an old DVD-R, and a VHS cassette case. In this tutorial of Public Labs’ DIY video spectrometer, [Jeffery] takes us through the process of building a spectrometer. After cutting a small bit of ...

It was to dig through bins full of the things shown below (many of them 3D-printed and all of them common or inexpensive) and to build a working spectrometer. We wanted them to make a device that ...