear you're enjoying the channel! I do agree that there is something to be had from the challenge of designing analog electronics. :) Glad to have you aboard!
Hello, I agree, this is such a nice channel, great content! I'm very fond of analog designs and tricks, even if the digital world pays my bills, I always go back to the "analog" parts of The Art of Electronics to have fun.
Heh. No classic incandescent lamp for the amplitude regulation? :) Nice explanation of the Wien bridge (if a bit hand-wavey - but that's perfect for beginners!) I think I'll skip over this step and go to a MFOS-style exponential VCCS. Only use a Pt-RTD instead of the old-style thermistor, they're getting hard to find and of dodgy quality while the RTD's are getting cheap.
Thanks You very much. I like your chanel because I understand better than the university class.great chanel.what it's the name of the app used for you?
It should do! You need a mid-rail reference as your 'ground'. I do mention in passing, should have made this clearer in the video. sorry! As long as you have c1 = c2 and r1 = r2 the frequency of oscillation is the 3dB point of the filters aka f = 1/(2*pi*R*C). If you decide you want to have different values for c1 & c2, or r1 & r2 the equation becomes f = 1/(2*pi*SQRT(R1*R2*C1*C2)). Which you can see simplifies to the first equation if the resistors and capacitors match. :)
hello! love this channel, it has taught me so much! I tried to build this circuit, but I didn't have a j113 so i tried substituting another N-channel JFET, a 2N3819 - i can't seem to get it to oscillate. I have confirmed that if I replace the JFET with just a trimpot I can start the oscillations by turning the trimpot. do these not work for this purpose, or is there something I'm missing?
is there a way to do this with 4.5 volts and a 9V power supply? I tried this circuit replacing all grounds with 4.5 and had no luck. the best I can get is a triangle wave or square.
@@TheAudioPhool So, I learned that you can take a single supply voltage supply like 9 volts, and voltage divide it between the positive and negative end, this gives you +4.5V and -4.5V. Then I can get the oscillator circuit to work. so if I wanted +15V and -15V, I would use a +30VDC supply and voltage divide it. There is no explanation of this anywhere online this I could find. I just had to figure it out. granted I have an associates in electronic engineering :).
Yes all the time. Very infuriating! Lots of people swear off them entirely. You just have to give everything a prod from time to time and I find it's ok for low frequency stuff like this! :)
@@TheAudioPhool but for real tho, this is the only channel on RU-vid I stop whatever I'm doing and pay attention thru the entire video. Incredibly engaging as a presenter and teacher, keep it up!!!
I understand why this circuit oscillates, but I don't understand why it generates a sine waveform, and not a cosh or sinc or parabolic periodic function. Could you explain or derive why it's a sine wave?
I think the simplest way to think about why the output would be a sine wave is to think of the oscillator as a very tight band pass filter with a unity gain at the oscillating frequency. In less jargony terms, the oscillator essentially mantains a gain of 1 at a specific frequency and a gain of 0 elsewhere. That specific frequency is a sine wave by definition. We know from fourier that sound is made up of an infinite sum of discrete frequencies, and that each frequency is represented by a sine wave of a certain amplitude and phase. We are just highlighting one of those frequencies, which leaves us with just one sine wave! :)
I was so dissappointed recently when I made a nice oscillator and on the breadboard it worked perfectly so I decieed to make a PCB and solder all circuit on the PCB and here the problems start... actually the main problem is no oscillation.
That could be caused by the small (or not so small) added resistances and capacitances in the breadboard connections. When you soldered the same components on the almost "perfect" PCB, you lost those extra random Rs and Cs that where used to tune the oscillator within its range. I had a similar experience when I was young, as I was not allowed to use my father's soldering station, I built my first small FM emitter "DIY kit" on a piece of cardboard and connected the components using a "circuitgraph" (wrapping pen). Surprisingly, it worked and my father was so impressed he printed the PCB by the book, with everything soldered nice and tidy, and the only way to have it kind of working was to touch the collector of a transistor in the oscillator part of the circuit...
Exactly! The same story but it gives me a lesson also to calculate everything more acuratelly and for my own so I will always know what it is going on..
@@terencekaye9948 Yeah on mobile applications the description is a bit hard to find. Next to the video title there's a little downward pointing arrow that you click on to reveal the description. Thanks for watching :)
Those animations are excellent.... If you were just talking about currents and resistances and negative feed back.... my head would go all muzzy and I'd completely miss what you were saying. But with the animations, the circuit, the changing values, the arrow growing and shrinking really help to show what's really happening. Great work!
Love this channel. One request, can you consider editing your videos so that we can hear the effect that we are creating at the beginning of the video? For example, It would be great to hear at the beginning of the discussion what the different wave types sound like. (sine vs sawtooth etc)
why is there an appearently necessary diode in your schematic (it doesn't work without it when i try it) but in the video it seems to work without it? Plus: The Video makes it seem as if R5 and R1 are 10k but in your Schematic it is 1M and 20k.... so to make that clear: the schematic in the discribtion works like a charm (it produces around 73Hz) but the cirquit as shown in the video doesn't work. for clarification: I used a stableized, clean +/-4.7VDC power supply, an OPA2134 OpAmp and an NTE 312 JFET because those where the parts I had at home. I doubt however, that the diode was needed because of the difference in parts... I would be thankful for clarification
Really cool video ! Although, I was wondering, instead of using a JFET to make the total gain greater then one, wouldn't it be cheaper to use a RNTC resistor ? We replace R2 by this resistor which would have a standard value greater then 20k ohm and would then decrease to 20k ohm as the circuit increases in temperature. Thanks for the video !
The original circuit (from the 19th century!) Uses an incandescent bulb to do exactly this. Lots of different ways to build anything! Give it a go and let me know how it goes :)
Best, SO FAR... IF you want something really simple, or quite advanced, check me out. I am making content because there is so much shit on RU-vid! Dave, Fran and all the other idiots make us EEs look like fruit loops.
One thing I like about eletronics are those "unusual" ways to use components. Even with explanation I could not really understand the jfet self oscillation part. I'm really a noob, I would use a 555, a LPF and a opamp
thank you! what a wonderful resource! I've been getting into circuitry in an audio context and it's been a bit difficult to parse the information myself. I will be following along and learning!
Thank you for this another great video! I am not an "audio guy" but I like building audio stuff because it is a great way to learn about analog circuitry while still having a lot of fun! Your videos were a great help and a fantastic source! I hope you keep up the good work! Best wishes!
