On Sun, 2009-04-12 at 22:04 -0400, John Kasunich wrote: ... snip > Regardless of the type of turn-on, once the Triac is on, it won't turn > off until the current through it goes to zero - even if the LED is off. > That's why SSRs only work for AC - in a DC circuit the current won't go > to zero. > > Hope this helps, > > John Kasunich
Thanks John. Did you mean "That's why _SCR's_ only work for AC"? I was looking at two devices, both datasheets looked the same to me except: S108T02 has "Zero crossing functionary (VOX : MAX. 35V)" S108T01 has "Non-zero crossing functionary" I just want to turn a 24 VAC transformer on and off for my weathercam antenna rotor, so I suspect either one will work. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
