Eurorack DIY: 909 Kick (Episode 1)
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- Опубліковано 25 лип 2024
- I need some drums in my Eurorack, so I'm building some 909 modules. First is the epic 909 Bass Drum, where I start by looking closer at the 4006 based Noise Generator.
You can find all of my designs on my GitHub:
github.com/tkilla64/eurorack
Some modules that I have designed myself are available in my Tindie shop:
www.tindie.com/stores/tkilla64/
Thank you for watching!
#eurorack #synthdiy - Наука та технологія
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Great idea! I was always too afraid of this giant schematics, very happy to start this serie with you
I know what you mean - parts of it are really hardcore analogue design...
I love to which lengths you go go keep the sound authentic.
Thanks a lot!
Halo Meebilt .Splendid idea to make 909 modules .looking forward to building them .
Please ,keep going
Thanks in advance
Grtz,The Moonscietist
Thanks! Yeah, this will be fun I think 😁
Cool! I have this on a breadboard in a drawer somewhere connected to an lf398. Can't wait to see what you do
Awesome! I'm working on the next episode already.
Happy to see this is under way, I have built an 808 kick from an open source design, but never got around to any further drum modules. I trust this one is in safe hands!
Thanks Clive! I will do my best to make it faithful to the original 😀
@@MeeBilt the attention you gave the bass buddy was amazing, you have set the bar high for your future projects! Hope you can add a trigger button to your drum module(s), my 808 kick has one and I find it very useful (and fun), and ofcourse, atleast one LED...
@@cr0wland A button is a great idea, I haven't thought of that.
i have just found your channel - THANKYOU for going through everything in perfect step sizes, just enough info. excellent clarity brilliantly explained - you have tickled my love for DIY audio electronics, & tugged at my enthusiasm for all things DIY audio and the half assembled CGS modular (ken stone) - stuff video editing, stuff the sound design project im gonna build myself some modules thanks to you - looking frwd to the next 909 installment - also inspired by your 3D printing - you're opening up doors of possibilities - keep it up!!
Thank you very much for the nice comment. Best of luck with your projects!
A great video and a great idea. I love your in-depth analysis of the schematics - now I am a bit closer to understanding the 909 :). You are an excellent teacher. Thanks!
Thank you, my friend. I guess only Tadao Kikumoto fully understand how the 909 works 😄
You can get CD4006 from Futurlec for $0.75 each. You can get NTE4006B (an equivalent) from SynthCube for $2.00
Yep, they are not impossible to get hold of - I actually bought mine from the only physical electronics shop near where I live. There are probably less than 5 of them left in whole Sweden nowadays 😥
Anyway, I wanted to build something with SMT components that I can get hold of easily.
I had the idea, but gave up when I had a look at the schematic. Kick, snare and hats were on my wish list/dream list. If you need some support, I would be willing to to co-sponsor some runs at EasyEDA/JLCPCB and help test it. Looking forward to this series regardless!
Those are my favorite voices that I will try to cover them in that order! I will probably do the Rimshot and Handclap too, the Toms will come last I think.
I'm using KiCad but I'm open for collaborations - this is a big project.
What about using a diy "noise chip" instead? You can program the lfsr digitally. The rest of your circuit will be still analog, while you save a great deal of components for the noise part. An Attiny85 could do the job
That is definately doable, but the clock frequency of the LFSR is 300kHz, so the code might need to be optimised a bit to make it runt on a microcontroller. In my case I wanted to build a circuit that replicated the original but with more modern SMT components.
I also considered using a CPLD, but that wasn't really an option when I looked into it more in detail.
Love It !!!!
Thanks!
Tusen takk, Meebilt! I’m looking forward for this series. You give us a nice start because, as you said, the 909 schematic could be pretty daunting at first glance. Bra jobb!
Tack så mycket / Many thanks !
I have had everything including a TR-909 that was stolen from me in 2001.. my favorite is the Dijstar RiDrum TK-09..
Ahh man, that's rough! Hope you got it covered by insurance. The TK-09 seems like a very competent kick drum module.
the noise from the npn sound more rich to me...
You are probably not alone with that choice. I've seen a couple of circuits with a transistor noise circuit instead of the 4006.
@@MeeBilt i seen in the 808 documentary that roland used damaged or defective transistors they got at a discount because they couldn't afford new ones and the roland founder claims that this gave the 808 its distinctive sound or "sizzle". then when the 808 became a hit they had no way of getting a hold of such transistors so they couldn't capitalise on its success.