0-5V>------|+\ | >---+--->0-10V +--|-/ | | | +---[R]---+ | [R] | GND
R can be anything as long as they're both the same and the opamp can supply the drive current. 100k would probably be fine, but I'd go with 10k if I could. If you get an opamp with rail-to-rail inputs and outputs you'll be able to use a single 12V supply, otherwise you'll need a positive supply high enough to give the opamp the headroom it needs to get the output to +10V and a negative supply low enough to keep the output from bottoming out before the input gets to zero volts.