The original posting describes a spectrum analyzer that shows the strength of radio-frequency signals. It's built by reprogramming a toy that uses the Texas In

The original posting describes a spectrum analyzer that shows the strength of radio-frequency signals. It's built by reprogramming a toy that uses the Texas Instruments CC1110F32 RF system-on-a-chip (http://focus.ti.com/docs/prod/folders/print/cc1110f32.html http://focus.ti.com/docs/prod/folders/print/cc1110f32.html) You (jules) are discussing a spectrometer, that shows the strength of optical spectral lines to identify materials (http://en.wikipedia.org/wiki/Spectrometer http://en.wikipedia.org/wiki/Spectrometer). These are two totally different things - radio-frequency vs optical. (Just want to keep the discussion from getting totally confused.) Also, Natrium == Sodium (Na)