Believe me, I’ve looked quite a few times at the picture that came out of my LEGO Mindstorms Pinhole camera, but it wasn’t until yesterday that I realized that the print is in Negative. Of course!
After creating a positive using 1 single Gimp function, here’s the result:
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I finally finished the video about the LEGO Mindstorms Pinhole Camera. Because of the latest advances of the Light meter (actually starts to work now) I´ll soon post more details here.
Here’s the video.
More on my Mindstrorms creation here.
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A Fully working LEGO built and Mindstorms controlled Pinhole Camera. Printing directly on paper instead of negatives. This is still a work in Progress, as I am still testing the Light Meter program…
More on: http://abiteof.com
Category: Science & Technology
Uploaded by: alexKbcn
Hosted: youtube
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The idea is really good. Robotic construction with the use of a cellphone (read: iPhone or Android) as the processing Unit. This is quite a step ahead from the standard available robotics kits, which either come as pre-assembled or one-purpose kit with which you can only make one (or a small set of) robotic inventions, or they come closer to the LEGO mindstorms kit or Fishertechnik that come with their own controller.
Romotive‘s Idea is to allow people to program and control their robotic kits, The ROMO, with their smartphone, using a combination of apps (a true “app store” for robots) and the Phones SDK, libraries are still in development. This flexibility will also come on the hardware side, where you can by modules for your bots, servo motors, different types of sensors, etc.
As a new start-up at Kickstarter.com Romotive is doing quite well and is almost near the 32.000$ of their financial target to make it a reality. Their starter model is a quite simple base with a phone stand and connector and looks like it will give quite some hours of entertainment. The basic set, as a Kickstarter Project backer will cost you 78$ and you’ll get the first base model. the interesting part is that if you pay a bit more (141$), they send you 2 models, with which you can “play” together in a mario-style augmented reality game.
Kickstarter project Page: http://www.kickstarter.com/projects/peterseid/romo-the-smartphone-robot
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After some weeks looking at it, I decided last weekend to give my LEGO Mindstorms Pinhole Camera a try. We set-up a small darkroom in our bathroom to be able to load the paper into the camera and to develop it afterwards. The good thing was that we needed little space as the amplifier wasn’t needed.
It took me about 5 minutes to cut the strips of paper, load the camera roll and tape the camera box closed for the trial run. Once done, it was a bit scary to open the light, but we went to our roof terrace to make some test shots (taking advantage of the fact we had to be up there to hang our laundry up to dry).
Since I could find little information online on the exposure times to use when projecting directly onto paper, I went for pretty rough exposure times. 60 seconds and 90 seconds, each shot.
After the third shot, I missed the sound of the servo-motor controlling the film winding. Something went wrong. We took a couple of shots more, without moving the camera and decided to go down and develop the paper.
Here is the result:
I am very happy something came out, and that you can actually see a very shady and ghostly image… but an image!! A lot more than I was expecting!!
As you can see from the strips, there is some light leakage, which I don’t really mind. The images are over exposed, so I guess the exposure times should be more around 30 – 45 and 60 seconds depending on the light situation (we made these shots on a very sunny day in Barcelona). Also the as you can see from the strip above, there is a triple exposure.
The transport mechanism got stuck indeed. I believe that the main cause was the thickness of the paper, a lot thicker than the normal print paper I ran tests with.
I’ll now have a look if I can improve the transport of the paper, so it won’t get stuck and do some more tests with different exposure times…. to be continued!
Hanging up the laundry….
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I am an IBM Certified Associate Developer for Lotus Domino 7 Applications since 2006.
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