The 555 is for giving 60Hz without any complicated divisors. I had thought of doing it in software, but I chose to go the other way. > -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Bob Barr > Sent: Friday, January 16, 2004 9:44 PM > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [EE]: Help with first time circuit > > > This may have been previously asked and answered but, if it > was, I missed it. > > What is the purpose of the 555 timer? Unless you're using it > to indicate temperature changes or some such, any fixed > timing that it's doing for you can be done with the PIC's > timers. Am I missing something here? > > > Regards, Bob > > > On Fri, 16 Jan 2004 19:34:12 -0500, Anthony Toft > wrote: > > >I have updated the schematic to include a properly sized > resistor and > >transistor, if anyone could take a quick look at > >http://cowshed.8m.com/trigger and tell me if there is any hope it'll > >work I'd be most appreciative. > > > >Thanks > > > >Anthony > > -- > http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu