NLC Dual LFO/VCO - part 2

 pART 2 of my NLC dual LFO/VCO build
Part one is here:
https://djjondent.blogspot.com/2020/02/nlc-dual-lfo.html

 This module is a DIY eurorack format module.

tHE  LM13700 op amp

DG 202

The DG202 is a CMOS switch. Its a quad SPST switch.
The DG 212 should also be ok to use.

The "DG " stands for double gate.
Double Gate CMOS  (DG)
 Traditional CMOS technology is approaching physicial limitations was we approach the nanoscale regime.
One such solution is the double gate transistor, proposed in the 1980s.
"Multigate transistors are one of the several strategies being developed by CMOS semiconductor manufacturers to create ever-smaller microprocessors and memory cells, colloquially referred to as extending Moore's law.^"

Time to build the top PCB

Re the LEDs
Andrews notes say
" Use 3mm LEDs, bipolar ones look good. If red/green use 1k for RL. If red/blue use 4k7 for RL"
I couldn't find suitable Bi-polars, so I used standard Red LEDs.

Links

+ NLC Wiki
+ NLC Build guide and BOM
+ NLC Blog (old)
+ NLC blog (new)
+ CMOS  info 
+ NLC DIY info 

 

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