This instructable is a step-by-step assembly guide for the educational colorimeter kit we launched in April 2012 on Kickstarter
. Assembly takes from 20-40 minutes. Once assembled the colorimeter can be used in a wide variety of science experiments to measure the absorbance and concentration of a colored solution.
The colorimeter kit is an open source hardware project: KiCad files for the electronics, enclosure designs and software are hosted and updated here: https://bitbucket.org/iorodeo/colorimeter/.
For those interested in making their own boards and laser cut parts we have included the Gerber files for the 3 PCBs with BOMs, as well as the files for the laser cut parts. A list of all additional materials (hardware etc) can also be found in the online User Manual
For more information on the educational colorimeter kit, visit the project website at www.iorodeo.com/colorimeter
and the Kickstarter project at http://www.kickstarter.com/projects/iorodeo-colorimeter/educational-colorimeter-kit
There is now a video of the assembly at the end of this instructable in Step 8.