
Question for school project. Trying to find more info
Hi all!
I'm trying to find out some more info for a school project I'm trying to do. My project is basically building a simple bramper using a micro controller my professor has provided. I'm been trying to scour the net for more info and it's been REALLY interesting seeing how other people build cool projects to interface with their cameras!!
Anyways, I've been trying to find specifications on the camera serial port and the flash port/pc sync for the camera. But it seems to come from a lot of tribal knowledge. Or more likely, what I'm trying to find is buried under a lot of unrelated search results.
Am I correct to assume the following: the serial port is there to tell the camera the take the picture?? So give it about 6-7volts to tell it to take a picture. Put it back to 0 to tell it to stop taking picture, i.e., releasing the shutter button? So if connect a circuit, it acts like a intervelometer?
However, what I'm getting confused (like an itch on the back of brain..) is why do devices such as the little bramper (
http://www.thewhippersnapper.com/LittleBramper) need to connect to the flash port?? I've been trying to figure that out...
My guess is that it uses the flash port as a way to keep track of how long you tell the camera to take the picture, like a feedback loop. So you send the camera via serial port...listen on the flash port/pc sync port..if it registers a "high" (or whatever it does to tell you shutter is open), count down until it hits the time you want and then you send the camera to close the shutter via serial port.
Am I correct in my guess?? Would appreciate any help! it's been nagging at me...
Also, if one were to incorporate usage of the flash, I assume you send a signal continuously and detect it when it goes high since the camera acts like an open switch until the shutter is open, at which time, it'll close??
Sorry for all these ignorant questions. But I've been trying to find out info before troubling others. Might google-fu might be lacking since I spent the whole afternoon trying to find more info by myself :/
Thank you in advance!
Rex
edit: i was mixing up my terminologies. Fixed paragraph to make sense.