My Mini Moog Voyager. Click to go to my web site...

Saturday, January 23, 2010

New project completed. A x0xb0x, Roland TB-303 clone. Bunch of headaches from a bad microcontroller and then a bad precision voltage reference. Got those fixed and it all seems to work.

Friday, January 8, 2010


I just purchased a TipTopAudio Z-DSP module. Very interesting. Based on a SpinSemi FV-1 DSP chip. TipTopAudio also sells a development kit which allows you to program your own algorithms. the DSP has a very compact and efficient instruction set and allows for some very interesting capabilities. Now, to find time to play with it...

MFB Sequencer weirdness.

Here are my MFB SEQ-02's. Very nice compact step/pattern sequencer. More geared towards musical scales than controlling rhythms like their SEQ-01 I think. These gave me some real headaches however. MFB, Muffwiggler forum, and the SDIY email list solved it for me. I was plagued with a high level, high frequency ripple. About 2 volts P-P, and 400 kHz. The picture below shows the noise. Turns out the shield from my patch cables was putting a capacitive load on the CV output and was causing all the problem.