Hey guys, I am pretty new to this, but I am taking electrical circuits this year so you'll probably get to know me pretty well.
I am trying to build a trigger cable to sync my digital camera and some flash slaves I own. I've used a multimeter to take some readings, and I think I need a relay to get this to function, but the behavior is a little strange and I don't know what to get.
Don't worry, I have a diagram
**broken link removed**
Basically, I have four wires, which I'll call C, D, A, and B. The voltage difference between C and D is normally 3v, with a current of .3amps running through the wires. When the flash slave triggers, the voltage drops to .55v and the current stays the same. At this moment, I need to rapidly short out wires A and B.
It seems like I need a normally closed relay that opens up at around 2.5v, and closes again at around 1.5v to be safe. Does this sound right? If so, where can I find something like this in the United States?
Also, what kind of response time can I expect from such a relay. ie: Milliseconds, Microseconds, 2 seconds (hopefully not ).
Thanks guys, I appreciate the help.
btw: The slaves are pocket wizards and the camera is a 20d if any of you have any better ideas.
-Eric
I am trying to build a trigger cable to sync my digital camera and some flash slaves I own. I've used a multimeter to take some readings, and I think I need a relay to get this to function, but the behavior is a little strange and I don't know what to get.
Don't worry, I have a diagram
**broken link removed**
Basically, I have four wires, which I'll call C, D, A, and B. The voltage difference between C and D is normally 3v, with a current of .3amps running through the wires. When the flash slave triggers, the voltage drops to .55v and the current stays the same. At this moment, I need to rapidly short out wires A and B.
It seems like I need a normally closed relay that opens up at around 2.5v, and closes again at around 1.5v to be safe. Does this sound right? If so, where can I find something like this in the United States?
Also, what kind of response time can I expect from such a relay. ie: Milliseconds, Microseconds, 2 seconds (hopefully not ).
Thanks guys, I appreciate the help.
btw: The slaves are pocket wizards and the camera is a 20d if any of you have any better ideas.
-Eric