Hmmm, Starting to get tricky. There are all kinds of 120 V. "clapper" switches. I wonder if they have a circut that drops voltage from line current that could be bi-passed? Thought of a goofy level idea. I stick the camera on a monopod and raise it high overhead. I could have a plumb-bob down the center and it would ground when it touched the sides of the tube. AZ Build a 120/35mm Lookaround! The Lookaround Book. Now an E-book. http://www.panoramacamera.us > -------- Original Message -------- > Subject: [SPAM] Re: more DIY > From: Stephen Ylvisaker <stephen@xxxxxxxxxxx> > Date: Thu, October 23, 2008 11:35 am > To: List for Photo/Imaging Educators - Professionals - Students > <photoforum@xxxxxxxxxxxxxxxxxx> > A latching relay is simple to make. Select a relay with one contact set (at least) that makes contact, when the relay operates, before the other side breaks contact; ie. a make-break contact set. The power/voltage to trigger the relay, after the light sensor was triggered, could go through the break contacts, and the power/voltage to hold the relay operated would go through the make contacts. I'd suggest a second, momentary relay to be triggered to reset the circuit to the original state. > Stephen > ----- Original Message ----- > The laser remote switch for a flash would be momentary - I'd need a > latching relay to keep the circuit closed, which might be do-able. It's > to turn a motor on and off. > AZ > Stephen > stephen@xxxxxxxxxxx > "To Americans America is something more than a promise and an expectation. > It has a past and tradition of its own. A descent from men who sacrificed > everything and came hither, not to better their fortunes, but to plant > their idea in virgin soil, should be a good pedigree. There was never a > colony save this that went forth, not to seek gold, but God." > James Russell Lowell
