Haraldswerk Quad LFO

I build two of these. I changed the capacitor values on one of my build to give me a really slow LFO. I like these LFO’s they end up in a lot of my patches. The module itself is a bit big a takes up quite some space but you never have to switch between outputs like on most other LFO’s where a switch sets the waveform. The waveforms are available straight on the panel. The led’s give a good indication if the LFO is on the negative or the positive side and therefor if it’s going slow or fast.

build report here: https://www.quinie.nl/building-quad-lfo-by-haraldswerk-de/
and for the gerbers for the panel: https://www.quinie.nl/panel-haraldswerks-quad-lfo/

https://www.haraldswerk.de/LFO/Quad_LFO/Quad_LFO.html

Difficulty to build : Hard

Haraldswerk Quad VCA

You can never have enough VCA’s in your rack and this module has four of them. I still find this one a bit tricky to calibrate. Maybe I should take it out of my rack and give it a second or third try to calibrate. I don’t use them as much as my other VCA’s (don’t know why). Depending on the build it can be DC or AC coupled. I believe mine is DC but have to double check that. I made the panel gerbers from Haraldswerks FPD file that you can find on his website

For the panel file: https://www.quinie.nl/panel-haraldswerks-quad-vca/

https://www.haraldswerk.de/VCA/Quad_VCA/Quad_VCA.html

Difficulty to build : Hard

Haraldswerk Buffered Multiple

Open for offers

This module is like the normal multiple but it does need power where the normal one doesn’t. It buffers the input and routes it to the seven outputs. The buffering can be important when working with a input that has to be exactly the same on the outputs like pitch. You don’t want your CV input to lose voltage when routing it to seven VCO’s. For trigger or gates it doesn’t have to be important (use the unbuffered one) but when the voltage has to be precise use this one. I have a few of these in my rack.

Build report: https://www.quinie.nl/building-haraldswerks-buffered-multiple/
panel file: https://www.quinie.nl/panel-haraldswerks-buffered-multiple/

https://www.haraldswerk.de/Utilities/Bufferd_Multiple_E/Buffered_Multiple_E.html

Difficulty to build : Easy

Haraldswerk Multiple

Open for Offers

I have a few of these. These are the most simple modules to build and handy to have in your rack. It is just duplicating the input to the seven outputs. It doesn’t need power and if you want to start building a module and never touched a soldering iron this is one to start with

more information on building one: https://www.quinie.nl/building-haraldswerks-passive-multiple/
And if you are looking for the panel files: https://www.quinie.nl/panel-harladswerks-passive-multiple/

https://www.haraldswerk.de/Utilities/Passive_Multiple/Passive_Multiple.html

Difficulty to build : Very Easy

Haraldswerk Utility Mixer

This mixer is great for mixing CV sources. I use it to mix LFO’s. I has a offset with negative 5 volt or positive 5 volts. A switch for attenuation (6db) a summing output and a inverted summing output. Handy little tool to have. It’s a bit difficult to calibrate unless you have the right gear, you will need a precise multi meter.

https://www.haraldswerk.de/Mixer/Utility_Mixer_I/Utility_Mixer_I.html

Difficulty to build : Medium, but you do need a good multi meter and some center dented potentiometers for this one

Haraldswerk / Thomas Henry Mega Percussion Synth (MPS)

Open to offers

I bought the book from Thomas Henry online at Lulu, it was a very good read and it has the MPS explained in it. I always wanted to have this module. And one day Harald had contacted Thomas Henry and got permission to design a pcb and panel for it and release it on the internet. Making this module available for me to build I was stoked. Harald’s design had banana jack and driven by 15volts. I was hoping he would release a version for eurorack 3,5 jacks and 12 volts.

On the modwiggler forum we started a discussion if it would be possible to convert his design to eurorack. I have contacted Thomas Henry and Harald and they both gave permission to do so. Thomas had just one request, please put my name on the panel so people will remember it was my design that started it. Surely we would do that. Together with other forum members we started our journey of converting it.

All in all it wasn’t that difficult. A few resistors changes and finding the right jacks and making the holes in the panel a bit smaller so it would hold the jack, that was it. The eurorack version of the MPS came alive. I was so happy to have this module finally in my rack after reading so much about it. The module can make all kind of sound. Bass drum, tom’s, lasers and much much more.

I still have to write up a build report and as you can see it’s quite a big module. I made two of these and if you are really interested I open for offers on one of them.

Again a big thanks to Thomas Henry and Haraldswerk for making it possible.

https://www.haraldswerk.de/Drums/MPS/MPS.html

https://www.lulu.com/en/ie/shop/thomas-henry/the-noise-generator-cookbook/ebook/product-1k8e6my7.html

https://www.birthofasynth.com/Thomas_Henry/Pages/MPS_project.html

Difficulty to build : Hard/ Medium, needed a few modifications and wires

https://www.quinie.nl/building-the-thomas-henry-mega-percussion-synth-mps/

Haraldswerk Precision Adder

Open for offers

Nice little module that can add signals together. I use this to add pitch signals. Run a sequence in it and then transpose the sequence once in a while. From Haralds website: It can be used in different ways: As three independent adders, as buffered multiple, adding a modulation source simultaneously to all three outputs, adding two, three or four voltages precisely and a few more, depending on your patch.

I havve a few of these so I’m open for offers on one or two of them.

https://www.haraldswerk.de/Utilities/Precision_Adder/Precision_Adder.html

Difficulty to build: Easy

HaraldswerkTrapezoid quadrature through zero VCO

A big name for a module “Trapezoid quadrature through zero VCO”. Well as you can see from the picture it is a big module for sure. I still need to calibrate this one and haven’t tested it a much as I would like too. I just needs some time with it to really tell something about it. For more background information be sure to check out Harald’s website.

https://www.haraldswerk.de/VCO/Trapezoid_Euro/Trapezoid_Euro.html

Difficulty to build:

Hard
Have you seen it size, lots of parts calibration and other fiddly stuff like matching parts

Haraldswerk ADSR

I have build a few of these and use them quite a lot. I have some spare pcb’s and panels in my drawers to build even more of these. (If you looking for a set contact me). The ADSR does what it should do and like most of Haralds design it very well designed. Harald based his ADSR on an Elektor Formant ADSR schematic. It has pretty good spec’s, if you want to know more about this one be sure to check out Harald’s website.

https://www.haraldswerk.de/CV_Sources/ADSR_Euro/ADSR_Euro.html

Difficulty to build: Easy