- Download the program.
- Three parameters can be modified in the source file
to match your needs:
#define NumberOfPhotos 20
Number of photographs per turn
#define PhotoSavingTime
Interval between shots (in hundredth of second)
#define InitialWait 100
Delay before first trigger (in hundredth of second)
- Download the LeoCAD design files
VR-object turntable
Used together with my Coolpix 990 remote control, this turntable forms an automatic studio for simple VR-object movies. It rotates the object on 360° and shoots photographs with equally spaced angles. You can then animate these images with a VR-object viewer such as PTviewer, Freedom-VR or Objplay. Remote and turntable can both be built with Lego Mindstorms Robotics Invention System (only parts included in this box are needed).
You can see some samples in my VR-object page.
Photography tip
To have even exposure between images, don't forget to use Automatic Exposure lock. The other method (that I applied) is to use full manual mode. Similarly, I used fixed distance focussing.
Program
The program is written with 
, it must be compiled
and downloaded in RCX before using it. I use RCX
command center shell to edit the source files (RCXcc is
now BricxCC, get it here).
It is almost identical to Panobot2 program, except that the number of step per turn is 160 here, the encoder cylinder has two black and two white zones instead of one.
Construction
The rotating disk placed on Lego wheel is made with sandwitched cardboard/foam/cardboard (see photos below). Make it large enough so that disk edge is out of depth of field.
Photo gallery
July 2004 update:
Bo Lorentzen, inspired by this page, built a motorized lazy Susan: a wheel, pressed against the edge, drives the turntable. A black and white strip is read by a light sensor to measure rotation angle.
See below the photographs he sent me:
