[PCBs] Oct/Hz and trigger converter

[sonicwarrior]

Got the PCBs for the Oct/Hz converter from Magnus Danielson and the trigger converter (Doepfer type) today. It's 7 cm x 5 cm. I have only tested it with +/- 15V and don't know if values have to be changed for +/- 12V as I'm not an electrician.
It is meant to use an Hz/V synth with a MIDI/CV converter that doesn't support it or an external V/Oct sequencer or voltage source. The trigger converter is needed to trigger the MS series with a standard voltage trigger as they are using an inverted trigger similar to the Moog switch trigger.


Here is the interest/development thread:
http://www.muffwiggler.com/forum/topic-23490.html

I ordered a batch of 55 (25 left) and can offer them for 7 Euro each plus shipping.

You can find the documentation including a modified schematic and the board layout here:
English:
http://www.sdiy.de/en/projects/oct-hz-converter.html
German:
http://www.sdiy.de/de/projects/oct-hz-converter.html

If you are interested in the prototype or the regular PCBs please PM me or preferably write to myusername [ät] gmx [döt] de (I hope everyone gets that but the spammers don't ).

[sonicwarrior]

This is how it looks like when it's stuffed:



Note: I used different trimmers then mentioned in the documentation for P1 and P3 because I had only 50K trimmers in this footprint. P1 is only a voltage divider so that the 50K should work there, too, and P3 is a 10K, so a 50K shouldn't hurt. In the prototype I used a jumper for P3 as it didn't have an effect when I calibrated it with my MS-10. I will test this PCB with my CS-30.

P3 is meant to ease the calibration process.