RhythmMaster 85

Hammer · Posted: Sat May 26, 2018 4:56 am Post subject: RhythmMaster 85

Hello!

This is RhythmMaster 85S (S mean simplified) device. It makes hi-hat and snare beats out of white noise generated by TL-431.

Full version have external clock source and bass drum generator with sidechaining feature. Still in progress.

1. When you will turn on this device, you will hear white noise with periodic scratches. If you do not hear the scratches, just wait until ATTiny85 will warm up or cold down.

2. Turn the knob, it will change beats.

3. Push the buttont once, it will change knob mode. In this mode turn the knob, it will change decay.

4. Push the button, hold it and turn the knob, it will change tempo.

Code: https://github.com/youcantignoremytechno/RhythmMaster_85S

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RhythmMaster 85S

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rhythmmaster_85s.jpg

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RhythmMaster 85S circuit diagram

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Hammer · Posted: Sat May 26, 2018 4:59 am Post subject:

To make it more interesting, play with envelope forms and noise timbre.

Examples:

rhythmmaster_85s_vinyl_noise.mp3

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rhythmmaster_85s_beats.mp3

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rhythmmaster_85s_tempo.mp3

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rhythmmaster_85s_decay.mp3

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StormB · Joined: Aug 15, 2013 Posts: 18 Location: Germany

Hi Hammer,
wich Bootloader need 1 or 8 MHZ ?
and how much for the Sketch 16 MHZ?

Hammer · Posted: Tue Jun 12, 2018 6:58 am Post subject:

I'm always using 16mHz. In this project you don't need bootloader, because there are no USB port, only power from USB. Use another Arduino as programmer or use USBasp - the best.

StormB · Joined: Aug 15, 2013 Posts: 18 Location: Germany

Hidiho Hammer,
wich transistor is right 2x 3904 npn or 2x3906 pnp
in your schematic you have 1 x3904 and 1x3906
but the symbol is for 2 x3906
thanks
StormB

Hammer · Posted: Wed Jun 13, 2018 6:53 am Post subject:

Sorry for mistake! I've update circuit diagram.

Left - 2N3904 NPN, Right - 2N3906 PNP

Hammer · Posted: Sun Jul 01, 2018 10:42 am Post subject:

Syncronized with DIY CV/Gate converter and soviet RITM-2 synth: https://www.youtube.com/watch?v=3kAqZwofJxg

Still without tom, but it will be soon.

Hammer · Posted: Mon Jul 16, 2018 6:00 am Post subject:

I've used for tom/kick Wien bridge based oscillator. I'ts working great with 4069. Only sidechaining part of the main circuit still isn't ready.

But I started to make case out of e-bike controller box. Sides are laser cutted vinyl.

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Hammer · Posted: Sun Jul 22, 2018 2:48 am Post subject:

Face deck

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phobos · Posted: Sun Jul 22, 2018 7:52 am Post subject:

great idea with the lasercut vinyl Very Happy

sounds good too.

Hammer · Posted: Sun Jul 22, 2018 9:06 am Post subject:

Thank you, PHOBoS!

A lot of interesting stuff could be cutted out of vinyl: https://www.instagram.com/youcantignoremytechno/

But it's not easy beacuse of releasing chlorine and condensating hydrochloric acid. CNC should be very good oiled, smoke should not stay in the room. Otherwise everything will be covered by rust.

Hammer · Posted: Mon Jul 23, 2018 7:40 am Post subject:

All functions are here: hi-hat, snare, kick and compressor. It's noisy because I still hold some wires in hand. Now I can solder all parts together, and draw the circuit diagram.

rhythmmaster_85_sidechain.mp3

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Hammer · Posted: Thu Jul 26, 2018 8:42 am Post subject:

Testing... New circuit and code will be here soon.

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Hammer · Posted: Sat Jul 28, 2018 1:32 pm Post subject:

New code: https://github.com/youcantignoremytechno/RhythmMaster_85
New circuit:

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Hammer · Posted: Sat Jul 28, 2018 1:35 pm Post subject:

Action: https://www.youtube.com/watch?v=gjMpMup9Sd4

Hammer · Posted: Mon Aug 13, 2018 2:44 am Post subject:

I've made the 4069 VCA for BassMaster:

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I think, that this is the way to shrinkify RhythmMaster!

Hammer · Posted: Fri Sep 07, 2018 6:18 am Post subject:

Random euclidean rhythms: https://www.instagram.com/p/BnbRhf3nOhH/