| http://www.w3.org/ns/prov#value | - In the particular regulator illustrated, the light source is a light emitting diode and the photocell is cadmium sulfide chip or the like.In the circuit of FIG. 6 where corresponding parts are indicated by the same reference numerals, the voltage regulator 22 is connected across the dimness potentiometer 5c where its effect is primarily to lengthen the charging time of capacitors17, 20 as the line
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