I am working on a project that involves using various op amps and multiplier chips. The different opamps require different rail supplies (ex. one opamp requires +/- 10V, another requires +/- 5V, and another requires -2/+4V). What is the best way set this up. Can I use a +/- 15V supply and just use voltage dividers to supply the others or is there a better way? Thanks for any info.