Everyone has at least one DVD they are ashamed of buying. You know, the DVD that was 'a good idea at the time', was watched half way through and then consigned to the back of the DVD rack, 'hidden' from prying eyes. This instructable makes some use of that mistaken purchase.
This idea came out of my need for a workable spectrometer to gather some data. Rather than looking to buy a commercial one, it was more useful (and cheaper) to build it out of the bits I had lying around. It turns out its fairly easy to use a CD for this purpose - but most of the older related pointers seemed to require you to build a box yourself, and in any case I wanted to use a DVD to improve the resolution.
Thus the idea of taking the DVD, case and all, to construct the spectrometer was born.
Step 1: Parts list
- One extremely naff DVD, in a black, full size case
- Stiff card
- Two knife blade refills, or the lid from an old tub of margarine
- 'DVD Spectra' Templates
- Old translucent plastic bag
- Sharp knife
- Steel rule
- Multipart rotary tool, such as a dremel
As far as the DVD is concerned the best option is a single layer DVD to ensure you get a sharp spectra. These can be found often as the old 'flippy' DVDs, the freebie DVDs given away with newspapers/magazine, or writeable DVD.
The sturdier the card, the sturdier the 'DVD Spectra' - however the harder it is to cut. By all means you can use the cornflake box, but I'd suggest something a little thicker.