I made a post in this thread, but since I need collaborators for my project.http://arduino.cc/forum/index.php/topic,133035.msg1009342.htmlI need an Arduino-controlled device that moves a camera horiziontally approximately 0.25 meters per second while taking a picture for 1/10th second.
This is for an experiment -- scientific measurements of display motion blur. (Cameras taking pictures of moving test pattern objects on screen)
I can build it myself, but my time is quite short/lacking. I can write Arduino programs myself, and I can create electronics circuits.
Essentially, camera starts moving, accelerates, [BEGIN precision requirement] then takes a picture for 1/10th second [END precision requirement]
, then camera decelerates to a stop. I only need one picture, but when the shutter is open, the precision requierments apply.
Here are my preferred requirements:
(1) Must fit on a desk (ideally less than 1 meter long (1 to 3 feet long) maximum 4 feet long. Less than 1 feet deep).
(2) Speed control: 1mm per second increments, up to at approx ~300mm per second. (more is desirable -- but not needed now)
(3) Speed error: +/- 1mm per second error (@250mm per second)
(4) Positioning error: +/- 1 centimeter (Manual shutter timing fine-tuning should be manageable)
(5) Amount of time the precision is required: 1/10th second (macro mode)
(6) Moving mass required: Typical point-and-shoot camera (1/10sec allows use of lightweight camera w/manual exposure ability)
Acceptable precision degradations, if certain parameters are expensive/difficult to meet:
(2b) Speed control: 5mm per second increments (= 0.5mm per second difference during 1/10sec exposure)
(3b) Speed error: +/- 10mm per second (= 1mm error during 1/10sec exposure)
(4b) Positioning error: +/- 5 centimeter (I can do multiple attempts until subject matter is fully in the frame)
The movement mechanism can be anything:
- Stepper motors and a metric threaded screw.
- A hacked inkjet printer mechanism (with the camera mounted to what used to be the cartridge holder)
- A conveyor belt mechanism.
The camera will be computer/Arduino controlled (using a modified shutter button wired to the computer, or by using Canon CHDK custom firmware modification).
The precise details are left to you, but the system must be reasonably cheap and easy to build copies of (100% open-source build instructions, with photos -- will pay extra $ for your photos taken while you build the device). I'll be publishing the stuff on my BlurBusters blog
You can also contact me directly at mark[at]scanningbacklight.com
The BlurBusters Blog