Construction Guide Do-It-Yourself Spectrometer for 10 US $
A spectrometer for 10 US $? Impossible – after all, commercial spectrometers cost several thousand euros. And yet it can be done, as a project run by the organisation Public Laboratory for Open Technology and Science (PLOTS) shows.
Spectrometers are measuring instruments with which materials can be identified by their absorption properties, and are usually very expensive. But now PLOTS has published on its homepage a construction guide for a low-cost spectrometer: the components required cost not more than 10 US $. If HD resolution is desired, the material costs amount to around 30 US $
Open source software displays the spectrum on a PC
The PLOTS spectrometer covers a measurement range from 400 to 900 nm with a resolution between 5 and 10 nm and processes 20 to 30 samples/s. It consists mainly of a webcam, a no-longer-required DVD and the casing of a VHS video cassette. The open source software necessary for operating measuring instrument is likewise already available online. A kit for the spectrometer is offered by the BreadPig Shop for 30 US $.
The construction guide on video: