[sdiy] 3 student projects working so far!

[Aaron Lanterman]

Spent a long time helping people debug and tweak today.

Today we have confirmed, working on the breadboard, and musically  
tweaked, and hence going into solder:

1) Highpass Sallen-Key based on SSM2040 datasheet, using OTAs
2) Cauer filter based on SSM2040 datasheet, using OTAs
3) Diode ladder LPF based on Roland 100

The lab is alive with the sounds of filter sweeps!

11 more to go (in various stages of being close or far from going,  
some close, some far...)

When I get the final reports in I'll post them on line so other people  
can build, tweak, and enjoy.

- Aaron