On 11/12/06, dax2@hotmail.com wrote: > I need to use a 12F675 to detect an audio signal of about a volt. Any ideas? A retriggerable monostable with the lowest audio in frequency as retriggerable time? Input through comparator ( one limiting input resistor) or A2D to assure the low level input. Vasile -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist