LIGHT_TRANSMTTER

Published:2009/7/10 1:59:00 Author:May | From:SeekIC

This circuit modulates the current through a lamp filament. Use a low-voltage lamp with a thin, straight filament. They have a fast response to ftlament voltage variations. dc is applied to bias the fila-ment that is on, and the audio is superimposed. A BC457 drives a TIP147, which modulates the filament current.



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