Dual LFO
This LFO is pretty versatile because of the range switch and the two waveforms but it has a design flaw. The tringle output can he easily loaded down so please add another opamp buffer a.k.a voltage follower to make sure it works nicely.
Author: knopsl
Baby 8 Sequencer
I built 4 of them and two live to this day, one as external and one as module. I cursed so much. If you decide against this build I really congratulate you for doing so. There are soo many better sequencer builds out there. Just don’t. For those that won’t take my warning seriously. Here’s […]
PU2 – Passive Utilities 2
This module is so simple and that is what makes it so versatile as performance module. It consists only of two SPDT on-off-on switches and every pin is connected to a jacksocket. I use it mostly to prepare patches, being able to switch between CV sources mid performance/jam makes it very useful to me. You […]
Cd4040 Clock Divider
This clock divider is pretty easy to build and there is no schematic because I simply built it using the datasheet. I found one that seems safe to use and some more info for builders. All in all it works and I use it for drum modules with gate to trigger converters some times or […]
Vactrol VCA
This module was a long time in my Rack but is currently not part of my setup because of bleedthrough issues. I built a better version for my portable setup. A lot of testing regarding vactrols components were done. And the best combination for lowpassgates and vactrol-VCAs in my opinion are 5549 LDRs and diffuse […]
APC-LFO-RCFilter-RCLadder
This was my first build and I was soo happy when I got it to work. It takes a 9-12V input through a barrel connector and has an on/off switch with LED indicator (which I had to rewire twice to get the right indication XD) It is an Atari Punk Console a.k.a APC with a […]
quad-buffered-mult
Soo this was the first mult design I built and it served me well, but I know it is very basic. I think it was originally from a LMNC post but I couldn’t find it on his page and he had since upgraded to a design where every output is buffered which is arguably the […]
Line-Out
Okay first of all I need to warn you. If you think this module just outputs a line level signal. NOPE! I just needed something to get the signal level down and being able to connect my junk headphones to. I never had any problems with either them (Teufel ANC 1st gen) or my old […]
Midi2CV – a pretty well documented horror build
My problem with this at the time of building was that there’s no complete schematic, only bits and pieces to puzzle together and a lot of info in the .ino file itself. I hope you have fun solving that puzzle. Link to the original project page: Projectpage Link to googledrive with all libs: googledrive To […]
Mixer – LMNC Stripboard version
Like for many of us LMNC was inspiring me to start with synthdiy stuff. This super simple Audio and CV mixer is easy to build and equally easy to extend. His new schematic has added mute switches for example. I built it from the original stripboard layout. But it is a bit too easy because […]
knopsl modular 