I should get straight to the point, while all the info is very helpfull too. What would be the longest possible time it would take to turn on an incandecsent 150 watt bulb with a triac controlling 110 volt 60Hz current. Somehow I figured it could be as long as .040 secs. This is assumming a perfect light bulb, that would illuminate instantly and a perfect triac, that would turn on instantly. Thanks John ----- Original Message ----- From: "Michael Reid" To: Sent: Thursday, April 24, 2003 8:38 AM Subject: Re: [EE]: Triacs, turn on characteristics > there are some great TRIAC tutorials on the teccor web site, on ST's web > site, as well as other manufactures of TRIAC's. Most TRIAC's are 3 quadrant > devices. Teccor also has sensitive gate TRIAC's that can be triggered > directly from I/O's of some microcontrollers, using an inexpensive diac vs. > opto isolator. > > > > > On Thursday 24 April 2003 08:13 am, John Pearson wrote: > > How fast are generic Radio Shack triacs for switching 110v 60Hz > > current to...say...a 150Watt incandecsent light bulb. > > > > When the triac is enabled, where on the AC wave form will it turn > > on? Anywhere? > > You don't "enable" a triac, you turn it on. And it turns on within a > very short time (a few usec) of turning on the trigger current. > > > How about turning off, as I recall, the AC needs to cross zero for > > a triac to turn off? > > > > Thanks for any help. I am in a real pickle here. Got caught BSing > > on a forum and need to do some damage control. ; ) > > > -- > Ned Konz > http://bike-nomad.com > GPG key ID: BEEA7EFE > > -- > 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. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.