Well, I'll be dammed. I guess that cap on the other side of the VB409 "was" feeding back through it, back to the bridge. I put another diode between the bridge and the VB409, and fed the voltage between the diode and the bridge to B0 via a 5M resistor, and it works almost perfectly now. I did have to put another resistor from B0 to ground to get it to work, but that's okay by me. Thanks to everyone who helped, and gave me input on how to solve this problem. Whew, now it's about time to move this project up to that 16F876 that I've got sitting here, and start on the ADC end of it. Anyone have a favorite opamp you'd recommend setting up as a voltage follower? Sincerely, Bob -----Original Message----- From: Olin Lathrop To: PICLIST@MITVMA.MIT.EDU Date: Friday, February 09, 2001 8:42 PM Subject: Re: [EE]: Schmitt Trigger (RB0) interrupt problem >> I have this circuit setup on a solderless breadboard. Could this setup be >> causing problems (capacitance between traces)? I'm asking because I >noticed >> that touching the wire going to B0 seems to make a bit of difference how >the >> triac is gated for some reason. > >That trace is at a high impedence (1Mohm). If you touch it, all the signals >your body is picking up by being one side of a capcitor get fed into RB0 >without much going thru the resistor. > > >***************************************************************** >Olin Lathrop, embedded systems consultant in Devens Massachusetts >(978) 772-3129, olin@embedinc.com, http://www.embedinc.com > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu