antto wrote:component tollerance does make a difference, together with component tollerance of the adaptor (and it's type)
i'm not good with electronics, that's just my impression
aminoacid wrote:i was thinking that VCC (depending on the VAC of adaptor) would change the 12V line but thats not how it works if im right...
the 12V line is determined by r178, r179, 5.333V and voltage offset of the op amp.
if i calculated this correct 12V can swing depending on r178 and r179 between 12.53V and 11.23V (regardsless of input voltage offset).
so r178 and r179 would determine the voltage of the 12V line.
ac adapter will determine the current of the 12V line.
i might have to socket r178 and r179 now
evostars wrote:Just one, 178 or 179. Replace it by a trimpot to adjust the 12v.
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