VCO555 question

Scott Gravenhorst chordman at
Tue Nov 9 09:24:55 CET 1999

Rene Schmitz <uzs159 at> wrote:
>At 17:00 09.11.99 -0700, --M wrote:
>>    First let me thank you all for the op amp theory very enlightening.
>>I found the Schematic and PCB layout for a VCO based around the 555.
>My VCO 2,3 & 4 are based arround the 555 as well, better to use the CMOS
>variant 7555, since the nasty powersupply behaviour of the bipolar 555. The
>schemes have also improved leakage (=low frequency end) compared to Toms
> René

Is the 7555 pin for pin?

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