Hi, I am currently attempting to design a digitally operated timer for a pinhole camera (similar to this http://www.flickr.com/photos/92561604@N ... 223607004/ (minus the exposure meter and with at least 4 seven segment LED's instead of an LCD display to display time from 0001 to 9999 secs)) however I'm a bit inexperienced when it comes to microcontrollers. I have currently got an arduino with the servo shield attached, this is working fine, but my problem is figuring out how to create an interface so that the user can input the allotted time for the exposure.
Thanks
James
Pinhole Camera Timer
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- Franklin97355
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Hi, thanks for the response. I like the idea of using a rotary encoder. How would I link the encoder up to the timekeeping chip and the arduino?
This sort of time of exposure may be needed for night time shots (especially with a pinhole camera and with the problems of reciprocity failure presents) or star trails and the like.
This sort of time of exposure may be needed for night time shots (especially with a pinhole camera and with the problems of reciprocity failure presents) or star trails and the like.
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see this thread for a discussion of running an arduino with a clock crystal, though i don't think it's necessary. since you'll just be waiting for x amount of time to elapse the arduino timer functions should suffice.
attach the encoder to pins 2 and 3 and use the attach interrupt function to get yourself notified on pin changes.
attach the encoder to pins 2 and 3 and use the attach interrupt function to get yourself notified on pin changes.
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Re: Pinhole Camera Timer
Thanks for the response mtbf0, sorry its taken me a while to say that :S I've just revisited this project.
I like the idea, but I was wondering if instead of building my own interface would it be possible to use something like this:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 82fff673c5
How hard would it be? It appears to use a mini-jack, so I wouldn't have thought wiring it to the arduino would be too much of a problem, just interpreting the data.
What I really want to know is if this would be possible? & Would it be easier or harder than hooking up my own interface (Rotary encoder, LED or otherwise)?
I like the idea, but I was wondering if instead of building my own interface would it be possible to use something like this:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 82fff673c5
How hard would it be? It appears to use a mini-jack, so I wouldn't have thought wiring it to the arduino would be too much of a problem, just interpreting the data.
What I really want to know is if this would be possible? & Would it be easier or harder than hooking up my own interface (Rotary encoder, LED or otherwise)?
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Re: Pinhole Camera Timer
that would be much easier than designing your own interface.. atleast it appears to be.. you can google something like "canon EOS remote shutter DIY" to figure out how the remote bit works. seems well documented.
-j
-j
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Re: Pinhole Camera Timer
Thanks jeh, I think i'll be giving this a go
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Re: Pinhole Camera Timer
good luck buddy... from the very little I read about the remote, it will be very easy.. just a few lines of code, it's essentially a momentary button, when the two pins are connected the shutter should fire, lots of examples on how to wire a button
-j
-j
Please be positive and constructive with your questions and comments.