Thanks David. Looks like a good choice..... Dave on 12/4/06 16:39, David J. Hughes at hughes_david_j at btopenworld.com wrote: > Dave, > > Try the MC14490. > > http://www.onsemi.com/pub/Collateral/MC14490-D.PDF > > Six circuits on the chip, available in DIP and just one external cap for > timing. > > Hope this helps. > > David