Please excuse my butting in. But I wonder if you know whether your triac is firing in all four quadrants. ----- Original Message ----- From: "Anand Dhuru" To: Sent: Monday, March 29, 2004 10:40 PM Subject: Re: [PIC] triac driving a monitor > Peter, I suspected that as well (from my earlier experience with Girder and > UIR), but in this case when the remote misbehaves, so does the local/manual > momentary switch. I therefore think the issue is to do with the fact that I > do not have a snubber circuit across the triac. > > Even so, I still cant figuire out why the PIC should not respond to the > inputs. That too, its not as if the PIC is hopelessly locked and *has* to be > reset to recover; it would respond to an input (IR or the switch) if you try > a dozen times! > > I did try the snubber from the URL given by Adam. The values which seemed to > work were 100 ohms and 0.47 uF. But now, the monitor LED flickers at times > even when the triac is off, the current being passed on by the snubber > itself. > > Perhaps another combination of R-C might wok better? > > Regards, > > Anand > > > ----- Original Message ----- > From: "Peter L. Peres" > To: > Sent: Tuesday, March 30, 2004 1:14 AM > Subject: [PIC] triac driving a monitor > > > > Anand, your monitor probably has strong parasitic radiation due to decayed > > filter capacitors and jams the remote receiver. Try to scope the IR rx > > signal. An easy way is to put a 2mA LED in series with its pullup resistor > > on the output. But this will not show glitches. > > > > Peter > > > > -- > > http://www.piclist.com hint: The PICList is archived three different > > ways. See http://www.piclist.com/#archives for details. > > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.601 / Virus Database: 382 - Release Date: 29-Feb-04 > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.