On 7/19/06, Olin Lathrop wrote: > Mark Rages wrote: > >> 1 - There should be a cap to ground from the node between R1 and R2. > >> Otherwise any supply noise and anything that node picks up is going to > >> end up on the signal. There should be at least a 100nF ceramic, and > >> maybe a 10uF electrolytic too. A single 1uF ceramic is probably good > >> enough. > > > > But then it won't cancel supply noise from the mic. > > Right, but then it wasn't doing that before either. > Why not? Regards, Mark markrages@gmail -- You think that it is a secret, but it never has been one. - fortune cookie -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist