[sdiy] Improved VCO Posted

[Ray Wilson]

Hi DIYers

I improved my "Improved & Updated VCO" a bit more.

Still uses CA3046 but now uses a separate Op-Amp for the pulse wave
comparator.
http://atlas.csd.net/~rjwsoft/OctVCO_FixedSquare.html

Uses LM394 super-matched pair and uses a separate Op-Amp for the pulse wave
comparator.
http://atlas.csd.net/~rjwsoft/OctVCO_LM394_FixedSquare.html

I suggest that if you build these you try LF444 and LF442 instead of TL0's
for lower power consumption. Also if you have a 2K tempco then use 100Ks for
the control voltage inputs. My tempco is 1K (PT146) and thus the 49.9K
inputs.

Enjoy

Ray