Control device

Details Control device Control device

H - Electricity

03

J

347/9

H03J 9/06 (2006.01) H01R 12/16 (2006.01) H04N 5/64 (2006.01)

Patent

CA 1228149

ABSTRACT A reflective screen with a gradient of reflectivity is moved by a control handle outside a cabinet to display different parts of the screen through a window to a LED and a phototransistor. The changing of the light reflected by the screen from the LED to the phototransistor is used to control an electrical parameter, providing a low cost control device.

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