this channel is unreal. no fluff, all the necessary information, clear step by step diagrams, detailed explanations, BOM in description. thank you so much. Grüße aus Kalifornien!
I hadn't realized there was a BOM in the description until I read your comment. I think I have all the components already, but nevertheless that's some dedication by the author.
Best intuitive electronics lessons I have seen on YT, and I have seen many. You are niched into only synth nerds here. Clip out the pure electronics lessons and your following will be huge.
Ich habe dieses und mehrere andere Videos gefunden, die Sie durch Glück erstellt haben, während ich auf RU-vid stöberte. Ich habe Mitte der 1970er Jahre mit Elektronik angefangen, also habe ich eine sehr gemischte analoge und digitale Sichtweise. Schade für diejenigen, die jetzt anfangen, dass in den 80er und 90er Jahren viel nicht triviales analoges Wissen in ein schwarzes Loch gefallen ist. Danke, dass du geholfen hast, es zurückzubringen!
Mate, this video and the last one has taught me so much in 1 hour. Lots of things clicked in my head and it just makes sense. Amazing work, and thank you so much.
Very nice. I was already familiar with all the principles here, but I've never seen as clear and concise a discussion of them. Even if just from the standpoint of op-amps which are a great building block for a LOT of analog electronics for any purpose. Great job!
Loving this series 👏👏👏👏 your explanations are so clear and concise! In addition to seeing the final schematic, it would also be awesome to get a little closer look at exactly where you're hooking things up to the breadboard while you're doing it! Regardless, I'm forever grateful for your content and can't wait for the next video!!
Thank you so much for all the crystal clear explanations applied specifically to audio. Like after each one of your videos, so many thinks are so much clearer for me now !
This is amazing tutorials on analog sound electronics. This reminds me to try finishing my DIY guitar pedal PCB schematic and launch it into production.
Hi! I come across your videos a bit late, but wanted to thank you for them! You explain things that looked super complicated in such an understandable way! And it's absolutely on the topic wanted to learn things! Thank you so so much for that!
Hello and thanks for taking the time to explain these beautifully! Even for someone who knows their way around op-amps, this presentation style is still useful! Two additions if I may, I havent yet laid the circuit out on breadboard but from what I can see, I think that the stereo 100k pot should be of the logarithmic type and connected so that fully clockwise you get the lowest resistance. In that way you get a mostly linear sounding frequency response (our ear has a logarithmic response), with the highest Fc coming from the most clockwise pot position. Also adding a 680 Ohm resistor in series with each side of the potentiometer should limit the highest Fc to around 23kHz, maximising the usable range of the potentiometer's turn. These are just hunches at the moment, that I quickly scribbled on an excel sheet, I will test them out and report back. In any way, they are minor stuff and do not in any way take away from your tutorial!
This is really fantastic! I had to rewatch a few parts to get it, but the build up piece-by-piece is really wonderful for understanding why everything is designed the way it is, and how it works together. I feel like I’m definitely learning something new! One point though, it’s not really clear to me why you want to clip the resonance feedback path with the diodes, besides it sounding better. All the other steps seemed pretty well motivated, but this seems like something you get to via trial and error? Perhaps I just can’t visualize how it affects the output. A look at the o-scope at the end would be great!
totally agree, the clipping diodes are something i threw in as a kind of bonus. think i'll do a more in-depth explanation next episode .. or maybe in a spin-off quick tip.
Great video as always, but you might want to discuss the roll of phase shift on the resonance. (Also understanding phase shift is pretty important for feedback too :) )
Nice series, I’m really liking it. Being a digital electronics guy by nature, it’s nice having a ‘refresher’ on analog theory. That said, I noticed that you haven’t really mentioned a lot about the types of POTs you’re using. I presume they’re all logarithmic?
A simple way to explain how a voltage divider works can be like this: When you apply a voltage across a resistance, the voltage drops in a smooth gradient across the resistor. One way to reason about this is that the same amount of current is flowing across the whole resistor, but the resistance gets smaller as you get closer to the opposite end (because there's less physical distance between the given point and the other end of the resistor). Therefore, in order for the same amount of current to flow through the whole resistor, the voltage at each point in the resistor has to be proportional to the resistance from that point to the opposite end. A voltage divider splits this up into two (or more) resistors of fixed value. An example is if you have two resistors in series with the same value, the voltage across each of them will be half the total voltage, as the current across each of them is equal to the current across the whole thing, but each resistance is half the total resistance. The value of each resistor can be varied to give different ratios for the output voltage. (the following is some elaboration that can be left out) If you have the bottom resistor connected to ground, the output will be equal to the input voltage multiplied by the ratio between the grounded resistor and the total resistance of the divider (assuming you don't have any load on the output). As an equation, this is V * R2/(R1 + R2), where R2 is the grounded resistor, and R1 is the upper resistor. An example is if you have two resistors in series with the same value, the voltage across each of them will be half the total voltage, as the current across each of them is equal to the current across the whole thing. A potentiometer is a fixed resistor that you touch with a movable conductive contact to access the different points on the voltage gradient across the resistor.
This series is amazing and i find myself more and more interested in breadboard mechatronics every minute. Do you have any recommendations on kits or gear to start out with? Thank you for the content! And I hope that you read comments on videos this old.
unfortunately most of the breadboard kits out there are microcontroller focussed, so they‘re not really suited for building analog audio stuff. essentially, you need a breadboard, two 9V batteries with clip connectors, a set of jumper cables, resistors/capacitors/potentiometers of different values (check my circuits for common values), op-amp chips (e.g. TL074), audio sockets (e.g. thonkiconns) and a couple NPN and PNP transistors.
your videos are great, i read somewhere if u substract a lowpassed waveform from the source waveform u get a hipass waveform, doing this is no problem to u i guess, keep doing videos man!!
I honestly really love the diode-free version. Reminiscent of a beautifully filtered 303. The diode cliiping makes it sound dirty and aggressive, which is cool, but I think it's less "musical" or "natural."
i tend to agree. though it's a bit of a pain to find the perfect balance between input signal amplitude and resonance amplification. the diodes make it a lot more forgiving in this aspect.
That's so cool man, I was looking for making a resonant variable filter but with Sallen & Key we're limited to a Q=3, with this topology you don't have that kind of limitation ?
Oh oh oh, because the amp is decoupled from the input in an opamp style way like using an optocoupler, although with other components? (Talking about that basic 2 stage filter from the last video)
I'm subbed but this isn't in my subscription feed. Is youtube pulling that shit again? I looked everywhere on my subscription page and absolutely nothing.
yeah but it's my fault. there's this box you have to tick for subscribers to be notified. i unticked it because the video went up for patreon early acess at first. then when i published the video, i forgot to tick the box. problem is: you're stuck with that then. no way to re-do it. lesson learned i guess.
Is there anywhere I can read more about resonant filters. I'm having a bit of trouble understanding 11:30 ~ 15:30 and would love some supplemental reading!
@ 8:00 Is some connection missing onto the breadboard? It seems that the two stages are not connected with each other as stated in the schematic @ 7:00. Am i missing something? Oh and btw THANK YOU!
Dr lanterman. You should add a thank you or membership to this channel so you can sink money back into equipment. If you guys have any students that need proper meters or soldering stations for personal use then just get someone to email me. I have a few decent stations from ali and other stuff.
Nicht das ich kein englisch verstehen würde, aber wenn du die Videos auf deutsch machen würdest, wäre das der absolute Oberhammer! Die Synth DIY Szene in Deutschland explodiert ja gerade regelrecht, aber gute Videos gibts eben leider nur auf englisch. Di hast die Macht den Kreis zu durchbrechen :) . Jedenfalls find ichs prima und verstehe auch endlich mal, welches Bauteil was und wieso macht, das ist wirklich cool! Viele Grüße aus der Stadt mit dem Herkules ;)
This is amazing! I love the filters on my xone 92 and was wondering how they worked. Could this be made into a part of an guitar pedal FX? This combined with delay and harmonic distortion would make a killer FX unit! (For DJ use)
yes that should definitely work. you can modify the circuit to work with a single 9V battery like this: tinyurl.com/y4s8koe2 - all op amps in that simulation are running on a 0V/9V supply.
Yea I def found my guide thru DIY, new patreon incoming. Do you have a list of parts to buy for someone that wants to follow your guides? I have nothing at the moment.
Are those capacitors that you are using meant for AC voltage only? Could ceramic capacitors work instead? I have not started testing myself yet, but I was just wondering in the mean time. thx!
Also, is your frequency that you are generating coming from the oscilloscope? I am still thinking about how to make my general setup (frequency source, speaker/audio output, etc.) Thx for any help!
P.S. I am basically starting from scratch for synthesis design! I bought some basic components a while back, including a breadboard, to apply my knowledge since i have taken some electrical engineering courses in college. I am actually a mechanical engineer tho! 😄
ceramic caps do work, but the general consensus seems to be that they add some distortion. foil/film caps supposedly don’t. it’s not a huge deal though.
