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 Forum index » DIY Hardware and Software » Developers' Corner
Thats what my diy synth looks like...
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Grumble



Joined: Nov 23, 2015
Posts: 1294
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PostPosted: Tue Apr 16, 2019 2:07 pm    Post subject: Thats what my diy synth looks like... Reply with quote  Mark this post and the followings unread

Posted Image, might have been reduced in size. Click Image to view fullscreen.
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blue hell
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Joined: Apr 03, 2004
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PostPosted: Tue Apr 16, 2019 3:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool

Not bad at all .. with all your own design & just a couple of years really.

Looks great Exclamation

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Jan
also .. could someone please turn down the thermostat a bit.
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Grumble



Joined: Nov 23, 2015
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Location: Netherlands
Audio files: 30

PostPosted: Wed Apr 17, 2019 1:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Blue Hell wrote:
Cool with all your own design

Except in the euro rack, that houses some designs not by me, but thanks for the compliment Very Happy

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ixtern



Joined: Jun 25, 2018
Posts: 145
Location: Poland

PostPosted: Sat Apr 20, 2019 1:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

Looks great. But I would like to see it closer. Would you mind to put here some more detailed photos, especially on eurorack modules?
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Lab-Elec



Joined: Apr 03, 2020
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PostPosted: Sat Apr 04, 2020 12:28 am    Post subject: Reply with quote  Mark this post and the followings unread

Cool! Please, keep posting details about your system.
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Grumble



Joined: Nov 23, 2015
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PostPosted: Sat Apr 04, 2020 12:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

This is my eurorack part, it has grown since the above picture Rolling Eyes


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Last edited by Grumble on Sun Apr 05, 2020 1:11 am; edited 1 time in total
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Grumble



Joined: Nov 23, 2015
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PostPosted: Sat Apr 04, 2020 12:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

A little description of this part of my system:
Top row:
Most left is a dual quad mult, nothing special about it.
Then in the middle, a new project for me which I'm working on at the moment, a drum sequencer, powered by a Blue Pill STM32F103C8T6, 8 channels out of which 4 have a 16 bits DAC as output, so they can be used as a trigger or as a control voltage for filter or whatnot.
I also plan to implement midi out especialy for the percussion midi channel 10.
Sadly enough I forgot to add inputs, so there will be a secondary panel with the inputs en the midi output.
At the moment I have a demo screen running and also the rhythms of the Minipops 7 designed by Jan Ostmans.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

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Grumble



Joined: Nov 23, 2015
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PostPosted: Sat Apr 04, 2020 12:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

Second row:

First module: Tap Tempi. It has an input to set (or follow) the tempo or you can use the button to tap twice for a tempo.
It has 5 outputs, and whats different from other tap tempo modules is that it multiplies the given tempo, so there is a 1x, 2x, 3x and a 4x output and one output where you can choose between the other 4 tempi. (nice for bass drum intervals).

Second module: The Electro Music Karplus Strong module, there is plenty of info here on the forum.

Third module: A transistor ladder filter with a twist of my own. Read about it HERE

Fourth module: Another Dual Quad Multiple.


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Last edited by Grumble on Sun Apr 05, 2020 1:14 am; edited 1 time in total
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Grumble



Joined: Nov 23, 2015
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PostPosted: Sat Apr 04, 2020 12:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Second Row, Fifth module: 2UG
A Dual Ultra Sound Controlvoltage Generator.
The Gates are high if an obstacle is placed (like a hand) within a certain distance from the ultrasound transmitter/reveivers and a voltage proportional with the distance is at the outputs. I have added a slew limiter to make smooth CV's.
Below are the two ultrasound transmitter/receivers in a 3D printed housing.


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Grumble



Joined: Nov 23, 2015
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PostPosted: Sat Apr 04, 2020 1:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Second row, sixth module is my iDRUM, a bassdrum of which you can set the waveform to sine, triangle or square, the click is set by a potmeter.
Basically the click is an effect of the start phase of the sine or triangle wave. You can imagine that the click will be more pronounced if the sine-wave starts at 90 degrees.
Also CV-able is the frequency, length and the modulation of the frequency.
The modulation of the frequency is a great effect to make the drum more punchy and if the frequency is set to a higher level you get more spacey sounds.

Seventh module is my CHUCKER, you can connect a nunchuck (from the Nintendo Wii) and it translates two gyroscope signals, three accelerometer signals and two buttons to CV's.
This module is under construction, since I'm waiting for (lots of) potentiometers from China...

Eighth module is the iSID, an Arduino controlled SID MOS Technology 6581
This is a module I designed for making drones (but not very succesfull yet) but I have plenty ideas for other purposes, like drums...

Ninth module is a digital attempt to make something like the Appendage.
Heavy under construction, needs a lot of wiring...
I called it the uPendage

Tenth module is a CV-able echo/reverb module free after Juanito Moore (HERE)


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Grumble



Joined: Nov 23, 2015
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PostPosted: Sat Apr 04, 2020 1:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

Bottom row, first module: A multichannel midi to cv module by Elkayem which I converted to a eurorack module.

Second module Ornaments & Crime. 'nuf said Laughing

Third module a Dual ADSR a diy module I bought and built.

Fourth module is a LFO/VCO around the AS3340 based on the Moog Memorymoog schematics as on the website from ElectricDruid
Fifth module is a dual version of the AS3340 oscilator except for the LFO switch and here the synchronisation (hard and soft) are added.

Fifth module is a mixer/VCA around the quad VCA AS2164

Sixth module is a second transistor ladder filter, to which I added a quad input mixer.


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htor



Joined: Mar 25, 2020
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Location: Leipzig

PostPosted: Fri May 01, 2020 2:23 am    Post subject: Reply with quote  Mark this post and the followings unread

this is great! really like the looks of that drum sequencer logo!
and those "midi/din-eyes" are cool!
following this thread...
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Grumble



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PostPosted: Sat Aug 15, 2020 12:10 pm    Post subject: Reply with quote  Mark this post and the followings unread


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blue hell
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PostPosted: Sat Aug 15, 2020 12:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh man - that's getting more and more - nice vid :-)
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Jan
also .. could someone please turn down the thermostat a bit.
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Grumble



Joined: Nov 23, 2015
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Location: Netherlands
Audio files: 30

PostPosted: Sat Aug 15, 2020 12:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thank you!
Problem is, I bought a Behringer usb soundthingy but the camera of the smartphone still uses the built in microphone Sad

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