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IR is electromagnetic radiation with longer wavelengths than those of visible light at 0.74 micrometres (µm) to 300 µm, which is extends the nominal red edge of the visible spectrum.

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Is there a way to convert the IR signals from remote controls (for TV's, DVD players, etc.) into audible sound signals? There is a good circuit online, but it uses the CA3237E which is obsolete, so no …
asked Jun 3 '17 by El Ectric