CD4### IC's and circuits

[Vampyre]

HI all. I have a heap of CD40106 and other 4### series IC’s gathering dust. I have a bit of a soft spot for these IC’s and want to use them. Does anyone have any interesting noise, drone, drum etc circuits that I could use them in.

Thanks
Chris

[eric]

Look around the internet for “Lunetta synth” .

[Vampyre]

Hi Eric. I have made a few Lunetta type modules. Also went down the MFOS route.

[jaradical]

I haven’t got 'round to building one yet, but I’m looking at Linear Feedback Shift Register (LFSR Wikipedia) structures for digital noise generation as well as other funky ideas. You can do a lot of this with the CD4000 series.

Logic Noise: Taming The Wild Shift Register | Hackaday looks like fun.

Here’s a eurorack module based on an LFSR 22 things to know about the Turing Machine Eurorack Module

There’s also a couple of pages on them in Hal Chamberlin’s Muscial Applications of Microprocessors book - and their use in drum synthesis.

Cheers

[Dud]

There’s the Noise Bell with CD40106

Cmos noise bell

For those interested, a super simple, but effective module, a panel of hyper diversified metalic sounds (hit, snare, bell …) [Noise bell cmos module - sound bender (1)] [Noise bell cmos module - sound bender (2)] Only 2 out of 4 oscillators have a pitch setting (lack of space on this module), the other 2 have a trimmer, but a switch allows you to go from 2 oscillators to 4. the link schematic

A clock divider with CD4024

http://familjenronnberg.se/~niklas/diy/eurorack/divider/

SUB with CD4013

CD series sub oscillator

While not entirely in Kosmo format, I thought I’d share something I’ve been working on. It’s a sub oscillator based on some old school CD4000 series CMOS logic - that’s where I read about the CD4026 that Sam used in his googol [ thanks @eric ] counter. This thing will take in a signal and spit out an octave below, with an optional fifth or octave above. Here’s a demo of a prototype: Still a few issues to fix up, but you get the idea. Here’s the schematic - have at it. First o…

Sample & Hold with CD4093

White Noise + Sample & Hold module

here’s mine Kosmo format of a S&H from René Schmitz (with LF398 chip) [white noise + sample and hold module - sound bender (1)] “YASH” S&H : [sample and hold] White Noise : [51386_schmitz_white_noise_gen_circuit_and_stripboard_layout_2] link : https://www.schmitzbits.de/sah.html

Wave Shaper with CD4046 and CD4040

Verified Stripboard Layouts!

Barton Wave Shaper [image] Info herewww.bartonmusicalcircuits.com https://youtu.be/bvkvwY6iOfo [4046wave shaper] ![4046wave shaper|637x499]![4046wave shaper|656x500]

[analogoutput]

@eric

Look around the internet for “Lunetta synth” .

Or look closer to home

Lunetta Synth - CMOS and Modular Discussion

So I wanted to bring up Lunetta synths and have a few questions about it. My biggest question is - how do you get it to communicate with other modular formats safely? I have heard utilizing comparators for the inputs and transistor buffers on the outputs - but am wondering if anyone could further explain this. Lets start a discussion about CMOS Modular!

[Jos]

You can use them to make a midi thru device (a 74LS14 does the trick as well). Very handy e.g. if you have a few mono synths / single channel midi devices and want to share one midi output of your midi interface between them. 1 input 5 outputs: