Okay, so maybe parallel op-amps (for cheapness).Of course, I haven't yet taken any formal electronics courses, and my knowledge of op-amps is a tad limited, but should this do what I want? (Please excuse the awful drawing - I did it basically freehand in inkscape.) Can I power the op-amps in series, or is what's shown the best I can do?
EDIT: Just realised why that's stupid - the dual part only has one voltage in/out 
EDIT2: Fixed link above for new circuit.
Does it matter which op-amp I use?
Also, just so I understand the circuit a bit more - the two resistors (R1 and R2), are they there to do really basic voltage splitting? In my head, they do voltage splitting for the op-amp, which then powers the rest of the circuit, like a buffer. Correct?
BTW, if it makes sense, I can go for two batteries in series. Should I?
Thanks very much for your help!
poly-p man
[Edited by poly_poly-man on 02-21-2008 at 06:54 PM.]
posted 02-21-2008 06:31 PM CST (US) 
