[sdiy] Littleman VCO error (555 chip inverted)

[Jimmy Gogas]

I'm looking at the Littleman VCO circuit, and I think that the 555 chip is 
inverted (mirrored --> 1 should be 8, 2 should be 7, etc.). Can anyone 
confirm that? I was also wondering if anyone can spot any other errors on 
the VCO (or anything you would improve on). Finally, does anyone have a clue 
about how this thing works? I know what the 555 chip does, but what exactly 
do the two pnp transistors do? How about the op-amps? And why are the 
resistors next to the PITCH connected like that? (Any other comments 
appreciated).

The shematics of the Littleman VCO can be seen at : 
www.itn.liu.se/~nikro/littleman/littleman.pdf

Thanks in advance.



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