Rob: > > I have found some rather nice blue/red bi-colour LED's (3 lead common > > cathode) which I'd like to use for monitoring CV/signal amplitude ... Jarek: > You will need 2 opamps, 2 diodes and 5 resistors. > I can send you the schematics if you want. I wouldn't mind seeing Jarek's schematic (please?) *and* the source of those red/blue LEDs. :-) -- john