CMOS HI-HAT + WHITE NOISE / making a drum machine EP 4

video upload by LAURI’S DIY CHANNEL TV

All parts here

"This is the bigger brother of the XOR cowbell! It has 6 oscillators going through 4 XOR gates, making the sound more complex and inharmonic, perfect for metallic sounds like hihats and cymbals. The next video is going to be about the high pass filters i'm using a lot in the video! They help a lot with this circuit, making the sound way more usable as a hi-hat. I'll put the video out in a week or two!

Schematics: https://www.dropbox.com/scl/fo/eab78o...

The logic noise article this circuit is based on: https://hackaday.com/2015/04/10/logic...

About the white noise generator on Synthnerd's website: https://synthnerd.wordpress.com/2020/..."

MAKING A DIY MODULAR DRUM MACHINE

video uploads by LAURI’S DIY CHANNEL TV

Playlist:

1 MAKING A DRUM MACHINE EP 0 / overview of the project + free sample pack!

Hey hey hey!

This is the introduction to a series of videos about my analog modular drum machine. I’m going to start posting videos about the individual modules so make sure to subscribe to the channel if you're interested in stuff like this! Sorry this first video has a lot of talking but there’s a bunch of sound demos at 7:53

The drum machine is powered with a regular 12V DC power supply, but all the circuits should be working from maybe 5V to at least 15V.

2. CD40106 MASTER CLOCK / making a drum machine EP 1

This is the first module in a series of modules for an analog modular drum machine! It's a simple clock oscillator and you can use the circuit as an audio rate oscillator as well.

Here's a link to the schematic and a zip file with the gerber files for the PCB: https://www.dropbox.com/scl/fo/4rxf1a...

Download some free samples from the drum machine here: https://www.dropbox.com/scl/fo/1qnq4t...

Thank you PCBWay for the circuit boards! If you want to order your own boards and you haven’t used their services before, you can get a 5$ welcome coupon with this referral link: https://pcbway.com/g/4TImAO Thank you goodbye! ❤️"

3. PATCHABLE DRUM SEQUENCER / making a drum machine EP 2

Heyyyy

This is my patchable CD4017 gate sequencer for the modular drum machine. The patching is kind of a weird workflow for a drum sequencer, but it IS fun and inspires you to program different sequences from your usual drum sequencers.

Here's a link to the schematic and a zip file with the gerber files for the PCB: https://www.dropbox.com/scl/fo/vrmmjw...

4. CMOS COWBELL / making a drum machine EP 3

Hello y'all!

This is my modular drum machines simple cowbell module! It's based on Elliot Williams' circuits from his Logic Noise articles.

Link to the schematic: https://www.dropbox.com/scl/fi/fd2hyt...

And here's a link to Williams' article about cowbells and cymbals: https://hackaday.com/2015/04/10/logic...

5. CMOS HI-HAT + WHITE NOISE / making a drum machine EP 4

This is the bigger brother of the XOR cowbell! It has 6 oscillators going through 4 XOR gates, making the sound more complex and inharmonic, perfect for metallic sounds like hihats and cymbals. The next video is going to be about the high pass filters i'm using a lot in the video! They help a lot with this circuit, making the sound way more usable as a hi-hat. I'll put the video out in a week or two!

Schematics: https://www.dropbox.com/scl/fo/eab78o...

The logic noise article this circuit is based on: https://hackaday.com/2015/04/10/logic...

About the white noise generator on Synthnerd's website: https://synthnerd.wordpress.com/2020/...

6. FIXED FILTERS (HPF & LPF) / making a drum machine EP 5

This is my CD4069 fixed filter module! It's 2 super simple circuits: a high pass (x4) and a low pass (x2) filter. It's a surprisingly useful module in the drum machine considering how simple the circuits are. The component values could be optimised better so the different filters would have similar volume levels, but I was happy with the sounds so who cares!

Schematic: https://www.dropbox.com/scl/fo/uit9zx...

I have been building instruments other than the drum machine as well and I think the next couple of videos will be other stuff, but I will then get back to the drum modules!