NLC Dual LFO / VCO

 These are  my build notes for the nonlinearcircuits Dual LFO/VCO module.
Its Eurorack format.

 These are the virgin PCBs

icS first

I'm waiting on some parts.
The LM13700 is a general purpose op-amp.

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.^"

If you don’t really care about 1V/oct tracking then you do not need

to install 1k tempcos but you must install the 1k 0805 resistors on the bottom side of the PCB.

the 3mm LEDs are bipolar. They are 2 pin.

If red/green use 1k for RL. If red/blue use 4k7 for RL 

I'm using red/green LEDs

Mouser

to be continued...............
Part 2 is here:
NLC Dual LFO/VCO - part 2

Links

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

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