Module a month part 3: May

Hi all!
again I am too slow with building, but a module is finished and I'm happy with it. This time the Mankato VCF from Magic Smoke Electronics. As always with their PCBs I have had a few problems with cold joints, but in the end it was all good. I used a kit from Woody's Electronics and the module was finished within two hours. Time for a picture!

What does it do, and what makes this filter special? First of all it is a filter and has 8 outputs: 6, 12, 18 and 24dB/Octave and their inversions. Those outputs have a phase difference of 45 degrees, so mixing the signals gives interesting filter slopes. Secondly the filter can get in self oscillation and due to the phase differences, it is a quadrature oscillator. The frequency range is really large, so it does work as an LFO too!
After playing around with it a bit I have to say for phat bass sounds the 18dB/Octave output is really yummie! The quadrature mode will be used when I've finished the module of June: the Oakley Quad VCA.

Cheers,
Woody

Finished the SN Voice!

Dear visitors,
I just want to let you know I finally finished the SN Voice today. Will calibrate the module tomorrow, and will post pictures then! :-)
Have a nice weekend,
Woody

Friday Evening Soldering Fun

Hi!
Got a nice bag with parts from MusikDing today. So it was finally time to finish some unfinished PCBs. As always I forget to order the right capacitor types. So for the Buchla LPG Clone (see NaturalRythm Music) I have to wait some more time, until I order more parts.
The good thing was: the other parts were in the package! So I finished the PCBs of the second Attenuverting Mixer by Fonitronik, the Sequential Switch, also a Fonitronik design, and last but not least the Thomas Henry SN-Voice! :-D
It's time to visit Zwolle once again, to get some more 0.156" headers for the power to finish the boards.

 

Top: SN-Voice PCB by sMs Audio Electronics. Right: Buchla 292c clone by Thomas White. Left, top: Attenuverting Mixer, bottom: Sequential Switch, both by Fonitronik.

Have a very nice weekend,
Woody

Working on the DIY modular: SN Voice

Dear All,
received a package from sMs Audio Electronics today with some parts to finish the Thomas Henry SN Voice. The SN Voice is a monophonic synthesizer voice with one VCO, VCA, noise source and simple Envelope Generator build around the SN76477, a chip used in the 80s in video games for sound effects. More information on the website of Scott Stites.
Inside the package were some special components to finish the project. So I added the components to the board and started on the panel components. Almost finished now, until I realized four capacitors missed. (See picture).

 I have to buy these capacitors to finish this project, and I hope I get this done before February.

Cheers,

Woody