[sdiy] Three more working PCB demos from this semester's synth class

Lanterman, Aaron lanterma at ece.gatech.edu
Mon May 4 22:32:07 CEST 2015


Though some of y’all might enjoy these…

Four-pole lowpass VCF with a 3D printed LED/LDR package (four LDRs around a single LED) for the main filter blocks, with another LED/LDR combo for VC resonance:

https://www.youtube.com/watch?v=5ysI6wSXW4k

A four stage wave folder in the style of Serge and Ken Stone, with the first two stage having JFETs in the feedback loops of the op amps acting as nonlinear variable resistors providing a weird control input:

https://www.youtube.com/watch?v=ZP_phLFWdOk

The 3rd, 5th, and 7th harmonic wave shapers from the Buchla 148 (twiddled to use a +15/-15 V supply)

https://www.youtube.com/watch?v=9t5bCKZrrDo

I am so fortunate to be able to do this class! This is so much fun.

- Aaron


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