[sdiy] Three new student draft circuits: Alex, Josh, Brian & Erin

[Aaron Lanterman]

See the top three at

http://users.ece.gatech.edu/~lanterma/ece4803/drafts/

Brian & Erin are two of my Savannah-based students; they're working on 
using FETs in a distortion pedal to try to get a natural amp breaking up 
sound. They are also working on other novel ways of torturing op amps in 
twisted ways.

Alex wants to try using FETs to add VC resonance to the Rene MS-20 (that 
seems popular among the students - it was my canonical Sallen-Key example, 
and the way the schematic is drawn it's easy to follow). He's already 
soldered up on perfboard the main part of the filter, instead of 
breadboarding it (I figured that would make Harry happy!)

Alex mentioned he was having trouble getting the solder to stick to the 
copper on his perfboard - any advice?

Josh is modifying Ray Wilson's 4-pole lowpass to be a 4-pole highpass 
(sorry the scan isn't great - it was pencil on graph paper, so normally I 
photocopy before running it through the digital sender to get a darker 
image, but the copier was AWOL)

- Aaron

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Dr. Aaron Lanterman, Asst. Prof.
and Demetrius T. Paris Junior Prof.    Voice:  404-385-2548
School of Electrical and Comp. Eng.    Fax:    404-894-8363
Georgia Institute of Technology        E-mail: lanterma at ece.gatech.edu
Mail Code 0250                         Web:    users.ece.gatech.edu/~lanterma
Atlanta, GA 30332                      Office: Centergy 5212