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DIY twin t kick drum module for modular synth

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This is my CD4069ube based Twin T kick drum module for my modular synth.
I fixed a couple of things from the schematic in the link below! I forgot a 10uF capacitor in the diode clipping circuit and forgot to mark the value of the capacitor of the power input.
The 0.22uF capacitor doest have to be polarised! For some reason I only had electrolytic 0.22uFs at hand at the time and I drew the cap like that in the schematic to see the polarity if needed. So you should be fine using any type of cap!
Here’s a link to the schematic in high quality: www.dropbox.co...
The circuit is based on Elliot Williams' Logic Noise articles on Hackaday. Here is the drum article: hackaday.com/2...
The circuit is also compatible with eurorack systems. My modular works on + and - 12V but using banana cables.
Thanks bye!
You can also follow me on instagram: / lauri_diy

Опубликовано:

20 авг 2024

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Комментарии : 127

@constantine333B 6 месяцев назад

OK this is actually sick sounding, I have been looking at way more complicated kicks for DIY but I'm gonna go for this one!

@constantine333B 5 месяцев назад

@LAURISDIYCHANNELTV can you share what kind of switch you used for the RC filter? It looks like it's just one double-pole or something, but I haven't been able to find such a thing online. I have been trying to think of a way to use one simple two way switch but I don't think it's possible. Maybe I'll just leave the RC filter always on. Should have breadboarded first XD

@LAURISDIYCHANNELTV 5 месяцев назад

@constantine333B you can search ”DPDT 6 pin” on ebay, amazon or whatever and you should find these switches! I guess you could use a single switch so that it disconnects the capasitor from the circuit (So in between the 10k resistor and the 104 capasitor.) When disconnecting the capasitor, that would leave the 10K resistor in the signal path but i dont think thats going to make a huge differnece, it should just make the output a little bit more quiet

@constantine333B 5 месяцев назад

Oooh good idea! Need to get my active mixer module together anyway so I can boost the signal there. Thanks man!

@aaronstclair2423 Год назад

I built this on breadboard. I like it. I'm gonna build a strip board and put it in my rack. Thank you for this!

@shean4 2 года назад

Thanks for your videos. Really have fun with these. I added a DC blocking cap to the twin diode clipping circuit (between the switch and the diodes), otherwise only one of the diodes turns on. I tested a few and 330u seemed good.

@LAURISDIYCHANNELTV 2 года назад

Oh shit I think I had like a 10uF cap there that I forgot from the schematic! I'll add it to the schema in the dropbox link if anyones wondering about this! Thanks for pointing that out!

@Rob_65 2 года назад

Nice sound. Thanks for combining this from all different resources. The origin of this circuit (as far as I can trace back) goes back to the January 1978 edition of the Practical Electronics magazine and it has been going around in similar form over the last 35 years. Your version works great there is just one error in the schematics: pin 8 and 9 of the 4069 are swapped (pin 9 is the input, 8 the output of the inverter) I made some small modifications to get it more to my liking: I changed the 104 capacitor on the input to 1 uF to get a better sound and I changed the 100 (10 pF ?) capacitor on the final gate to 10 nF. With the 10 pF capacitor the initial click on the drum was too loud for me.

@LAURISDIYCHANNELTV 2 года назад

Thanks! Oh yeah thanks for pointing out the error in the schematic, i always get these pins the wrong way in my schematics haha! And thanks for the improvement ideas, i’ll definitely try them out cause i’m building a similar drum to another project at some point!

@Rob_65 2 года назад

@@LAURISDIYCHANNELTV I was even thinking of building one of these with one of those more expensive (60 cents or so) IC sockets with round pins to be able to experiment with different capacitors

@LAURISDIYCHANNELTV 2 года назад

@@Rob_65 oh that would actually be preatty cool!

@Rob_65 2 года назад

@@LAURISDIYCHANNELTV I was thinking of putting this on the PCB such that I can play with values but I was just thinking it is way cooler to have them on the front-panel. Would be a great commercial module: a drum with a bag of capacitors so users can play around to get the sound they like 😁

@LAURISDIYCHANNELTV 2 года назад

@@Rob_65 haha that would be awesome!

@klassisch9093 2 года назад

Thanks a lot! Your videos are always so informational

@stefanhansen5882 7 месяцев назад

That bass sound is awesome!

@nmidu Год назад

yes man, big hug from argentnia

@flywittzbeats4008 11 месяцев назад

Thanks a lot Lauri, now it looks like a robot had diarrhea all over my studio space because I now have an electronics problem. Nice vids though (;❤

@LAURISDIYCHANNELTV 11 месяцев назад

Hahah i’m sorry! 🙃

@CircularMirror7 Год назад

Looks like a awesome drum 🥁 Gunna put this project on the list 👌

@piero9738 2 года назад

You deserve at least the subscribers of youtubers like Simon the magpie

@isaachorgan 2 года назад

if you end up making more drum modules, once youre done, you should make a drum machine with each of those circuits, and an analog sequencer bcus analog sequencers are cool

@LAURISDIYCHANNELTV 2 года назад

I’m planning on making more drum modules and i have already started to build a drum machine separate from the modular! And i also might build a standalone trigger sequencer in the near future, because it would be very useful with the modular as well! But i have no idea when these will be actually done, because my projects tend to take forever to finish haha

@flywittzbeats4008 11 месяцев назад

That thing sounds so damn nice 🤣

@zhou_sei Год назад

dude wow

@shean4 2 года назад

This kick drum circuit gives a nice range of effects. I've built 2 of these now based on your cct. One thing I've noticed is that the circuit seems to pick up any noise/signal that is on the power supply and amplifies it. If I unplug the output of the kick drum the effect goes away. Anyone else noticed this? I've tried adding some larger caps to the power supply rails on the kick drum cct board. This reduced the effect a little bit, but didn't eliminate it. Interested to know if other people also see this effect.

@LAURISDIYCHANNELTV 2 года назад

Nice to hear the circuit has been useful! 😊 I havent noticed any noise problems with mine, but i only have a couple of modules in the same case at the moment! I forgot to mention it it the video, but you should remember to connect the ground connection of the inputs and outputs if youre using regular minijacks or jacks! But of course i dont know your setup or if that would even matter! But if anyone else has noticed a similar problem and has a solution, please let us know!

@cwrigh13 2 года назад

Another great video!

@LAURISDIYCHANNELTV 2 года назад

Thanks! 🥰

@Theaphextwin972 Год назад

With the cv or gate can you trigger the kick drum with trigger outputs on a drum machine like the behringer rd6 a clone of the 606

DIY twin t kick drum module for modular synth

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